Professor Andrew Fleming
Professor
School of Engineering (Electrical and Computer Engineering)
- Email:andrew.fleming@newcastle.edu.au
- Phone:(02) 4921 6493
Building a future from the atoms up
Australian Research Fellow Associate Professor Andrew Fleming has co-authored a significant new book that is of particular interest to researchers in mechatronics and in control applied to atomic force microscopy and other nanopositioning applications.
Design, Modeling and Control of Nanopositioning Systems, co-authored with Associate Professor Kam K Leang from the University of Nevada, is the first comprehensive text on the complete design cycle of nanopositioning systems.
Published in 2014, the book covers three broad areas covering precision control theory; the complete process of nanopositioning control including practical difficulties and their solution; and applying basic principles to experimental application in atomic force microscopes.
Fleming's previous publications include over 130 papers for journals and conferences and three books. He also has six patent applications with international licensing in 13 countries.
A graduate of the University with a Bachelor of Electrical Engineering in 2000 and a PhD in 2004, Fleming is currently a Associate Professor with the School of Electrical Engineering and Computer Science and Director of the University's Precision Mechatronics Lab. The Lab enables a multidisciplinary group of electrical engineers, mechanical engineers and physicists to combine their knowledge to develop new mechatronic and robotic technologies for fabrication, imaging and health care. Fleming's research focuses on nanofabrication, micro-robotics, metrological sensing, nano-positioning and high-speed scanning probe microscopy.
Over the past 12 years, Fleming has secured over $10 million in funding, including a $750,000 Australian Research Council Future Fellowship for full-time research from 2014 to 2017 into miniaturising piezoelectric sensors. Amongst the many awards received in his stellar career, Fleming received the Newcastle Innovation Rising Star Award for Excellence in Industrial Engagement and Technology Transfer in 2012 and was named the University of Newcastle's Researcher of the Year in 2007.
"There is an ever increasing demand for higher performance and miniaturisation in mechatronic systems such as semiconductor process machinery, atomic force microscopy, and biomedical devices", explains Fleming. "This demand is driving the development of new high-performance methods for sensing and actuation, precision fabrication, and control.
"Research at the Precision Mechatronics Lab is at the forefront of these developments with a number of new technologies for building and controlling new miniature piezoelectric systems. These technologies are being applied to applications such as integrated circuit fabrication, ultrasonic machining, miniature robotics, and high performance motion control."
Fleming was also successful in receiving a $266,300 Australian Research Council 2015 Discovery Project grant for his research into atomic resolution sensors for imaging and metrological science.
Building a future from the atoms up
Associate Professor Andrew Fleming's research includes optical nanofabrication, nanopositioning control systems, high-speed scanning probe microscopy,
Career Summary
Biography
Andrew J. Fleming graduated from The University of Newcastle, Australia with a Bachelor of Electrical Engineering in 2000 and Ph.D in 2004. Dr. Fleming is now an Australian Research Council Future Fellow and Director of the Precision Mechatronics Lab at The University of Newcastle, Australia. His research includes nanofabrication, micro-robotics, metrological sensing, nano-positioning, and high-speed scanning probe microscopy. Dr. Fleming’s research awards include the IEEE Transactions on Control Systems Technology Outstanding Paper Award, The University of Newcastle Researcher of the Year Award, and the Faculty of Engineering and Built Environment Award for Research Excellence. He is the co-author of three books and more than 170 Journal and Conference papers. Dr. Fleming is the inventor of several patent applications and in 2012 he received the Newcastle Innovation Rising Star Award for Excellence in Industrial Engagement.
Research Impact
- 170 Publications, 70 Journal Articles, 91 Conference Articles, 3 Books
- 4100 Citations, H-Index: 37 (Google Scholar)
- 7 Patent Applications, international licensing in 13 countries
- Consulting: NASA, DSTO, US Army, Nikon, Stanford Accelerator Lab, GE Medical etc.
Awards/Fellowships
- Best Paper Award Finalist, IEEE Advanced Intelligent Mechatronics 2016
- ARC Future Fellowship 2014-2017
- Newcastle Innovation Rising Star Award, 2012
- ARC Australian Research Fellowship 2009-2013
- The University of Newcastle Vice Chancellors Award for Researcher of the Year, 2007
- Best Paper Award - IEEE Transactions on Control Systems Technology, 2007
- Faculty of Engineering and Built Environment Award for Research Excellence, 2007
- ARC Australian Post-Doctoral Fellowship 2006-2008
Funding
- Total $10.7M
- 30 Grants, 12 ARC Grants
- 3 Fellowships (12 Years)
Supervised Student Awards
- Yik Ren Teo – Best Student Paper Finalist, IEEE MSC 2015
- Shannon Rios – Best Student Paper Finalist, IEEE AIM, 2015
- Mathew Fairbain – Best Student Paper Award, Australian Control Conference
Professional Activities
- Chief Specialty Editor for Mechatronics, Frontiers in Mechanical Engineering (Nature Publishing Group)
- IEEE Nanotechnology Council – Control Systems Society Representative
- International Program Committee Member for the following conferences:
- American Control Conference, Chicago, IL, 2015
- American Control Conference, Portland, OR, 2014
- American Control Conference, Vancouver, 2013
- 3rd IFAC Symposium on Mechatronic Systems, Sydney, 2004
- Associate editor: Advances in Vibration and Acoustics (2007-2011)
- Grant reviewer for the Australian Research Council
- University of Newcastle Research Development Advisory Group (2009-2010)
Qualifications
- PhD, University of Newcastle
- Bachelor of Engineering (Honours), University of Newcastle
Keywords
- Atomic Force Microscopy
- Control Systems
- Digital Signal Processing
- Micro-cantilever sensors
- Nanometer Position Sensors
- Nanopositioning
- Optical Microfabrication
- Probe Based Nanofabrication
- Scanning Probe Microscopy
Fields of Research
Code | Description | Percentage |
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400799 | Control engineering, mechatronics and robotics not elsewhere classified | 100 |
Professional Experience
UON Appointment
Title | Organisation / Department |
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Professor | University of Newcastle School of Electrical Engineering and Computing Australia |
Awards
Research Award
Year | Award |
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2012 |
Rising Star Award Newcastle Innovation |
2011 |
Best Student Paper Award - Awarded to Mr. Matt Fairbain Australian Control Conference |
2007 |
Best Paper Award IEEE Transactions on Control Systems Technology |
2007 |
Researcher of the Year University of Newcastle |
Publications
For publications that are currently unpublished or in-press, details are shown in italics.
Book (4 outputs)
Year | Citation | Altmetrics | Link | ||
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2014 |
Fleming AJ, Leang KK, Design, Modeling and Control of Nanopositioning Systems, Springer, Cham, Switzerland, 411 (2014) [A1]
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2014 |
Fleming AJ, Leang KK, Design, Modeling and Control of Nanopositioning Systems, Springer International Publishing (2014)
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2006 |
Moheimani SO, Fleming AJ, Piezoelectric Transducers for Vibration Control and Damping, Springer, Berlin, 271 (2006) [A1]
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2003 |
Moheimani SO, Halim D, Fleming AJ, Spatial Control of Vibration - Theory and Experiments, World Scientific Publishing Co. Pte. Ltd., Singapore, 223 (2003) [A1]
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Chapter (17 outputs)
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2021 |
Ruppert MG, Franco Soares De Bem N, Fleming AJ, Yong YK, 'Characterization of Active Microcantilevers Using Laser Doppler Vibrometry', Vibration Engineering for a Sustainable Future Experiments, Materials and Signal Processing, Springer Nature Switzerland, Cham, Switzerland 355-361 (2021) [B1]
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2015 |
Leang KK, Fleming AJ, 'Tracking control for nanopositioning systems', Nanopositioning Technologies: Fundamentals and Applications 213-244 (2015) The performance of nanopositioning systems is greatly affected by their mechanical dynamics, and for piezo-actuated designs, induced structural vibration, hysteresis, and creep ca... [more] The performance of nanopositioning systems is greatly affected by their mechanical dynamics, and for piezo-actuated designs, induced structural vibration, hysteresis, and creep can drastically limit positioning precision. Therefore, tracking control, both feedback and feedforward control, plays an important role in achieving high-performance operation, especially at high operating frequencies. This chapter reviews popular feedback and feedforward control techniques for nanopositioning systems. First, the effects of vibration, hysteresis, and creep are described, where simple methods traditionally employed to avoid these effects are discussed. Second, various models for nanopositioning systems for control system design, simulation, and synthesis are presented. Finally, popular feedback and feedforward controllers to handle vibration, hysteresis, and creep are presented, along with experimental results.
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2015 |
Fleming AJ, Leang KK, 'Position sensors for nanopositioning', Nanopositioning Technologies: Fundamentals and Applications 245-294 (2015) Position sensors with nanometer resolution are a key component of many precision imaging and fabrication machines. Since the sensor characteristics can define the linearity, resol... [more] Position sensors with nanometer resolution are a key component of many precision imaging and fabrication machines. Since the sensor characteristics can define the linearity, resolution, and speed of the machine, the sensor performance is a foremost consideration. The first goal of this article is to define concise performance metrics and to provide exact and approximate expressions for error sources including nonlinearity, drift, and noise. The second goal is to review current position sensor technologies and to compare their performance. The sensors considered include: resistive, piezoelectric, and piezoresistive strain sensors; capacitive sensors; electrothermal sensors; eddy-current sensors; linear variable displacement transformers; interferometers; and linear encoders.
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2014 |
Fleming AJ, Leang KK, 'Charge drives', Advances in Industrial Control 317-336 (2014) Due to the hysteresis exhibited by piezoelectric actuators, many nanopositioning devices require sensor-based closed-loop control. Although closed-loop control can be effective at... [more] Due to the hysteresis exhibited by piezoelectric actuators, many nanopositioning devices require sensor-based closed-loop control. Although closed-loop control can be effective at eliminating nonlinearity at low speeds, the bandwidth compared to open-loop is severely reduced. In addition, sensor-induced noise can significantly degrade the achievable resolution.
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2014 |
Fleming AJ, Leang KK, 'Piezoelectric transducers', Advances in Industrial Control 17-41 (2014) Due to their high stiffness, compact dimensions, and extremely high positioning resolution, piezoelectric actuators are used exclusively in the vast majority of nanopositioning sy... [more] Due to their high stiffness, compact dimensions, and extremely high positioning resolution, piezoelectric actuators are used exclusively in the vast majority of nanopositioning systems. This chapter introduces piezoelectric actuators and describes their electromechanical properties, with a focus on those that are relevant in nanopositioning applications.
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2014 |
Fleming AJ, Leang KK, 'Types of nanopositioners', Advances in Industrial Control 43-55 (2014) The term nanopositioner is used generally to describe a wide variety of mechanical positioning devices with resolution in the nanometer range. Typically, a nanopositioner comprise... [more] The term nanopositioner is used generally to describe a wide variety of mechanical positioning devices with resolution in the nanometer range. Typically, a nanopositioner comprises a moving platform suspended by a number of compliant mechanisms or flexures (see example in Fig. 1. 1). The flexures may provide a preloading force on the actuator and guide the motion of the stage.
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2014 |
Fleming AJ, Leang KK, 'Position sensors', Advances in Industrial Control 103-153 (2014) Position sensors with nanometer resolution are a key component of many precision imaging and fabrication machines.... [more] Position sensors with nanometer resolution are a key component of many precision imaging and fabrication machines.
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2014 |
Fleming AJ, Leang KK, 'Feedforward control', Advances in Industrial Control 251-273 (2014) Unlike feedback control, which reacts to the measured tracking error, feedforward control compensates or anticipates for poor performance. A feedforward controller does this by ex... [more] Unlike feedback control, which reacts to the measured tracking error, feedforward control compensates or anticipates for poor performance. A feedforward controller does this by exploiting some information about the system, and thus a well-designed feedforward controller requires sufficient knowledge of the plant dynamics and nonlinearities.
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2014 |
Fleming AJ, Leang KK, 'Shunt control', Advances in Industrial Control 155-174 (2014) As discussed in Chap. 1, the foremost speed limitation in nanopositioning systems arised from the first mechanical resonance mode.... [more] As discussed in Chap. 1, the foremost speed limitation in nanopositioning systems arised from the first mechanical resonance mode.
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2014 |
Fleming AJ, Leang KK, 'Command shaping', Advances in Industrial Control 275-298 (2014) The speed of an electromechanical scanner is limited by its first resonance frequency. To maximize scan speed, input signals are required that contain negligible frequency compone... [more] The speed of an electromechanical scanner is limited by its first resonance frequency. To maximize scan speed, input signals are required that contain negligible frequency components near, or above the first resonance frequency. Such signals are usually obtained by low-pass filtering the desired scan trajectory.
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2014 |
Fleming AJ, Leang KK, 'Noise in nanopositioning systems', Advances in Industrial Control 337-393 (2014) Mechanical and electrical noise in nanopositioning systems is unavoidable and dictates the maximum positioning resolution. The major sources of noise include sensor noise, amplifi... [more] Mechanical and electrical noise in nanopositioning systems is unavoidable and dictates the maximum positioning resolution. The major sources of noise include sensor noise, amplifier noise, and external disturbances. In this chapter, these noise sources are discussed and their influence on positioning resolution is evaluated.
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2014 |
Fleming AJ, Leang KK, 'Force feedback control', Advances in Industrial Control 221-249 (2014) Up to this point, nanopositioning controllers have used displacement sensors as the feedback variable. The major drawbacks of typical displacement sensors are the limited bandwidt... [more] Up to this point, nanopositioning controllers have used displacement sensors as the feedback variable. The major drawbacks of typical displacement sensors are the limited bandwidth associated measurement noise.
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2014 |
Fleming AJ, Leang KK, 'Electrical considerations', Advances in Industrial Control 395-408 (2014) Due to their high stiffness, small dimensions and low mass, piezoelectric stack actuators are capable of developing large displacements with bandwidths of greater than 100 kHz. Ho... [more] Due to their high stiffness, small dimensions and low mass, piezoelectric stack actuators are capable of developing large displacements with bandwidths of greater than 100 kHz. However, due to their large electrical capacitance, the associated driving amplifier is usually limited in bandwidth to a few kHz.
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2014 |
Fleming AJ, Leang KK, 'Mechanical design: Flexure-based nanopositioners', Advances in Industrial Control 57-102 (2014) The dynamic performance of a nanopositioning system depends on its mechanical resonance frequency, damping, the type of controller used, sensor bandwidth, and associated data acqu... [more] The dynamic performance of a nanopositioning system depends on its mechanical resonance frequency, damping, the type of controller used, sensor bandwidth, and associated data acquisition hardware. Recently, speed has become a critical issue in many nanopositioning applications, such as video-rate AFM and high-throughput nanomanufacturing.
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2014 |
Fleming AJ, Leang KK, 'Feedback control', Advances in Industrial Control 175-219 (2014) Feedback control is the most commonly used technique for eliminating positioning errors in nanopositioning systems. This chapter provides an overview of feedback control technique... [more] Feedback control is the most commonly used technique for eliminating positioning errors in nanopositioning systems. This chapter provides an overview of feedback control techniques with an experimental comparison of integral control, inversion-based control, and IRC damping control. When the reference trajectory is periodic, repetitive control (RC) can significantly improve the tracking performance of a feedback loop. The RC approach is introduced for nanopositioning.
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2014 |
Fleming AJ, Leang KK, 'Hysteresis modeling and control', Advances in Industrial Control 299-316 (2014) This chapter focuses on the fundamentals of hysteresis, including modeling and compensation.... [more] This chapter focuses on the fundamentals of hysteresis, including modeling and compensation.
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2003 |
Jenkins J, Pigram J, 'Introduction', Encyclopedia of Leisure and Outdoor Recreation, Routledge, New York 1-7 (2003) [B2]
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Journal article (120 outputs)
Year | Citation | Altmetrics | Link | ||||||||
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2024 |
Yong YK, Eielsen AA, Fleming AJ, 'Thermal Protection of Piezoelectric Actuators Using Complex Electrical Power Measurements and Simplified Thermal Models', IEEE/ASME Transactions on Mechatronics, 29 798-800 (2024) [C1]
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2023 |
McCourt LR, Routley BS, Ruppert MG, Fleming AJ, 'Feasibility of gold nanocones for collocated tip-enhanced Raman spectroscopy and atomic force microscope imaging', Journal of Raman Spectroscopy, (2023) [C1] Microcantilever probes for tip-enhanced Raman spectroscopy (TERS) have a grainy metal coating that may exhibit multiple plasmon hotspots near the tip apex, which may compromise sp... [more] Microcantilever probes for tip-enhanced Raman spectroscopy (TERS) have a grainy metal coating that may exhibit multiple plasmon hotspots near the tip apex, which may compromise spatial resolution and introduce imaging artefacts. It is also possible that the optical hotspot may not occur at the mechanical apex, which introduces an offset between TERS and atomic force microscope maps. In this article, a gold nanocone TERS probe is designed and fabricated for 638 nm excitation. The imaging performance is compared to grainy probes by analysing high-resolution TERS cross-sections of single-walled carbon nanotubes. Compared to the tested conventional TERS probes, the nanocone probe exhibited a narrow spot diameter, comparable optical contrast, artefact-free images, and collocation of TERS and atomic force microscope topographic maps. The 1/ (Formula presented.) spot diameter was 12.5 nm and 19 nm with 638 nm and 785 nm excitation, respectively. These results were acquired using a single gold nanocone probe to experimentally confirm feasibility. Future work will include automating the fabrication process and statistical analysis of many probes.
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2023 |
Xavier MS, Harrison SM, Howard D, Yong YK, Fleming AJ, 'Modeling of soft fluidic actuators using fluid structure interaction simulations with underwater applications', International Journal of Mechanical Sciences, 255 108437-108437 (2023) [C1]
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2022 |
McCourt LR, Routley BS, Ruppert MG, Keast VJ, Sathish CI, Borah R, et al., 'Single-Walled Carbon Nanotubes as One-Dimensional Scattering Surfaces for Measuring Point Spread Functions and Performance of Tip-Enhanced Raman Spectroscopy Probes', ACS APPLIED NANO MATERIALS, (2022) [C1]
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2022 |
Jidling C, Fleming AJ, Wills AG, Schon TB, 'Memory efficient constrained optimization of scanning-beam lithography', OPTICS EXPRESS, 30 20564-20579 (2022) [C1]
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2022 |
Xavier MS, Tawk CD, Zolfagharian A, Pinskier J, Howard D, Young T, et al., 'Soft Pneumatic Actuators: A Review of Design, Fabrication, Modeling, Sensing, Control and Applications', IEEE ACCESS, 10 59442-59485 (2022) [C1]
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2022 |
Li L, Fleming AJ, Yong YK, Aphale SS, Zhu L, 'High performance raster scanning of atomic force microscopy using Model-free Repetitive Control', MECHANICAL SYSTEMS AND SIGNAL PROCESSING, 173 (2022) [C1]
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2022 |
de Bem NFS, Ruppert MG, Fleming AJ, Yong YK, 'Simultaneous tip force and displacement sensing for AFM cantilevers with on-chip actuation: Design and characterization for off-resonance tapping mode', SENSORS AND ACTUATORS A-PHYSICAL, 338 (2022) [C1]
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2022 |
Xavier MS, Fleming AJ, Yong YK, 'Model-Based Nonlinear Feedback Controllers for Pressure Control of Soft Pneumatic Actuators Using On/Off Valves.', Frontiers in robotics and AI, 9 818187 (2022) [C1]
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2022 |
Ruppert MG, Martin-Jimenez D, Yong YK, Ihle A, Schirmeisen A, Fleming AJ, Ebeling D, 'Experimental analysis of tip vibrations at higher eigenmodes of QPlus sensors for atomic force microscopy.', Nanotechnology, 33 (2022) [C1]
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2022 |
Seethaler R, Mansour SZ, Ruppert MG, Fleming AJ, 'Piezoelectric benders with strain sensing electrodes: Sensor design for position control and force estimation', Sensors and Actuators A: Physical, 335 (2022) [C1] Piezoelectric benders are widely used in industrial applications due to their low-cost and compact size. However, due to the large relative size and cost of displacement sensors, ... [more] Piezoelectric benders are widely used in industrial applications due to their low-cost and compact size. However, due to the large relative size and cost of displacement sensors, bender actuators are often operated in open-loop or with feed-forward control, which can limit positioning accuracy to 20% of full-scale. To improve the positioning accuracy of piezoelectric benders, this article proposes integrating resistive strain gauges into the electrode surface by chemical etching or laser ablation. These strain sensors are then used to measure and control the tip displacement. The proposed sensors are shown to suffer from significant cross-coupling between the actuator voltage and measured signal; however, this can be mitigated by judicious choice of the sensor location and actuator driving scheme. In addition to position sensing, a method is also presented for simultaneous estimation of the contact force between the actuator tip and load. The proposed methods are validated experimentally by controlling the tip position of a piezoelectric bender while simultaneously estimating the force applied to a reference load cell.
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2022 |
Xavier MS, Fleming AJ, Yong YK, 'Nonlinear Estimation and Control of Bending Soft Pneumatic Actuators Using Feedback Linearization and UKF', IEEE-ASME TRANSACTIONS ON MECHATRONICS, 27 1919-1927 (2022) [C1]
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2021 |
Seethaler R, Mansour SZ, Ruppert MG, Fleming AJ, 'Position and force sensing using strain gauges integrated into piezoelectric bender electrodes', Sensors and Actuators, A: Physical, 321 (2021) [C1] This article derives design guidelines for integrating strain gauges into the electrodes of piezoelectric bending actuators. The proposed sensor can estimate the actuator tip disp... [more] This article derives design guidelines for integrating strain gauges into the electrodes of piezoelectric bending actuators. The proposed sensor can estimate the actuator tip displacement in response to an applied voltage and an external applied tip force. The actuator load force is also estimated with an accuracy of 8% full scale by approximating the actuator response with a linear model. The applications of this work include micro-grippers and pneumatic valves, which both require the measurement of deflection and load force. At present, this is achieved by external sensors. However, this work shows that these functions can be integrated into the actuator electrodes.
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2021 |
Moore SI, Yong YK, Omidbeike M, Fleming AJ, 'Serial-kinematic monolithic nanopositioner with in-plane bender actuators', Mechatronics, 75 (2021) [C1] This article describes a monolithic nanopositioner constructed from in-plane bending actuators which provide greater deflection than previously reported extension actuators, at th... [more] This article describes a monolithic nanopositioner constructed from in-plane bending actuators which provide greater deflection than previously reported extension actuators, at the expense of stiffness and resonance frequency. The proposed actuators are demonstrated by constructing an XY nanopositioning stage with a serial kinematic design. Analytical modeling and finite-element-analysis accurately predicts the experimental performance of the nanopositioner. A 10µm range is achieved in the X and Y axes with an applied voltage of +/-200 V. The first resonance mode occurs at 250 Hz in the Z axis. The stage is demonstrated for atomic force microscopy imaging.
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2021 |
Ruppert MG, Fleming AJ, Yong YK, 'Active atomic force microscope cantilevers with integrated device layer piezoresistive sensors', SENSORS AND ACTUATORS A-PHYSICAL, 319 (2021) [C1]
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2021 |
Xavier MS, Tawk CD, Yong YK, Fleming AJ, '3D-printed omnidirectional soft pneumatic actuators: Design, modeling and characterization', Sensors and Actuators A: Physical, 332 (2021) [C1] Soft pneumatic actuators are usually fabricated using molding and casting techniques with silicone rubbers, which requires intensive manual labor and limits repeatability and desi... [more] Soft pneumatic actuators are usually fabricated using molding and casting techniques with silicone rubbers, which requires intensive manual labor and limits repeatability and design flexibility for complex geometries. This article presents the design and direct 3D-printing of novel omnidirectional soft pneumatic actuators using stereolithography (SLA) with an elastic resin and fused deposition modeling (FDM) with a thermoplastic polyurethane (TPU). The actuator is modeled and optimized for bending performance using the finite element method along with a hyperelastic material model that is based on experimental uniaxial tensile data. The designs inspired by fast pneumatic network actuators (PneuNets) allow for multimodal actuation including bending, extension and contraction motions under positive, negative or differential pressures. The predicted results from the finite element method are compared with the experimental results for a range of actuation configurations. These novel omnidirectional actuators have significant potential in applications such as pipe inspection and biomedical devices.
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2021 |
Xavier MS, Fleming AJ, Yong YK, 'Design and Control of Pneumatic Systems for Soft Robotics: A Simulation Approach', IEEE Robotics and Automation Letters, 6 5800-5807 (2021) [C1] Pressure control plays a major role in the overall performance of fluid-driven soft robots. Due to the increasing demand for higher speed actuation and precision, a need exists fo... [more] Pressure control plays a major role in the overall performance of fluid-driven soft robots. Due to the increasing demand for higher speed actuation and precision, a need exists for a practical design methodology that converts actuator performance specifications to a set of minimum pneumatic specifications, such as receiver volume and pressure, and valve conductance. This article presents a systematic parameter selection approach for pneumatic soft robotic systems by taking into consideration the desired closed-loop pressure responses. The two controllers under evaluation here are the PI controller with anti-windup and the on-off controller with hysteresis. Simulations are developed within Simscape Fluids to evaluate the effect of physical components and controller parameters on the actuator performance. The proposed parameter selection procedures are then applied on three soft actuators and their closed-loop pressure responses are experimentally evaluated. The measured pressure responses are in close agreement with the simulations and satisfy the rise time specifications.
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2021 |
Omidbeike M, Moore SI, Yong YK, Fleming AJ, 'Five-axis bimorph monolithic nanopositioning stage: Design, modeling, and characterization', Sensors and Actuators A: Physical, 332 (2021) [C1] The article describes the design and modeling of a five-axis monolithic nanopositioning stage constructed from a bimorph piezoelectric sheet. Six-axis motion is also possible but ... [more] The article describes the design and modeling of a five-axis monolithic nanopositioning stage constructed from a bimorph piezoelectric sheet. Six-axis motion is also possible but requires 16 amplifier channels rather than 8. The nanopositioner is ultra low profile with a thickness of 1 mm. Analytical modeling and finite-element-analysis accurately predict the experimental performance. The stage was conservatively driven with 33% of the maximum voltage, which resulted in an X and Y travel range of 6.22 µm and 5.27 µm respectively; a Z travel range of 26.5 µm; and a rotational motion of 600 µrad and 884 µrad about the X and Y axis respectively. The first resonance frequency occurs at 883 Hz in the Z axis. Experimental atomic force microscopy is performed using the proposed device as a sample scanner.
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2021 |
Xavier MS, Fleming AJ, Yong YK, 'Finite Element Modeling of Soft Fluidic Actuators: Overview and Recent Developments', ADVANCED INTELLIGENT SYSTEMS, 3 (2021) [C1]
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2020 |
Harcombe DM, Ruppert MG, Fleming AJ, 'A review of demodulation techniques for multifrequency atomic force microscopy', Beilstein Journal of Nanotechnology, 11 76-91 (2020) [C1]
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2020 |
Eielsen AA, Leth J, Fleming AJ, Wills AG, Ninness B, 'Large-Amplitude Dithering Mitigates Glitches in Digital-to-Analogue Converters', IEEE Transactions on Signal Processing, 68 1950-1963 (2020) [C1]
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2020 |
Raghuvanshi DS, Moore S, Fleming AJ, Yong YK, 'Electrode Configurations for Piezoelectric Tube Actuators with Improved Scan Range and Reduced Cross-Coupling', IEEE/ASME Transactions on Mechatronics, 25 1479-1486 (2020) [C1]
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2020 |
Ruppert MG, Bartlett NJ, Yong YK, Fleming AJ, 'Amplitude noise spectrum of a lock-in amplifier: Application to microcantilever noise measurements', Sensors and Actuators, A: Physical, 312 (2020) [C1]
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2020 |
McCourt LR, Ruppert MG, Routley BS, Indirathankam SC, Fleming AF, 'A comparison of gold and silver nanocones and geometry optimisation for tip-enhanced microscopy', Journal of Raman Spectroscopy, 51 2208-2216 (2020) [C1] In this article, boundary element method simulations are used to optimise the geometry of silver and gold nanocone probes to maximise the localised electric field enhancement and ... [more] In this article, boundary element method simulations are used to optimise the geometry of silver and gold nanocone probes to maximise the localised electric field enhancement and tune the near-field resonance wavelength. These objectives are expected to maximise the sensitivity of tip-enhanced Raman microscopes. Similar studies have used limited parameter sets or used a performance metric other than localised electric field enhancement. In this article, the optical responses for a range of nanocone geometries are simulated for excitation wavelengths ranging from 400 to 1000 nm. Performance is evaluated by measuring the electric field enhancement at the sample surface with a resonant illumination wavelength. These results are then used to determine empirical models and derive optimal nanocone geometries for a particular illumination wavelength and tip material. This article concludes that gold nanocones are expected to provide similar performance to silver nanocones at red and near-infrared wavelengths, which is consistent with other results in the literature. In this article, 633 nm is determined to be the shortest usable illumination wavelength for gold nanocones. Below this limit, silver nanocones will provide superior enhancement. The use of gold nanocone probes is expected to dramatically improve probe lifetime, which is currently measured in hours for silver coated probes. Furthermore, the elimination of passivation coatings is expected to enable smaller probe radii and improved topographical resolution.
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2019 |
De Rozario R, Fleming A, Oomen T, 'Finite-Time Learning Control Using Frequency Response Data with Application to a Nanopositioning Stage', IEEE/ASME Transactions on Mechatronics, 24 2085-2096 (2019) [C1]
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2019 |
Ruppert MG, Moore S, Zawierta M, Fleming AJ, Putrino G, Yong YK, 'Multimodal atomic force microscopy with optimized higher eigenmode sensitivity using on-chip piezoelectric actuation and sensing', NANOTECHNOLOGY, 30 (2019) [C1]
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2019 |
Moore S, Ruppert M, Harcombe D, Fleming A, Yong Y, 'Design and Analysis of Low-Distortion Demodulators for Modulated Sensors', IEEE/ASME Transactions on Mechatronics, 24 1861-1870 (2019) [C1]
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2019 |
Moore SI, Fleming AJ, Yong YK, 'Capacitive Instrumentation and Sensor Fusion for High-Bandwidth Nanopositioning', IEEE Sensors Letters, 3 (2019) [C1]
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2019 |
Fleming AJ, Ghalehbeygi OT, Routley BS, Wills AG, 'Scanning Laser Lithography With Constrained Quadratic Exposure Optimization', IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, 27 2221-2228 (2019) [C1]
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2018 |
Rios SA, Fleming AJ, Yong YK, 'Monolithic Piezoelectric Insect With Resonance Walking', IEEE-ASME TRANSACTIONS ON MECHATRONICS, 23 524-530 (2018) [C1]
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2018 |
Harcombe DM, Ruppert MG, Ragazzon MRP, Fleming AJ, 'Lyapunov estimation for high-speed demodulation in multifrequency atomic force microscopy', BEILSTEIN JOURNAL OF NANOTECHNOLOGY, 9 490-498 (2018) [C1]
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2018 |
Ragazzon MRP, Ruppert MG, Harcombe DM, Fleming AJ, Gravdahl JT, 'Lyapunov Estimator for High-Speed Demodulation in Dynamic Mode Atomic Force Microscopy', IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, 26 765-772 (2018) [C1]
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2018 |
Mansour SZ, Seethaler RJ, Teo YR, Yong YK, Fleming AJ, 'Piezoelectric Bimorph Actuator With Integrated Strain Sensing Electrodes', IEEE SENSORS JOURNAL, 18 5812-5817 (2018) [C1]
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2018 |
Islam MN, Fleming AJ, 'Resonance-Enhanced Coupling for Range Extension of Electromagnetic Tracking Systems', IEEE Transactions on Magnetics, 54 (2018) [C1]
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2018 |
Eielsen AA, Teo YR, Fleming AJ, 'Improving Robustness Filter Bandwidth in Repetitive Control by Considering Model Mismatch', ASIAN JOURNAL OF CONTROL, 20 1047-1057 (2018) [C1]
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2018 |
Teo YR, Yong Y, Fleming AJ, 'A COMPARISON OF SCANNING METHODS AND THE VERTICAL CONTROL IMPLICATIONS FOR SCANNING PROBE MICROSCOPY', ASIAN JOURNAL OF CONTROL, 20 1352-1366 (2018) [C1]
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2017 |
Eielsen AA, Fleming AJ, 'Improving Digital-to-Analog Converter Linearity by Large High-Frequency Dithering', IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 64 1409-1420 (2017) [C1]
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2017 |
Ghalehbeygi OT, Wills AG, Routley BS, Fleming AJ, 'Gradient-based optimization for efficient exposure planning in maskless lithography', JOURNAL OF MICRO-NANOLITHOGRAPHY MEMS AND MOEMS, 16 (2017)
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2017 |
Eielsen AA, Fleming AJ, 'Existing methods for improving the accuracy of digital-to-analog converters', REVIEW OF SCIENTIFIC INSTRUMENTS, 88 (2017) [C1]
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2017 |
Ruppert MG, Harcombe DM, Ragazzon MRP, Moheimani SOR, Fleming AJ, 'A review of demodulation techniques for amplitude-modulation atomic force microscopy', BEILSTEIN JOURNAL OF NANOTECHNOLOGY, 8 1407-1426 (2017) [C1]
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2017 |
Fleming AJ, Yong YK, 'An Ultrathin Monolithic XY Nanopositioning Stage Constructed From a Single Sheet of Piezoelectric Material', IEEE-ASME TRANSACTIONS ON MECHATRONICS, 22 2611-2618 (2017) [C1]
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2017 |
Rios SA, Fleming AJ, Yong YK, 'Miniature Resonant Ambulatory Robot', IEEE ROBOTICS AND AUTOMATION LETTERS, 2 337-343 (2017) [C1]
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2017 |
Islam MN, Fleming AJ, 'An Algorithm for Transmitter Optimization in Electromagnetic Tracking Systems', IEEE TRANSACTIONS ON MAGNETICS, 53 (2017) [C1]
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2017 |
Yong YK, Fleming AJ, 'Note: An improved low-frequency correction technique for piezoelectric force sensors in high-speed nanopositioning systems', REVIEW OF SCIENTIFIC INSTRUMENTS, 88 (2017) [C1]
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2016 |
Rios SA, Fleming AJ, 'Design of a Charge Drive for Reducing Hysteresis in a Piezoelectric Bimorph Actuator', IEEE/ASME Transactions on Mechatronics, 21 51-54 (2016) [C1] This paper describes the design of a charge drive for reducing the hysteresis exhibited by a piezoelectric bimorph bender. Existing charge drive circuits cannot be directly applie... [more] This paper describes the design of a charge drive for reducing the hysteresis exhibited by a piezoelectric bimorph bender. Existing charge drive circuits cannot be directly applied to bimorph benders since they share a common electrode. In this paper, a new charge drive circuit and electrical configuration are implemented that allows commonly available piezoelectric bimorphs to be linearized. This circuit consists of four major components, including, a high voltage amplifier, a differential amplifier, a piezoelectric load, and a PI feedback controller. An isolation amplifier was used to achieve a differential amplifier with a high common-mode rejection ratio. The charge drive was tested by driving a series poled three layer bimorph bender. The experiment showed a significant improvement to the hysteresis of the bender when compared to a typical voltage drive. This paper has identified an alternative Feedback method to improve the ac hysteresis performance of a piezoelectric bender by using a charge drive.
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2016 |
Yong YK, Wadikhaye SP, Fleming AJ, 'High speed single- and dual-stage vertical positioners', Review of Scientific Instruments, 87 (2016) [C1] This article presents a high-speed single- and dual-stage vertical positioners for applications in optical systems. Each positioner employs a unique end-constraint method with ort... [more] This article presents a high-speed single- and dual-stage vertical positioners for applications in optical systems. Each positioner employs a unique end-constraint method with orthogonal flexures to preload a piezoelectric stack actuator. This end-constraint method also significantly increases the first mechanical resonance frequency. The single-stage positioner has a displacement range of 7.6 µm and a first resonance frequency of 46.8 kHz. The dual-stage design consists of a long-range slow-stage and a short-range fast-stage. An inertial counterbalance technique was implemented on the fast-stage to cancel inertial forces resulting from high-speed motion. The dual-stage positioner has a combined travel range of approximately 10 µm and a first evident resonance frequency of 130 kHz.
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2016 |
Fleming AJ, Wills AG, Routley BS, 'Exposure Optimization in Scanning Laser Lithography', IEEE Potentials, 35 33-39 (2016) [C1] In 1959, the integrated circuit (IC) was invented simultaneously by Jack Kilby of Texas Instruments and Robert Noyce of Shockley Semiconductor [Ki lby, 2000]. This development has... [more] In 1959, the integrated circuit (IC) was invented simultaneously by Jack Kilby of Texas Instruments and Robert Noyce of Shockley Semiconductor [Ki lby, 2000]. This development has been considered one of mankind's most significant innovations.
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2016 |
Yong YK, Fleming AJ, 'High-speed vertical positioning stage with integrated dual-sensor arrangement', Sensors and Actuators, A: Physical, 248 184-192 (2016) [C1] © 2016 Elsevier B.V.This article presents a novel vertical positioning stage with a dual-sensor arrangement suitable for scanning probe microscopy. The stage has a travel range of... [more] © 2016 Elsevier B.V.This article presents a novel vertical positioning stage with a dual-sensor arrangement suitable for scanning probe microscopy. The stage has a travel range of 8.4¿µm and a first resonance frequency of 24¿kHz in the direction of travel. The sensor arrangement consists of an integrated piezoelectric force sensor and laminated piezoresistive strain sensor. The piezoelectric force sensor exhibits extremely low noise and introduces a zero into the dynamics which allows the use of integral force feedback. This control method provides excellent damping performance and guaranteed stability. The piezoresistive sensor is used for tracking control with an analog PI controller which is shown to be an approximate inverse of the damped system. The resulting closed-loop system has a bandwidth is 11.4¿kHz and 6s-resolution of 3.6¿nm, which is ideal for nanopositioning and atomic force microscopy (AFM) applications. The proposed vertical stage is used to replace the vertical axis of a commercial AFM. Scans are performed in constant-force contact mode with a tip velocity of 0.2¿mm/s, 1¿mm/s and 2¿mm/s. The recorded images contain negligible artefacts due to insufficient vertical bandwidth.
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2016 |
Teo YR, Fleming AJ, Eielsen AA, Tommy Gravdahl J, 'A Simplified Method for Discrete-Time Repetitive Control Using Model-Less Finite Impulse Response Filter Inversion', Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME, 138 (2016) [C1] Repetitive control (RC) achieves tracking and rejection of periodic exogenous signals by incorporating a model of a periodic signal in the feedback path. To improve the performanc... [more] Repetitive control (RC) achieves tracking and rejection of periodic exogenous signals by incorporating a model of a periodic signal in the feedback path. To improve the performance, an inverse plant response filter (IPRF) is used. To improve robustness, the periodic signal model is bandwidth-limited. This limitation is largely dependent on the accuracy of the IPRF. A new method is presented for synthesizing the IPRF for discrete-time RC. The method produces filters in a simpler and more consistent manner than existing best-practice methods available in the literature, as the only variable involved is the selection of a windowing function. It is also more efficient in terms of memory and computational complexity than existing methods. Experimental results for a nanopositioning stage show that the proposed method yields the same or better tracking performance compared to existing methods.
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2015 |
Rios SA, Fleming AJ, 'A new electrical configuration for improving the range of piezoelectric bimorph benders', SENSORS AND ACTUATORS A-PHYSICAL, 224 106-110 (2015) [C1]
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2015 |
Fleming AJ, Routley BS, 'A closed-loop phase-locked interferometer for wide bandwidth position sensing', Review of Scientific Instruments, 86 (2015) [C1] This article describes a position sensitive interferometer with closed-loop control of the reference mirror. A calibrated nanopositioner is used to lock the interferometer phase t... [more] This article describes a position sensitive interferometer with closed-loop control of the reference mirror. A calibrated nanopositioner is used to lock the interferometer phase to the most sensitive point in the interferogram. In this configuration, large low-frequency movements of the sensor mirror can be detected from the control signal applied to the nanopositioner and high-frequency short-range signals can be measured directly from the photodiode. It is demonstrated that these two signals are complementary and can be summed to find the total displacement. The resulting interferometer has a number of desirable characteristics: it is optically simple, does not require polarization or modulation to detect the direction of motion, does not require fringe-counting or interpolation electronics, and has a bandwidth equal to that of the photodiode. Experimental results demonstrate the frequency response analysis of a high-speed positioning stage. The proposed instrument is ideal for measuring the frequency response of nanopositioners, electro-optical components, MEMs devices, ultrasonic devices, and sensors such as surface acoustic wave detectors.
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2015 |
Russell D, Fleming AJ, Aphale SS, 'Simultaneous Optimization of Damping and Tracking Controller Parameters Via Selective Pole Placement for Enhanced Positioning Bandwidth of Nanopositioners', Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME, 137 (2015) [C1] Positive velocity and position feedback (PVPF) is a widely used control scheme in lightly damped resonant systems with collocated sensor actuator pairs. The popularity of PVPF is ... [more] Positive velocity and position feedback (PVPF) is a widely used control scheme in lightly damped resonant systems with collocated sensor actuator pairs. The popularity of PVPF is due to the ability to achieve a chosen damping ratio by repositioning the poles of the system. The addition of a tracking controller, to reduce the effects of inherent nonlinearities, causes the poles to deviate from the intended location and can be a detriment to the damping achieved. By designing the PVPF and tracking controllers simultaneously, the optimal damping and tracking can be achieved. Simulations show full damping of the first resonance mode and significantly higher bandwidth than that achieved using the traditional PVPF design method, allowing for high-speed scanning with accurate tracking. Experimental results are also provided to verify performance in implementation.
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2015 |
Yong YK, Fleming AJ, 'Piezoelectric actuators with integrated high-voltage power electronics', IEEE/ASME Transactions on Mechatronics, 20 611-617 (2015) [C1] This paper explores the possibility of piezoelectric actuators with integrated high-voltage power electronics. Such devices dramatically simplify the application of piezoelectric ... [more] This paper explores the possibility of piezoelectric actuators with integrated high-voltage power electronics. Such devices dramatically simplify the application of piezoelectric actuators since the power electronics are already optimized for the voltage range, capacitance, and power dissipation of the actuator. The foremost consideration is the thermal impedance of the actuator and heat dissipation. Analytical and finite-element methods are described for predicting the thermal impedance of a piezoelectric bender. The predictions are compared experimentally using thermal imaging on a piezoelectric bender with laminated miniature power electronics.
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2015 |
Fleming AJ, Teo YR, Leang KK, 'Low-Order Damping and Tracking Control for Scanning Probe Systems', Frontiers in Mechanical Engineering, 1 (2015) This article describes an improvement to integral resonance damping control (IRC) for reference tracking applications, such as scanning probe microscopy and nanofabrication. It is... [more] This article describes an improvement to integral resonance damping control (IRC) for reference tracking applications, such as scanning probe microscopy and nanofabrication. It is demonstrated that IRC control introduces a low-frequency pole into the tracking loop that is detrimental for performance. In this work, the location of this pole is found analytically using Cardano¿s method then compensated by parameterizing the tracking controller accordingly. This approach maximizes the closed-loop bandwidth while being robust to changes in the resonance frequencies. The refined IRC controller is comprehensively compared to other low-order methods in a practical environment.
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2015 |
Teo YR, Fleming AJ, 'Optimal integral force feedback for active vibration control', Journal of Sound and Vibration, 356 20-33 (2015) [C1] Abstract This paper proposes an improvement to Integral Force Feedback (IFF), which is a popular method for active vibration control of structures and mechanical systems. Benefits... [more] Abstract This paper proposes an improvement to Integral Force Feedback (IFF), which is a popular method for active vibration control of structures and mechanical systems. Benefits of IFF include robustness, guaranteed stability and simplicity. However, the maximum damping performance is dependent on the stiffness of the system; hence, some systems cannot be adequately controlled. In this paper, an improvement to the classical force feedback control scheme is proposed. The improved method achieves arbitrary damping for any mechanical system by introducing a feed-through term. The proposed improvement is experimentally demonstrated by actively damping an objective lens assembly for a high-speed confocal microscope.
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2014 |
Fleming AJ, 'Measuring and predicting resolution in nanopositioning systems', MECHATRONICS, 24 605-618 (2014) [C1]
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2014 |
Namavar M, Fleming AJ, Aleyaasin M, Nakkeeran K, Aphale SS, 'An Analytical Approach to Integral Resonant Control of Second-Order Systems', IEEE-ASME TRANSACTIONS ON MECHATRONICS, 19 651-659 (2014) [C1]
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2014 |
Teo YR, Russell D, Aphale SS, Fleming AJ, 'Optimal integral force feedback and structured PI tracking control: Application for objective lens positioner', Mechatronics, 24 701-711 (2014) [C1] This paper describes a new vibration damping technique based on Integral Force Feedback (IFF). Classical IFF utilizes a force sensor and integral controller to damp the resonance ... [more] This paper describes a new vibration damping technique based on Integral Force Feedback (IFF). Classical IFF utilizes a force sensor and integral controller to damp the resonance modes of a mechanical system. However, the maximum modal damping depends on the frequency difference between the system's poles and zeros. If the frequency difference is small, the achievable modal damping may be severely limited. The proposed technique allows an arbitrary damping ratio to be achieved by introducing an additional feed-through term to the control system. This results in an extra degree of freedom that allows the position of the zeros to be modified and the maximum modal damping to be increased. The second contribution of this paper is a structured PI tracking controller that is parameterized to cancel the additional pole introduced by integral force feedback. The parameterized controller has only one tuning parameter and does not suffer from reduced phase margin. The proposed techniques are demonstrated on a piezoelectric objective lens positioner. The results show exceptional tracking and damping performance while maintaining insensitivity to changes in resonance frequency. The maximum bandwidth achievable with a commercial PID controller is 26.1 Hz. In contrast, with the proposed damping and tracking controller, the bandwidth is increased to 255 Hz. © 2014 Elsevier Ltd. All rights reserved.
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2013 |
Fleming AJ, Ninness B, Wills A, 'Recovering the spectrum of a low level signal from two noisy measurements using the cross power spectral density', Review of Scientific Instruments, 84 (2013) [C1]
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2013 |
Fleming AJ, 'Charge Drive With Active DC Stabilization for Linearization of Piezoelectric Hysteresis', IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, 60 1630-1637 (2013) [C1]
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2013 |
Fleming AJ, 'A review of nanometer resolution position sensors: Operation and performance', SENSORS AND ACTUATORS A-PHYSICAL, 190 106-126 (2013) [C1]
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2013 |
Yong YK, Fleming AJ, Moheimani SOR, 'A Novel Piezoelectric Strain Sensor for Simultaneous Damping and Tracking Control of a High-Speed Nanopositioner', IEEE-ASME TRANSACTIONS ON MECHATRONICS, 18 1113-1121 (2013) [C1]
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2012 |
Fleming AJ, 'Note: A method for estimating the resolution of nanopositioning systems', Review of Scientific Instruments, 83 (2012) [C1]
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2012 |
Heltzel A, Mishra C, Ruoff RS, Fleming A, 'Analysis of an ultrathin graphite-based compact heat exchanger', Heat Transfer Engineering, 33 947-956 (2012) The emerging production of ultrathin graphite material is applied to thermal management in a numerical comparison of aluminum and graphite-based plate-fin heat exchangers. Conside... [more] The emerging production of ultrathin graphite material is applied to thermal management in a numerical comparison of aluminum and graphite-based plate-fin heat exchangers. Considering anisotropic thermal conductivity in which out-of-plane transport is about two orders of magnitude lower than in-plane values, the ultrathin graphite-based solution outperforms aluminum by rejecting up to 20% more heat on a volumetric basis. Thermal and hydraulic performance is characterized for both solutions over a range of airflow rates in a notional water/air device. Laminar through fully turbulent regimes are considered. Steady and unsteady three-dimensional (3-D) conjugate simulations reveal a faster equilibration rate for the ultrathin graphite-based solution, minimizing thermal lag that must be accounted for in on-demand electronics cooling. Fin optimization studies predict equivalent conductance with graphite at one-tenth the thickness of aluminum. The combination of improved heat rejection, rapid response rate, and low material density make an ultrathin graphite-based solution uniquely suited to aerospace thermal management. © 2012 Taylor and Francis Group, LLC.
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2012 |
Karpenko M, Bhatt S, Bedrossian N, Fleming A, Ross IM, 'First flight results on time-optimal spacecraft slews', Journal of Guidance, Control, and Dynamics, 35 367-376 (2012) [C1] This paper describes the design and flight implementation of time-optimal attitude maneuvers performed onboard NASA's Transition Region and Coronal Explorer spacecraft. Minim... [more] This paper describes the design and flight implementation of time-optimal attitude maneuvers performed onboard NASA's Transition Region and Coronal Explorer spacecraft. Minimum-time reorientation maneuvers have obvious applications for improving the agility of spacecraft systems, yet this type of capability has never before been demonstrated in flight due to the lack of reliable algorithms for generating practical optimal control solutions suitable for flight implementation. Constrained time-optimal maneuvering of a rigid body is studied first, in order to demonstrate the potential for enhancing the performance of the Transition Region and Coronal Explorer spacecraft. Issues related to the experimental flight implementation of time-optimal maneuvers onboard Transition Region and Coronal Explorer are discussed. A description of an optimal control problem that includes practical constraints such as the nonlinear reaction wheel torque-momentum envelope and rate gyro saturation limits is given. The problem is solved using the pseudospectral optimal control theory implemented in the MATLAB® software DIDO. Flight results, presented for a typical large-angle time-optimal reorientation maneuver, show that the maneuvers can be implemented without any modification of the existing spacecraft attitude control system. A clear improvement in spacecraft maneuver performance as compared with conventional eigenaxis maneuvering is demonstrated. Copyright © 2011 by Mark Karpenko, Sagar Bhatt, Nazareth Bedrossian, Andy Fleming, and I. Michael Ross.
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2012 | Fleming AJ, 'Energy optimized aircraft and equipment systems', Aerospace America, 50 71 (2012) | ||||||||||
2011 |
Kenton BJ, Fleming AJ, Leang KK, 'Compact ultra-fast vertical nanopositioner for improving scanning probe microscope scan speed', Review of Scientific Instruments, 82 (2011) [C1]
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2011 |
Fairbairn MW, Moheimani SO, Fleming AJ, 'Q control of an atomic force microscope microcantilever: A sensorless approach', Journal of Microelectromechanical Systems, 20 1372-1381 (2011) [C1]
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2011 |
Fleming AJ, 'Dual-stage vertical feedback for high-speed scanning probe microscopy', IEEE Transactions on Control Systems Technology, 19 156-165 (2011) [C1]
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2011 |
Sekhavat P, Yan H, Fleming A, Ross IM, Alfriend KT, 'Closed-loop time-optimal attitude maneuvering of magnetically actuated spacecraft', Journal of the Astronautical Sciences, 58 81-97 (2011) This paper examines the performance of the pseudospectral optimal control scheme for closed-loop time-optimal attitude maneuvering of the NPSAT1 spacecraft, a magnetically actuate... [more] This paper examines the performance of the pseudospectral optimal control scheme for closed-loop time-optimal attitude maneuvering of the NPSAT1 spacecraft, a magnetically actuated spacecraft designed and built at the Naval Postgraduate School. The closed-loop control is devised and implemented using the notion of Carathéodory-p solutions: repeated computation and update of the complete open-loop control solution in real-time. The performance of the pseudospectral feedback-control scheme is compared to a standard state feedback-control technique. It is shown that the use of standard state feedback control leads to significantly slower convergence time and may lead to substantially lower performance metrics. The substantial performance gains when using closed-loop optimal control are attributed to the optimal scheme's ability to exploit the full maneuverability envelope of the spacecraft by applying bang-bang controls in all three directions. In contrast, traditional gain-based feedback control laws substantially limit the performance of the vehicle to well below its physical capabilities. The feasibility of each open-loop optimal control solution is verified by numerical propagation while Pontryagin's necessary conditions for optimality are used to verify the solution's optimality.
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2010 |
Fleming AJ, Aphale SS, Moheimani SO, 'A new method for robust damping and tracking control of scanning probe microscope positioning stages', IEEE Transactions on Nanotechnology, 9 438-448 (2010) [C1]
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2010 |
Fleming AJ, 'Quantitative scanning probe microscope topographies by charge linearization of the vertical actuator', Review of Scientific Instruments, 81 103701 (2010) [C1]
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2010 |
Fleming AJ, Kenton BJ, Leang KK, 'Bridging the gap between conventional and video-speed scanning probe microscopes', Ultramicroscopy, 110 1205-1214 (2010) [C1]
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2010 |
Fleming AJ, Leang KK, 'Integrated strain and force feedback for high-performance control of piezoelectric actuators', Sensors and Actuators A: Physical, 161 256-265 (2010) [C1]
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2010 |
Fleming AJ, 'Nanopositioning system with force feedback for high-performance tracking and vibration control', IEEE-ASME Transactions on Mechatronics, 15 433-447 (2010) [C1]
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2010 |
Fleming AJ, Thomas SK, Yerkes KL, 'Titanium-water loop heat pipe operating characteristics under standard and elevated acceleration fields', Journal of Thermophysics and Heat Transfer, 24 184-198 (2010) An experiment has been developed to examine the behavior of a titanium-water loop heat pipe under standard and elevated acceleration fields. The loop heat pipe was mounted on a 2.... [more] An experiment has been developed to examine the behavior of a titanium-water loop heat pipe under standard and elevated acceleration fields. The loop heat pipe was mounted on a 2.44 meter-diameter centrifuge table on edge with heat applied to the evaporator via a mica heater and heat rejected using a high-temperature polyalphaolefin oil coolant loop. The loop heat pipe was tested under the following parametric ranges: heat load at the evaporator 100 = Qin = 600 W, heat load at the compensation chamber 0 = Qcc = 50 W, radial acceleration 0 = ar = 10 g. For stationary operation, the evaporative heat transfer coefficient decreased monotonically with heat load whereas the thermal resistance decreased to a minimum then increased. Heat input to the compensation chamber was found to increase the evaporative heat transfer coefficient and decrease the thermal resistance for Qin = 500 W. Transient periodic flow reversal in the loop heat pipe was found for some cases, which was likely due to vapor bubble formation in the primary wick. Operation in an elevated acceleration environment revealed that dry out was dependent on both Qin and ar, and the ability for the loop heat pipe to reprime after an acceleration event that induced dry out was influenced by the evaporator temperature. The evaporative heat transfer coefficient and thermal resistance were found not to be significantly dependent on radial acceleration. However, the evaporator wall superheat was found to increase slightly with radial acceleration at high heat loads.
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2009 |
Leang KK, Fleming AJ, 'High-speed serial-kinematic SPM scanner: Design and drive considerations', Asian Journal of Control, 11 144-153 (2009) [C1]
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2009 |
Fleming AJ, 'A megahertz bandwidth dual amplifier for driving piezoelectric actuators and other highly capacitive loads', Review of Scientific Instruments, 80 (2009) [C1]
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2009 |
Fleming AJ, Wills AG, 'Optimal periodic trajectories for band-limited systems', IEEE Transactions on Control Systems Technology, 17 552-562 (2009) [C1]
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2008 |
Wills AG, Bates DR, Fleming AJ, Ninness BM, Moheimani SO, 'Model predictive control applied to constraint handling in active noise and vibration control', IEEE Transactions on Control Systems Technology, 16 3-12 (2008) [C1]
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2008 |
Fleming AJ, Wills AG, Moheimani SO, 'Sensor fusion for improved control of piezoelectric tube scanners', IEEE Transactions on Control Systems Technology, 16 1265-1276 (2008) [C1]
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2008 |
Maess J, Fleming AJ, Allgoewer F, 'Simulation of dynamics-coupling in piezoelectric tube scanners by reduced order finite element analysis', Review of Scientific Instruments, 79 (2008) [C1]
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2008 |
Ross IM, Sekhavat P, Fleming A, Gong Q, 'Optimal feedback control: Foundations, examples, and experimental results for a new approach', Journal of Guidance, Control, and Dynamics, 31 307-321 (2008) Typical optimal feedback controls are nonsmooth functions. Nonsmooth controls raise fundamental theoretical problems on the existence and uniqueness of state trajectories. Many of... [more] Typical optimal feedback controls are nonsmooth functions. Nonsmooth controls raise fundamental theoretical problems on the existence and uniqueness of state trajectories. Many of these problems are frequently addressed in control applications through the concept of a Filippov solution. In recent years, the simpler concept of a p solution has emerged as a practical and powerful means to address these theoretical issues. In this paper, we advance the notion of Carathéodory-p solutions that stem from the equivalence between closed-loop and feedback trajectories. In recognizing that feedback controls are not necessarily closed-form expressions, we develop a sampling theorem that indicates that the Lipschitz constant of the dynamics is a fundamental sampling frequency. These ideas lead to a new set of foundations for achieving feedback wherein optimality principles are interwoven to achieve stability and system performance, whereas the computation of optimal controls is at the level of first principles. We demonstrate these principles by way of pseudospectral methods because these techniques can generate Carathéodory-p solutions at a sufficiently fast sampling rate even when implemented in a MATLAB® environment running on legacy computer hardware. To facilitate an exposition of the proposed ideas to a wide audience, we introduce the core principles only and relegate the intricate details to numerous recent references. These principles are then applied to generate pseudospectral feedback controls for the slew maneuvering of NPSAT1, a spacecraft conceived, designed, and built at the Naval Postgraduate School and scheduled to be launched in fall 2007.
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2008 |
Fleming AJ, Leang KK, 'Charge drives for scanning probe microscope positioning stages', Ultramicroscopy, 108 1551-1557 (2008) [C1]
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2008 |
Clayton GM, Tien S, Fleming AJ, Moheimani SO, Devasia S, 'Inverse-feedforward of charge-controlled piezopositioners', Mechatronics, 18 273-281 (2008) [C1]
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2007 |
Aphale SS, Fleming AJ, Moheimani SO, 'High speed nano-scale positioning using a piezoelectric tube actuator with active shunt control', Micro and Nano Letters, 2 9-12 (2007) [C1]
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2007 |
Aphale SS, Fleming AJ, Moheimani SO, 'Integral resonant control of collocated smart structures', Smart Materials & Structures, 16 439-446 (2007) [C1]
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2007 |
Fleming AJ, Niederberger D, Moheimani SO, Morari M, 'Control of resonant acoustic sound fields by electrical shunting of a loudspeaker', IEEE Transactions on Control Systems Technology, 15 689-703 (2007) [C1]
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2007 |
Bhikkaji B, Ratnam MR, Fleming AJ, Moheimani SO, 'High-performance control of piezoelectric tube scanners', IEEE Transactions on Control Systems Technology, 15 853-866 (2007) [C1]
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2007 |
Aphale SS, Fleming AJ, Moheimani SO, 'Integral control of collocated smart structures', Proceedings of SPIE, 6525 1-11 (2007) [C1]
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2006 |
Fleming AJ, Moheimani SO, 'Sensorless vibration suppression and scan compensation for piezoelectric tube nanopositioners', IEEE Transactions on Control Systems Technology, 14 33-44 (2006) [C1]
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2006 |
Fleming AJ, Behrens S, Moheimani SOR, 'Inertial vibration control using a shunted electromagnetic transducer (vol 11, pg 84, 2006)', IEEE-ASME TRANSACTIONS ON MECHATRONICS, 11 367-367 (2006)
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2006 |
Fleming AJ, Moheimani SO, 'Inertial vibration control using a shunted electromagnetic transducer', IEEE-ASME Transactions on Mechatronics, 11 84-92 (2006) [C1]
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2006 |
Niederberger D, Behrens S, Fleming AJ, Moheimani SO, Morari M, 'Adaptive electromagnetic shunt damping', IEEE-ASME Transactions on Mechatronics, 11 103-108 (2006) [C1]
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2005 |
Fleming AJ, Moheimani SOR, 'Sensor-less vibration suppression and scan compensation for piezoelectric tube nanopositioners', 2005 44th IEEE Conference on Decision and Control & European Control Conference, Vols 1-8, 1162-1167 (2005)
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2005 |
Fleming AJ, Moheimani SO, 'Control oriented synthesis of high-performance piezoelectric shunt impedances for structural vibration control', IEEE Transactions on Control Systems Technology, 13 98-112 (2005) [C1]
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2005 |
Fleming AJ, Moheimani SO, Behrens S, 'Synthesis and implementation of sensor-less active shunt controllers for electromagnetically actuated systems', IEEE Transactions on Control Systems Technology, 13 246-261 (2005) [C1]
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2005 |
Behrens S, Fleming AJ, Moheimani SO, 'Passive vibration control via electromagnetic shunt damping', IEEE-Asme Transactions on Mechatronics, 10 118-122 (2005) [C1]
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2005 |
Fleming AJ, Moheimani SO, 'A grounded-load charge amplifier for reducing hysteresis in piezoelectric tube scanners', Review of Scientific Instruments, 76 (2005) [C1]
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2004 |
Fleming AJ, Moheimani SOR, 'Optimal impedance design for piezoelectric vibration control', 2004 43RD IEEE CONFERENCE ON DECISION AND CONTROL (CDC), VOLS 1-5, 2596-2601 (2004)
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2004 |
Niederberger D, Fleming AJ, Moheimani SO, Morari M, 'Adaptive multi-mode resonant piezoelectric shunt dampening', Smart Materials and Structures, 1025-1035 (2004) [C1]
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2004 |
Moheimani SO, Fleming AJ, 'Improved current and charge amplifiers for driving piezoelectric loads, and issues in signal processing design for synthesis of shunt damping circuits', Journal of Intelligent Material Systems and Structures, 15 77-92 (2004) [C1]
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2004 |
Moheimani SO, Fleming AJ, Behrens S, 'Dynamics, stability and control of multivariable piezoelectric shunts', IEEE ASME Transactions on Mechatronics, 9 87-99 (2004) [C1]
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2003 |
Fleming AJ, Moheimani SO, 'Precision current and charge amplifiers for driving highly capacitive piezoelectric loads', Electronic Letters, 39 282-284 (2003) [C1]
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2003 |
Behrens S, Moheimani SO, Fleming AJ, 'Multiple mode current flowing passive piezoelectric shunt controller', Journal of Sound and Vibration, 266 929-942 (2003) [C1]
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2003 |
Behrens S, Fleming AJ, Moheimani SO, 'A broadband controller for shunt piezoelectric damping of structural vibration', Smart Materials and Structures, 12 18-28 (2003) [C1]
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2003 |
Fleming AJ, Moheimani SO, 'Adaptive piezoelectric shunt damping', Smart Materials and Structures, 12 36-48 (2003) [C1]
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2003 |
Fleming AJ, Behrens S, Moheimani SO, 'Reducing the inductance requirements of piezolelectric shunt dampening systems', Smart Materials and Structures, 12 57-64 (2003) [C1]
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2003 |
Moheimani SO, Fleming AJ, Behrens S, 'On the feedback structure of wideband piezoelectric shunt damping systems', Smart Materials and Structures, 12 49-56 (2003) [C1]
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2003 |
Fleming AJ, Moheimani SO, 'Spatial system identification of a simply supported beam and a trapezoidal cantilever plate', IEEE Transactions on control systems technology, 11 726-736 (2003) [C1]
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2002 |
Fleming A, Moheimani SOR, 'Spatial system identification of a simply supported beam and a trapezoidal cantilever plate.', PROCEEDINGS OF THE 41ST IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-4, 4515-4520 (2002)
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2002 |
Fleming AJ, Behrens S, Moheimani SO, 'Optimization and Implementation of Multimode Piezoelectric Shunt Damping Systems', IEEE/ASME Transactions on Mechatronics, 7 87-94 (2002) [C1]
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2002 |
McKelvey T, Fleming AJ, Moheimani SO, 'Subspace based system identification for an acoustic enclosure', Journal of Vibration and Acoustics, 124 1-16 (2002) [C1]
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2001 |
Moheimani SO, Fleming AJ, Behrens S, 'Highly resonant controller for multimode piezoelectric shunt damping', Electronic Letters, 37 No 25 1505-1506 (2001) [C1]
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2001 |
Fleming AJ, Behrens S, Moheimani SOR, 'Innovations in piezoelectric shunt damping', SMART STRUCTURES AND DEVICES, 4235 89-101 (2001)
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2001 |
Behrens S, Fleming AJ, Moheimani SOR, 'New method for multiple-mode shunt damping of structural vibration using a single piezoelectric transducer', SMART STRUCTURES AND MATERIALS 2001: DAMPING AND ISOLATION, 4331 239-250 (2001)
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2000 |
Fleming AJ, Behrens S, Moheimani SO, 'Synthetic impedance for implementation of piezoelectric shunt-damping circuits', Electronics Letters, 36, no 18 1525-1526 (2000) [C1]
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2000 |
McKelvey T, Fleming A, Moheimani SOR, 'Subspace based system identification for an acoustic enclosure', PROCEEDINGS OF THE 2000 IEEE INTERNATIONAL CONFERENCE ON CONTROL APPLICATIONS, 255-260 (2000)
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Show 117 more journal articles |
Conference (132 outputs)
Year | Citation | Altmetrics | Link | ||||||||
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2021 |
Sieswerda T, Fleming AJ, Oomen T, 'Model-free multi-variable learning control of a five axis nanopositioning stage', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Delft, Netherlands (2021) [E1]
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2021 |
Young TR, Xavier MS, Yong YK, Fleming AJ, 'A Control and Drive System for Pneumatic Soft Robots: PneuSoRD', 2021 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS (IROS), ELECTR NETWORK (2021) [E1]
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2020 |
Xavier MS, Fleming AJ, Yong YK, 'Modelling and simulation of pneumatic sources for soft robotic applications', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Boston, MA (2020) [E1]
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2020 |
Omidbeike M, Yong YK, Fleming AJ, 'Sensing and Decentralized Control of a Five-Axis Monolithic Nanopositioning Stage', IFAC PAPERSONLINE, ELECTR NETWORK (2020)
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2020 |
Bem NFSD, Ruppert MG, Yong YK, Fleming AJ, 'Integrated force and displacement sensing in active microcantilevers for off-resonance tapping mode atomic force microscopy', Proceedings of MARSS 2020: International Conference on Manipulation, Automation, and Robotics at Small Scales, Toronto, Canada (2020) [E1]
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2019 |
Omidbeike M, Yong YK, Moore SI, Fleming AJ, 'A five-axis monolithic nanopositioning stage constructed from a bimorph piezoelectric sheet', Proceedings of MARSS 2019: 4th International Conference on Manipulation, Automation, and Robotics at Small Scales, Helsinki, Finland (2019) [E1]
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2019 |
Xavier MS, Fleming AJ, Yong YK, 'Experimental Characterisation of Hydraulic Fiber-Reinforced Soft Actuators for Worm-Like Robots', 2019 IEEE 7th International Conference on Control, Mechatronics and Automation, ICCMA 2019, Delft, Netherlands (2019) [E1]
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2019 |
Ruppert MG, Routley BS, Fleming AJ, Yong YK, Fantner GE, 'Model-based Q factor control for photothermally excited microcantilevers', Proceedings of MARSS 2019: 4th International Conference on Manipulation, Automation, and Robotics at Small Scales, Helsinki, Finland (2019) [E1]
|
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2019 |
Omidbeike M, Eielsen AA, Yong YK, Fleming AJ, 'Multivariable model-less feedforward control of a monolithic nanopositioning stage with FIR Filter inversion', Proceedings of MARSS 2019: 4th International Conference on Manipulation, Automation, and Robotics at Small Scales, Helsinki, Finland (2019) [E1]
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2019 |
Harcombe DM, Ruppert MG, Fleming AJ, 'Modeling and noise analysis of a microcantilever-based mass sensor', Proceedings of MARSS 2019: 4th International Conference on Manipulation, Automation, and Robotics at Small Scales, Helsinki, Finland (2019) [E1]
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2019 |
Xavier MS, Fleming AJ, Yong YK, 'Image-guided locomotion of a pneumatic-driven peristaltic soft robot', IEEE International Conference on Robotics and Biomimetics, ROBIO 2019, Dali, China (2019) [E1]
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2018 |
Ruppert MG, Harcombe D, Moore S, Fleming A, 'Direct Design of Closed-loop Demodulators for Amplitude Modulation Atomic Force Microscopy', 2018 Annual American Control Conference (ACC), Milwaukee, WI, USA (2018) [E1]
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2018 |
Mansour SZ, Seethaler R, Fleming A, 'A simple asymmetric hysteresis model for displacement-force control of piezoelectric actuators', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Auckland, New Zealand (2018) [E1]
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2018 |
Omidbeike M, Routley B, Fleming AJ, 'Independent estimation of temperature and strain in tee-rosette piezoresistive strain sensors', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Auckland, New Zealand (2018) [E1]
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2018 |
Moore SI, Omidbeike M, Fleming A, Yong YK, 'A monolithic serial-kinematic nanopositioner with integrated sensors and actuators', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Auckland, New Zealand (2018) [E1]
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2018 |
Aphale SS, Namavar M, Fleming AJ, 'Resonance-shifting Integral Resonant Control for High-speed Nanopositioning', 2018 Annual American Control Conference (ACC), Milwaukee, Wisconsin (2018) [E1]
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2018 |
Ghalehbeygi OT, O'Connor J, Routley BS, Fleming AJ, 'Iterative Deconvolution for Exposure Planning in Scanning Laser Lithography', Proceedings of the American Control Conference, Milwaukee, Wisconsin (2018) [E1]
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2017 |
Ruppert MG, Harcombe DM, Ragazzon MRP, Moheimani SOR, Fleming AJ, 'Frequency domain analysis of robust demodulators for high-speed atomic force microscopy', Proceedings of the 2017 American Control Conference, Seattle, USA (2017) [E1]
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2017 |
Fleming AJ, Ghalehbeygi OT, Routley BS, Wills AG, 'Experimental Scanning Laser Lithography with Exposure Optimization', IFAC Proceedings Volumes (IFAC-PapersOnline), Toulouse, France (2017) [E1]
|
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2017 |
Omidbeike M, Teo YR, Yong YK, Fleming AJ, 'Tracking Control of a Monolithic Piezoelectric Nanopositioning Stage using an Integrated Sensor.', IFAC-PapersOnLine, Toulouse, France (2017) [E1]
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2017 |
Routley B, Miteff F, Fleming AJ, 'Modelling and control of nitrogen partial pressure for prophylaxis and treatment of air embolism', Proceedings of the 2017 American Control Conference, Seattle, USA (2017) [E1]
|
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2017 |
Harcombe DM, Ruppert MG, Ragazzon MRP, Fleming AJ, 'Higher-harmonic AFM Imaging with a High-Bandwidth Multifrequency Lyapunov Filter', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Munich, Germany (2017) [E1]
|
Nova | |||||||||
2017 |
Mansour SZ, Seethaler RJ, Teo YR, Yong YK, Fleming AJ, 'Piezoelectric bimorph actuator with integrated strain sensing electrodes', Proceedings of IEEE Sensors, Glasgow, Scotland (2017) [E1]
|
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2016 |
Eielsen AA, Fleming AJ, 'Improving DAC resolution in closed-loop control of precision mechatronic systems using dithering', 2016 IEEE 55th Conference on Decision and Control, CDC 2016, Las Vegas, Nevada (2016) [E1]
|
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2016 |
de Rozario R, Fleming AJ, Oomen T, 'Iterative Control for Periodic Tasks with Robustness Considerations, Applied to a Nanopositioning Stage', IFAC-PapersOnLine, Loughborough University, UK (2016) [E1]
|
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2016 |
Rios SA, Fleming AJ, Yong YK, 'Design and characterization of a miniature monolithic piezoelectric hexapod robot', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Banff, Canada (2016) [E1]
|
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2016 |
Fleming AJ, Wills A, Ghalehbeygi OT, Routley B, Ninness B, 'A Nonlinear Programming Approach to Exposure Optimization in Scanning Laser Lithography', 2016 AMERICAN CONTROL CONFERENCE (ACC), Boston, MA (2016) [E1]
|
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2016 |
Teo YR, Yong YK, Fleming AJ, 'A Review of Scanning Methods and Control Implications for Scanning Probe Microscopy', 2016 AMERICAN CONTROL CONFERENCE (ACC), Boston, MA (2016) [E1]
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2016 |
Ragazzon MRP, Gravdahl JT, Fleming AJ, 'On Amplitude Estimation for High-Speed Atomic Force Microscopy', Proceedings of the American Control Conference ACC 2016, Boston, MA (2016) [E1]
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2016 |
Fleming AJ, Berriman G, Yong YK, 'Design, Modeling, and Characterization of an XY Nanopositioning Stage Constructed from a Single Sheet of Piezoelectric Material', 2016 IEEE INTERNATIONAL CONFERENCE ON ADVANCED INTELLIGENT MECHATRONICS (AIM), Banff, CANADA (2016) [E1]
|
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2016 |
Eielsen AA, Fleming AJ, 'Experimental assessment of dynamic digital-to-analog converter performance for applications in precision mechatronic systems', 2016 Australian Control Conference, AuCC 2016, Newcastle, NSW (2016) [E1]
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Nova | |||||||||
2016 |
Routley B, Fleming A, 'High sensitivity interferometer for on-axis detection of AFM cantilever deflection', 2016 International Conference on Manipulation, Automation and Robotics at Small Scales, MARSS 2016 (2016) [E1] A homodyne path stabilised Michelson based interferometer displacement sensor was developed. This sensor achieved a noise floor of 100 fm/vHz, for frequencies higher than 100 KHz.... [more] A homodyne path stabilised Michelson based interferometer displacement sensor was developed. This sensor achieved a noise floor of 100 fm/vHz, for frequencies higher than 100 KHz. A prototype AFM that integrated this sensor was developed. Using tapping mode, topography maps of an AFM test grid were produced.
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2015 |
Teo YR, Eielsen AA, Fleming AJ, 'Model-less FIR repetitive control with consideration of uncertainty', 2015 IEEE Conference on Control and Applications, CCA 2015 - Proceedings (2015) [E1] Repetitive control (RC) is used to track and reject periodic exogenous signals by including a model of a periodic signal in the feedback path. The performance of RC can be improve... [more] Repetitive control (RC) is used to track and reject periodic exogenous signals by including a model of a periodic signal in the feedback path. The performance of RC can be improved by also including an. The accuracy of this filter is the main limitation to the RC bandwidth. The bandwidth is typically limited with a robustness filter - often a low-pass filter which attenuates the model at high-frequencies where the model-mismatch often occurs. In this paper, two robustness filter designs are compared. The first design is a brick-wall low-pass filter commonly used in the literature. The second design is based on the uncertainty between the inverse plant response filter and the measured response of the system. Experimental results demonstrate that the proposed method outperforms the traditional brick-wall filter approach.
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2015 |
Godfrey TD, Eielsen AA, Fleming AJ, IEEE, 'Digital-to-analog Converter Considerations for Achieving a Dynamic Range of 1 ppm in Precision Mechatronics Systems', 2015 IEEE CONFERENCE ON CONTROL AND APPLICATIONS (CCA 2015) (2015) [E1]
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2015 |
Fleming AJ, Routley B, Holdsworth JL, 'A closed-loop phase-locked interferometer for wide bandwidth position sensing', 2015 IEEE Conference on Control and Applications, CCA 2015 - Proceedings (2015) [E1] This article describes a position sensitive interferometer with closed-loop control of the reference mirror. A calibrated nanopositioner is used to lock the interferometer phase t... [more] This article describes a position sensitive interferometer with closed-loop control of the reference mirror. A calibrated nanopositioner is used to lock the interferometer phase to the most sensitive point in the interferogram. In this configuration, large low-frequency movements of the sensor mirror can be detected from the control signal applied to the nanopositioner and high-frequency short-range signals can be measured directly from the photodiode. It is demonstrated that these two signals are complementary and can be summed to find the total displacement. The resulting interferometer has a number of desirable characteristics, it is optically simple, does not require polarization or modulation to detect the direction of motion, does not require fringe-counting or interpolation electronics, and has an effectively unlimited bandwidth. Experimental results demonstrate the frequency response analysis of a high-speed positioning stage. The proposed instrument is ideal for measuring the frequency response of nanopositioners, electro-optical components, MEMs devices, Ultrasonic devices, and sensors such as surface acoustic wave detectors.
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2015 |
Ghalehbeygi OT, Berriman G, Fleming AJ, Holdsworth JL, IEEE, 'Optimization and Simulation of Exposure Pattern for Scanning Laser Lithography', 2015 IEEE CONFERENCE ON CONTROL AND APPLICATIONS (CCA 2015) (2015) [E1]
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2015 |
Routley BS, Holdsworth JL, Fleming AJ, 'Optimization of Near-Field Scanning Optical Lithography', ALTERNATIVE LITHOGRAPHIC TECHNOLOGIES VII, San Jose, CA (2015) [E1]
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2015 |
Rios SA, Fleming AJ, Yong YK, 'Design of a two degree of freedom resonant miniature robotic leg', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM (2015) [E1] This article identifies the design considerations for a two degree of freedom (DoF) miniature robotic leg utilizing piezoelectric bimorph actuators with a specific focus on the re... [more] This article identifies the design considerations for a two degree of freedom (DoF) miniature robotic leg utilizing piezoelectric bimorph actuators with a specific focus on the resonance modes of the system. An analytical model was developed using three independent lumped mass models with superposition for tuning the resonance frequencies and optimizing the performance of the leg. The model was verified both experimentally and using finite element analysis (FEA).
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2014 |
Islam MN, Fleming AJ, 'A Novel and Compatible Sensing Coil for a Capsule in Wireless Capsule Endoscopy for Real Time Localization', IEEE Sensors 2014 Proceedings, Valencia (2014) [E1]
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2014 |
Teo YR, Russell D, Aphale SS, Fleming AJ, 'Optimal Integral Force Feedback and Structured PI Tracking Control: Application for High Speed Confocal Microscopy', Proceedings of the 19th IFAC World Congress, Cape Town, South Africa (2014) [E1]
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Nova | |||||||||
2014 |
Russell D, Fleming AJ, Aphale SS, 'Improving the positioning bandwidth of the Integral Resonant Control Scheme through strategic zero placement', Proceedings of the 19th IFAC World Congress, Cape Town, South Africa (2014) [E1]
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2014 |
Rios SA, Fleming AJ, 'A Novel Electrical Configuration for Three Wire Piezoelectric Bimorph Micro-Positioners', 2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics AIM, Besancon, France (2014) [E1]
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2014 |
Teo YR, Fleming AJ, 'Active damping control using optimal Integral Force Feedback', Proceedings of the 2014 American Control Conference, Portland, Oregon (2014) [E1]
|
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2014 |
Russell D, Fleming AJ, Aphale SS, 'Simultaneous optimization of damping and tracking controller parameters via selective pole placement for enhanced positioning bandwidth of nanopositioners', Proceedings of the 2014 American Control Conference, Portland, Oregon (2014) [E1]
|
Nova | |||||||||
2014 |
Teo YR, Fleming AJ, 'A new repetitive control scheme based on non-causal FIR filters', Proceedings of the 2014 American Control Conference, Portland, Oregon (2014) [E1]
|
Nova | |||||||||
2014 |
Teo YR, Eielsen AA, Gravdahl TJ, Fleming AJ, 'Discrete-time repetitive control with model-less FIR filter inversion for high performance nanopositioning', 2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics AIM, Besancon, France (2014) [E1]
|
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2013 |
Teo YR, Fleming AJ, 'Resolution of sensors with capacitive source impedance', IEEE SENSORS 2013 - Proceedings, Baltimore, MD (2013) [E2]
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2013 |
Fleming AJ, Yong YK, 'Thermal Analysis of Piezoelectric Benders with Laminated Power Electronics', 2013 IEEE/ASME International Conference On Advanced Intelligent Mechatronics (AIM): Mechatronics For Human Wellbeing, Wollongong, Australia (2013) [E1]
|
Nova | |||||||||
2013 |
Fleming AJ, 'Precision Charge Drive with Low Frequency Voltage Feedback for Linearization of Piezoelectric Hysteresis', Proceedings of the 2013 American Control Conference ACC, Washington, DC (2013) [E1]
|
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2013 |
Fleming AJ, Leang KK, 'An experimental comparison of PI, inversion, and damping control for high performance nanopositioning', Proceedings of the American Control Conference, Washington, DC (2013) [E1]
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2013 |
Namavar M, Aphale SS, Fleming AJ, 'Resonance-shifting integral resonant control scheme for increasing the positioning bandwidth of nanopositioners', 2013 European Control Conference, ECC 2013, Zurich, Switzerland (2013) [E1]
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2013 |
Fleming AJ, 'Position sensor performance in nanometer resolution feedback systems', Proceedings of the 6th IFAC Symposium on Mechatronic Systems, Hangzhou, China (2013) [E1]
|
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2013 |
Fleming AJ, 'Time domain resolution of nanopositioning systems', Proceedings of the 6th IFAC Symposium on Mechatronic Systems, Zhejiang University, Hangzhou, China (2013) [E1]
|
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2013 |
Fleming AJ, Ninness B, Wills AG, 'Spectral Estimation using Dual Sensors with Uncorrelated Noise', 2013 IEEE SENSORS, Baltimore, MD (2013) [E2]
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2012 |
Fleming AJ, 'Estimating the resolution of nanopositioning systems from frequency domain data', 2012 IEEE International Conference on Robotics and Automation (ICRA), Saint Paul, MN (2012) [E1]
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2012 |
Pitis CD, Fleming A, Zeller M, 'Power savings obtained with integrated industrial system drives', SysCon 2012 - 2012 IEEE International Systems Conference, Proceedings (2012) Numerous scientific and official documents stress that energy efficiency improvements can play a key role in both assuring a sustainable energy future and mitigating climate chang... [more] Numerous scientific and official documents stress that energy efficiency improvements can play a key role in both assuring a sustainable energy future and mitigating climate change through socio-economic development. Last World Summit in Durban concluded that changing unsustainable patterns of energy use is a key area for global action to ensure the survival of our planet. This paper proposes a new Concept of five (5) Essentials of Application Engineering, (5 EAE), which would enable designers, manufacturers, and end-users to consistently design and evaluate any design or retrofits of power converters and/or industrial system drives. Five (5) essentials of application engineering have already been successful in designing and manufacturing integrated industrial system drives (IISD), and has created new basis-of-design for drives in mining and heavy industries in South Africa. 5 EAE, as a concept, produces several collateral benefits: 1) An increased technical and economic performance of processes; 2) The defusing of incipient energy and economic crisis; 3) An improvement of environmental conditions; and 4) The creation of jobs in industries. Consequently, 5 EAE can be used as a model for improving a company's corporate policies and/or utilities, and government energy policies. © 2012 IEEE.
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2011 |
Fairbairn MW, Moheimani SO, Fleming AJ, 'Passive piezoelectric shunt control of an atomic force microscope microcantilever', 2011 IEEE/ASME International Conference on Advanced Intelligent Mechatronics: AIM2011, Budapest (2011) [E1]
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2011 |
Yong YK, Fleming AJ, Moheimani SO, 'Vibration and tracking control of a flexure-guided nanopositioner using a Piezoelectric strain sensor', First International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-Nano 2011), Changchun, China (2011) [E2]
|
Nova | |||||||||
2011 |
Fairbairn MW, Moheimani SO, Fleming AJ, 'Improving the scan rate and image quality in tapping mode atomic force microscopy with piezoelectric shunt control', Proceedings of the 2011 Australian Control Conference, AUCC 2011, Melbourne, Vic (2011) [E1]
|
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2011 |
Fleming AJ, 'A method for reducing piezoelectric non-linearity in scanning probe microscope images', Proceedings of the 2011 American Control Conference, San Francisco, CA (2011) [E1]
|
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2011 |
Heltzel A, Mishra C, Ruoff RS, Fleming A, 'Analysis of a graphene/ultrathin graphite heat exchanger for aerospace thermal management', ASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011 (2011) Fast evolving techniques for macroscale graphene and ultrathin graphite material production are promising for applications of graphene-based materials in thermal management. A num... [more] Fast evolving techniques for macroscale graphene and ultrathin graphite material production are promising for applications of graphene-based materials in thermal management. A numerical comparison of aluminium and graphene-based plate-fin heat exchangers is conducted. Anisotropic thermal conductivity of graphene-based solution shows an improvement of up to twenty percent in heat rejection over the aluminium design. Thermal and hydraulic performance is characterized for both designs over a range of air flow rates in both laminar and turbulent regimes. Steady and unsteady 3-D conjugate simulations reveal a faster equilibration rate for the graphene-based solution, minimizing thermal lag that must be accounted for in on-demand electronics cooling. The combination of improved heat rejection, rapid response rate, and low material density make a graphene-based solution uniquely suited to aerospace thermal management. Copyright © 2011 by ASME. |
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2011 |
Karpenko M, Bedrossian N, Bhatt S, Fleming A, Ross IM, 'First flight results on time-optimal spacecraft slews', Advances in the Astronautical Sciences (2011) This paper describes the design and flight implementation of off-eigenaxis time-optimal reorientation maneuvers for the NASA Transition Region and Coronal Explorer (TRACE) spacecr... [more] This paper describes the design and flight implementation of off-eigenaxis time-optimal reorientation maneuvers for the NASA Transition Region and Coronal Explorer (TRACE) spacecraft. Time-optimal reorientation maneuvers have obvious application for improving the maneuver performance of spacecraft systems. Yet, this type of maneuvering capability has never before been demonstrated in flight. Constrained time-optimal maneuvering of a rigid body is studied first in order to demonstrate the potential for enhancing the performance of the TRACE spacecraft. Issues related to the experimental flight implementation of time-optimal maneuvers on board TRACE are discussed. A description of an optimal control problem formulation found to be suitable for reaction wheel spacecraft maneuver design is given. The optimizationmodel is solved using the pseudospectral optimal controlmethod and includes practical constraints such as the nonlinear reaction wheel torque-momentum envelope and rate gyro saturation limits. Flight results, presented for a typical large angle time-optimal reorientation maneuver, show that time-optimal maneuvers can be implemented without any modification of the existing spacecraft attitude control system and demonstrate a clear improvement in spacecraft maneuver performance as compared to conventional eigenaxis maneuvering.
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2011 |
Karpenko M, Bhatt S, Bedrossian N, Fleming A, Ross IM, 'Flight implementation of pseudospectral optimal control for the TRACE space telescope', AIAA Guidance, Navigation, and Control Conference 2011 (2011) [E1] This paper presents the application of pseudospectral optimal control techniques for solving time-optimal reorientation maneuvers and their implementation on the NASA space telesc... [more] This paper presents the application of pseudospectral optimal control techniques for solving time-optimal reorientation maneuvers and their implementation on the NASA space telescope TRACE. A time-optimal reorientation maneuver is designed by first deriving a constrained optimal control problem formulation from models of the TRACE spacecraft dynamics and reaction wheel-based attitude control system. A detailed flight simulation model of the TRACE spacecraft is constructed to assist in this process. The resulting optimal control problem is then solved using fast spectral algorithms. Both simulation results and telemetry data obtained from a flight experiment show that the designed timeoptimal maneuver adheres to the specified constraints, including the nonlinear reaction wheel torque-momentum envelope and other limitations imposed by on board sensors. Moreover, the time-optimal maneuver was implemented on orbit without the need to modify the existing spacecraft attitude control system, making the approach suitable for application to other spacecraft already on orbit. © 2011 by M. Karpenko, S. Bhatt, N. Bedrossian, A. Fleming, I.M. Ross. Published by the American Institute of Aeronautics and Astronautics, Inc.
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2010 |
Eielsen AA, Fleming AJ, 'Passive shunt damping of a piezoelectric stack nanopositioner', 2010 American Control Conference, ACC 2010, Baltimore, MD (2010) [E1]
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2010 |
Fleming AJ, 'High speed nanopositioning with force feedback', 2010 American Control Conference, ACC 2010, Baltimore, MD (2010) [E1]
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2010 |
Fleming AJ, Kenton BJ, Leang KK, 'Ultra-fast dual-stage vertical positioning for high performance SPMs', 2010 American Control Conference, ACC 2010, Baltimore, MD (2010) [E1]
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2010 |
Kuiper S, Fleming AJ, Schitter G, 'Dual actuation for high speed atomic force microscopy', 5th IFAC Symposium on Mechatronic Systems, Cambridge, MA (2010) [E1]
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2010 |
Fleming AJ, Leang KK, 'High performance nanopositioning with integrated strain and force feedback', 5th IFAC Symposium on Mechatronic Systems, Cambridge, MA (2010) [E1]
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2010 |
Fleming A, Sekhavat P, Ross IM, 'Constrained, minimum-time maneuvers for CMG actuated spacecraft', Advances in the Astronautical Sciences (2010) We address the time-optimal reorientation of a spacecraft with control moment gyros (CMGs) as the torque generating devices. The rigid-body solutions are inapplicable for a CMG-dr... [more] We address the time-optimal reorientation of a spacecraft with control moment gyros (CMGs) as the torque generating devices. The rigid-body solutions are inapplicable for a CMG-driven spacecraft due to the strong coupling between the actuator dynamics and the rigid-body equations. No assumptions are made with regards to the eigenaxis being the optimal axis for slewing. In sharp contrast to the rigid-body system, singular arcs occur quite naturally in the CMG-driven system. Solutions are computed using recent results from optimal control theory and pseudospectral methods. Our computed solutions are practically implementable in that we incorporate limits on the gimbal accelerations. The state space of the resulting optimal control problem is in R15. Necessary conditions for this optimal control problem are derived and the extremality of the computed solution is demonstrated by way of Pontryagin's Principle. A key discovery of our analysis is the strong connection between CMG sizing and jerk limits.
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2010 |
Fleming AJ, Thomas SK, Yerkes KL, 'Titanium-water loop heat pipe operating characteristics under standard and elevated acceleration fields', 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition (2010) An experiment has been developed to examine the behavior of a titanium-water loop heat pipe (LHP) under standard and elevated acceleration fields. The LHP was mounted on a 2.44 m ... [more] An experiment has been developed to examine the behavior of a titanium-water loop heat pipe (LHP) under standard and elevated acceleration fields. The LHP was mounted on a 2.44 m diameter centrifuge table on edge with heat applied to the evaporator via a mica heater and heat rejected using a high-temperature polyalphaolefin oil (PAO) coolant loop. The LHP was tested under the following parametric ranges: heat load at the evaporator, 100 = Qin = 600 W; heat load at the compensation chamber, 0 = Q cc = 50 W; radial acceleration, 0 = ar = 10 g. For stationary operation, the evaporative heat transfer coefficient decreased monotonically with heat load while the thermal resistance decreased to a minimum then increased. Heat input to the compensation chamber was found to increase the evaporative heat transfer coefficient and decrease the thermal resistance for Qin = 500 W. Transient periodic flow reversal in the LHP was found for some cases, which was likely due to vapor bubble formation in the primary wick. Operation in an elevated acceleration environment revealed that dry-out was dependent on both Qin and ar, and the ability for the LHP to reprime after an acceleration event that induced dry-out was influenced by the evaporator temperature. The evaporative heat transfer coefficient and thermal resistance were found not to be significantly dependent on radial acceleration. However, the evaporator wall superheat was found to increase slightly with radial acceleration at high heat loads.
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2010 |
Fleming AJ, 'The AFRL/RZPS centrifuge table test facility', U.S. Air Force T and E Days 2010 (2010) The Centrifuge Table Test Facility in the Propulsion Directorate of the Air Force Research Laboratory at Wright-Patterson Air Force Base has a long history of providing critical k... [more] The Centrifuge Table Test Facility in the Propulsion Directorate of the Air Force Research Laboratory at Wright-Patterson Air Force Base has a long history of providing critical knowledge of the response of two-phase heat transfer systems to changing accelerations in aerospace applications. This paper will discuss the centrifuge table facility, a review of literature produced using the facility, the importance of two-phase fluid systems subjected to varying accelerations, and the capabilities and limitations of the centrifuge table. The test bed consists of a 2.44 m diameter horizontal rotating table driven by a 20 hp DC electric motor. The test bed can deliver the following to devices mounted to the rotating table: Conditioned DC electrical power through three separate power supplies, 120 VAC power, temperature-controlled ethylene glycol coolant, and electrical signals for analog or digital control. In addition, electrical signals are collected from instruments on the table and stored in a data acquisition computer. The table is capable of radial acceleration up to a r = 12 g, with a maximum onset of ¿r = 10 g/s, inducing a tangential acceleration. The table rotation can be varied manually using a potentiometer, or controlled digitally using a signal generator in the data acquisition and control system. The acceleration field is measured using an orthogonal triaxial accelerometer.
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2010 |
Fleming A, Sekhavat P, Ross IM, 'Minimum-time reorientation of a rigid body', Journal of Guidance, Control, and Dynamics (2010) Recent advances in optimal control theory and computation are used to develop minimum-time solutions for the rest-to-rest reorientation of a generic rigid body. It is shown that t... [more] Recent advances in optimal control theory and computation are used to develop minimum-time solutions for the rest-to-rest reorientation of a generic rigid body. It is shown that the differences in the geometry of the inertia ellipsoid and the control space lead to counterintuitive noneigenaxis maneuvers. The optimality of the open-loop solutions are verified by an application of Pontryagin's principle as a necessary condition and not as a problem-solving tool. It is shown that the nonsmoothness of the lower Hamiltonian compounds the curse of dimensionality associated in solving the Hamilton-Jacobi-Bellman equations for feedback solutions. These difficulties are circumvented by generating Carathéodory-jr trajectories, which are based on the fundamental notion that a closed loop does not necessarily imply closed-form solutions. While demonstrating the successful implementation of the proposed method for practical applications, these closed-loop results reveal yet another counterintuitive phenomenon: a suggestion that parameter uncertainties may aid the optimality of the maneuver rather than hinder it. Copyright © 2009 by the American Institute of Aeronautics and Astronautics, Inc.
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2009 |
Fleming AJ, 'High-speed vertical positioning for contact-mode atomic force microscopy', 2009 IEEE/ASME International Conference on Advanced Intelligent Mechatronics. Proceedings, Singapore (2009) [E1]
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2009 |
Fleming AJ, Aphale SS, Moheimani SO, 'A new robust damping and tracking controller for SPM positioning stages', Proceedings of the American Control Conference, St Louis, MO (2009) [E1]
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2009 |
Fleming AJ, 'Time-domain adaptive feed-forward control of nanopositioning systems with periodic inputs', Proceedings of the American Control Conference, St Louis, MO (2009) [E1]
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2009 |
Fleming A, Sekhavat P, Ross IM, 'On the minimum-time reorientation of a rigid body', AIAA Guidance, Navigation, and Control Conference and Exhibit (2009) Recent advances in optimal control theory and computation are used to develop minimumtime solutions for the rest-to-rest reorientation of a generic rigid-body. It is shown that th... [more] Recent advances in optimal control theory and computation are used to develop minimumtime solutions for the rest-to-rest reorientation of a generic rigid-body. It is shown that the differences in the geometry of the inertia ellipsoid and the control space lead to counterintuitive non-eigenaxis maneuvers. The optimality of the open-loop solutions are verified by an application of Pontryagin's Principle as a necessary condition and not as a problemsolving tool. It is shown that the nonsmoothness of the lower Hamiltonian compounds the curse of dimensionality associated in solving the Hamilton-Jacobi-Bellman equations for feedback solutions. These difficulties are circumvented by generating arathéodory-p trajectories which are based on the fundamental notion that closed-loop does not necessarily imply closed-form solutions. While demonstrating the successful implementation of the proposed method for practical applications, these closed-loop results reveal yet another counter-intuitive phenomenon: a suggestion that parameter uncertainties may aid the optimality of the maneuver rather than hinder it. Copyright © 2009 by the American Institute of Aeronautics and Astronautics, Inc.
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2008 |
Aphale SS, Fleming AJ, Moheimani SO, 'A second-order controller for resonance damping and tracking control of nanopositioning systems', Proceedings ICAST 2008: 19th International Conference on Adaptive Structures and Technologies, Ascona, Switzerland (2008) [E2]
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2008 |
Fleming AJ, 'Techniques and considerations for driving piezoelectric actuators at high-speed', Proceedings of SPIE: The International Society for Optical Engineering, San Diego, CA (2008) [E2]
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2008 |
Fleming AJ, Wills AG, 'Optimal input signals for bandlimited scanning systems', Proceedings of the 17th World Congress of the International Federation of Automatic Control, Seoul, Korea (2008) [E1]
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2008 |
Aphale SS, Fleming AJ, Moheimani SOR, 'A second-order controller for resonance damping and tracking control of nanopositioning systems', 19th International Conference on Adaptive Structures and Technologies 2008, ICAST 2008 (2008) This paper presents a simple second-order controller that damps the resonance typical of piezoelectric nanopositioners and delivers good tracking performance. This method employs ... [more] This paper presents a simple second-order controller that damps the resonance typical of piezoelectric nanopositioners and delivers good tracking performance. This method employs the Integral Resonant Control scheme (IRC) for damping the dominant resonant mode of the piezoelectric nanopositioner and uses an integral controller to achieve tracking performance. As disturbance rejection is a main concern in nanopositioning applications, the control scheme is tested for its disturbance rejection performance. It is seen that the control scheme has good disturbance rejection characteristics deeming it suitable for nanopositioning applications. To test the tracking performance, the system is made to track a 20 Hz triangular input at various integral gains. It is shown that improved tracking performance can be achieved at high gains with only a slight degradation in disturbance rejection performance at high frequencies.
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2008 |
Leang KK, Fleming AJ, 'High-speed serial-kinematic AFM scanner: Design and drive considerations', Proceedings of the American Control Conference 2008, Seattle, Washington (2008) [E1]
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2008 |
Fleming A, Ross IM, 'Minimum-time maneuvering of CMG-driven spacecraft', Advances in the Astronautical Sciences (2008) Since the inception of optimal control theory, minimum-time solutions have been sought for various problems as they provide the foundations for understanding the dynamics of the c... [more] Since the inception of optimal control theory, minimum-time solutions have been sought for various problems as they provide the foundations for understanding the dynamics of the control system. In space applications, rapid maneuvering capabilities are inherently vital to both civilian and military needs. In this paper, we address the time-optimal reorientation of a spacecraft with control moment gyros (CMGs) as the torque generating devices. No assumptions are made with regards to the eigenaxis being the optimal axis for slewing. In addition to its attitude and attitude rates, the state-space of a CMG-driven spacecraft includes the gimbal positions. Taking gimbal rates as the control variables, the coupled non-Eulerian dynamics are fully exploited to formulate and solve the true minimum-time attitude maneuvering problem. Solutions are obtained using recent results from optimal control theory and pseudospectral methods. In sharp contrast to the rigid-body system, singular arcs occur quite naturally in the CMG-driven system. The extremality of the solution is demonstrated by way of Pontryagin's Principle.
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2008 |
Fleming A, Sekhavat P, Ross IM, 'Minimum-time reorientation of an asymmetric rigid body', AIAA Guidance, Navigation and Control Conference and Exhibit (2008) Minimum-time solutions are developed for the rest-to-rest reorientation of an asymmetric rigid-body. The optimality of the open-loop solutions are demonstrated by application of P... [more] Minimum-time solutions are developed for the rest-to-rest reorientation of an asymmetric rigid-body. The optimality of the open-loop solutions are demonstrated by application of Pontryagin's Minimum Principle. Bellman's theory is used to further demonstrate optimality while extending open-loop theory to real-time application. The open-loop time optimal control is, next, used to construct the closed-loop Carathéodory-p control solution for a similar maneuver. Closed-loop results presented for the system with and without parameter uncertainties verify the successful implementation of the method in practical applications. © 2008 by A. Fleming, P. Sekhavat, I.M. Ross.
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2008 |
Fleming A, Ross IM, 'Optimal control of spinning axisymmetric spacecraft: A pseudospectral approach', AIAA Guidance, Navigation and Control Conference and Exhibit (2008) Shen and Tsiotras considered the case where the axisymmetric rigid body was subject to only two control torques which spanned the plane perpendicular to the axis of symmetry. They... [more] Shen and Tsiotras considered the case where the axisymmetric rigid body was subject to only two control torques which spanned the plane perpendicular to the axis of symmetry. They used a cascaded computational scheme which involved both direct and indirect methods of optimization. Additionally, their method required initial costate guesses which further complicated numerical results. They concluded that two torques were sufficient to achieve a time-optimal maneuver. In this work the Legendre Pseudospectral method will be used to solve the two-torque problem with only a two-point guess to demonstrate the method's superiority. Additionally, it will be demonstrated that while reorientation of the spin axis is possible with two control torques spanning the plane perpendicular to the spin axis, the addition of a third control torque about the axis of symmetry further reduces the objective function. It will be shown that this new solution has significantly different characteristics form the previously published work. © 2008 by Andrew Fleming.
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2008 |
Homitz J, Scaringe RP, Cole GS, Fleming A, Michalak T, 'Comparative analysis of thermal management architectures to address evolving thermal requirements of aircraft systems', SAE Technical Papers (2008) Recent advances in aircraft technology have raised much concern over the manner in which aircraft thermal management is carried out. These advances range from the incorporation of... [more] Recent advances in aircraft technology have raised much concern over the manner in which aircraft thermal management is carried out. These advances range from the incorporation of high-power electronics to transporting thermal loads at high temperatures. These types of technological advances have brought about a necessity for new aircraft thermal management architectures in order to maintain reasonable cost, size, weight, and power requirements of the overall system. The objective of this study is to address the requirements and performance aspects of existing system configurations in an effort to identify inefficiencies and highlight potential areas for improvement. As a result of this study, a new aircraft thermal management architecture, which can best be described as a vapor-compression thermal bus, is proposed as a replacement for existing technology. This paper will present the findings of a thermodynamic analysis that compares the requirements and performance aspects of existing architectures to those of the vapor-compression thermal bus. Copyright © 2008 SAE International.
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2008 |
Fleming AJ, Leang KK, 'Evaluation of charge drives for scanning probe microscope positioning stages', Proceedings of the American Control Conference 2008, Seattle, Washington (2008) [E1]
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2008 |
Maess J, Fleming AJ, Allgower F, 'Model-based vibration suppression in piezoelectric tube scanners through induced voltage feedback', Proceedings of the American Control Conference 2008, Seattle, Washington (2008) [E1]
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2007 |
Aphale SS, Moheimani SO, Fleming AJ, 'Dominant resonant mode damping of a piezoelectric tube nanopositioner using optimal sensorless shunts', American Control Conference, 2007. ACC '07. proceedings, New York (2007) [E1]
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2007 |
Aphale SS, Fleming AJ, Moheimani SOR, 'Integral resonant control of collocated smart structures', SMART MATERIALS AND STRUCTURES (2007) [E4]
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2007 |
Clayton GM, Tien S, Fleming AJ, Moheimani SO, Devasia S, 'Hysteresis and Vibration Compensation in Piezoelectric Actuators by Integrating Charge Control and Inverse Feedforward', Preprints of the 4th IFAC-Symposium on Mechatronic Systems, Heidelberg, Germany (2007) [E1]
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2007 |
Aphale SS, Fleming AJ, Moheimani SO, 'Integral control of smart structures with collocated sensors and actuators', Proceedings of the European Control Conference 2007, Kos, Greece (2007) [E1]
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2007 |
Maess J, Fleming AJ, Allgoewer F, 'Simulation of piezoelectric tube actuators by reduced finite element models for controller design', 2007 AMERICAN CONTROL CONFERENCE, VOLS 1-13, New York, NY (2007)
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2007 |
Maess J, Fleming AJ, Allgower F, 'Simulation of piezolectric tube actuators by reduced finite element models for controller design', Proceedings of the 2007 American Control Conference, New York (2007) [E1]
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2007 |
Fleming AJ, Wills AG, Moheimani SO, 'Sensor fusion for improved control of piezoelectric tube scanners', 2007 IEEE/ASME International Conference on Advanced Intelligent Mechatronics. Proceedings, Zurich, Switzerland (2007) [E1]
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2007 |
Aphale SS, Moheimani SOR, Fleming AJ, 'Dominant resonant mode damping of a piezoelectric tube nanopositioner using optimal sensorless shunts', 2007 AMERICAN CONTROL CONFERENCE, VOLS 1-13, New York, NY (2007) [E1]
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2007 |
Bhikkaji B, Ratnam MR, Fleming AJ, Moheimani SO, 'High-Performance Control of a PZT Scanner', Preprints of the 4th IFAC-Symposium on Mechatronic Systems, Heidelberg, Germany (2007) [E1]
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2007 |
Aphale SS, Moheimani SO, Fleming AJ, 'Optimal Sensorless Shunts for Vibration Damping of a Piezoelectric Tube Nanopositioner', Proceedings of the 17th International Conference on Adaptive Structures and Technologies, Taipei, Taiwan (2007) [E2]
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2006 |
Fleming AJ, Moheimani SO, 'Proof-Mass Inertial Vibration Control Using a Shunted Electromagnetic Transducer', Proceedings of 16th IFAC World Congress, Prague, Czech Republic (2006) [E1]
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2006 |
Fleming AJ, Niederberger D, Moheimani SO, Morari M, 'Mitigation of acoustic resonance using electrically shunted loudspeakers', Proceedings of the Society of Photo-Optical Instrumentation Engineers: Smart Structures and Materials 2006: Damping and Isolation, San Diego, CA (2006) [E2]
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2006 |
Fleming A, Ross IM, 'Singularity-free optimal steering of control moment gyros', Advances in the Astronautical Sciences (2006) Research on the attitude control of spacecraft using control moment gyros (CMGs) has been largely dominated by singularity avoidance. In this paper, we show that the singularity p... [more] Research on the attitude control of spacecraft using control moment gyros (CMGs) has been largely dominated by singularity avoidance. In this paper, we show that the singularity problem disappears if the control is properly identified in terms of the actuator inputs rather than the torques on the spacecraft body. Under this formulation, the spacecraft can now be properly steered. Although any optimality criterion may be used for steering, we choose time-optimality as it a fundamental problem in both control theory and spacecraft attitude maneuvering. Results for a small spacecraft based on the parameters of NPSAT1 demonstrate the details of our approach.
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2006 |
Ross IM, Sekhavat P, Fleming A, Gong Q, 'Pseudospectral feedback control: Foundations, examples and experimental results', Collection of Technical Papers - AIAA Guidance, Navigation, and Control Conference 2006 (2006) Suppose optimal open-loop controls could be computed in real time. This implies optimal feedback control. These controls are, typically, nonsmooth, Nonsmooth controls raise fundam... [more] Suppose optimal open-loop controls could be computed in real time. This implies optimal feedback control. These controls are, typically, nonsmooth, Nonsmooth controls raise fundamental theoretical problems on the existence and uniqueness of feedback solutions. A simple, yet powerful, approach to address these theoretical issues is the concept of a p-solution that is closely linked to the practical implementation of zero-order-hold control sampling. In other words, even traditional feedback controls involve open-loop controls through the process of sampling. In this paper, we advance the notion of Carathéodory-p solutions that use the sampling intervals to compute optimal open-loop controls. A sampling theorem is developed which indicates that the Lipschitz constant of the dynamics is a fundamental sampling frequency. This places computation at the level of first principles in describing the foundations for achieving feedback. We obtain these controls by way of pseudospectral (PS) methods as these techniques can generate optimal open-loop controls within fractions of a second even when implemented in a MATLAB© environment running on legacy computer hardware. In order to facilitate an exposition of the proposed ideas to a wide audience, we introduce the core principles only while relegating the Intricate details to numerous recent references. These principles are then applied to generate PS feedback controls for the slew maneuvering of NFSAT1, a spacecraft conceived, designed and built at the Naval Postgraduate School and scheduled to be launched in Fall 2007.
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2006 |
Fleming AJ, Leland QH, Yerkes KL, Elston LJ, Thomas SK, 'Aircraft thermal management using loop heat pipes: Experimental simulation of high acceleration environments using the centrifuge table test bed', SAE Technical Papers (2006) The objective of this paper is to describe the design of an experiment that will examine the effects of elevated acceleration environments on a high-temperature, titanium-water lo... [more] The objective of this paper is to describe the design of an experiment that will examine the effects of elevated acceleration environments on a high-temperature, titanium-water loop heat pipe for actuator cooling. An experimental test setup has been designed for mounting a loop heat pipe on an 8-ft-diameter centrifuge table, which is capable of radial accelerations of up to 12-g's. A high-temperature PAO loop will interface the condenser of the loop heat pipe to simulate the rejection of the transported heat to an elevated temperature. In addition to LHP experimentation, a mathematical model has been developed for aerodynamic heating of highspeed aircraft. A flat plate at zero-incidence, used to model an aircraft wing, was subjected to sub- and supersonic flow to examine whether heat will be rejected or absorbed. The results of this analysis will be used to determine the condenser conditions of the loop heat pipe during centrifuge testing. Copyright © 2006 SAE International.
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2006 |
Elston LJ, Yerkes KL, Fleming AJ, Thomas SK, 'Centrifuge testing of a partially-confined FC-72 spray', SAE Technical Papers (2006) The effects of elevated acceleration fields on spray cooling heat transfer are discussed in this paper. Spray cooling has proven to be one of the most efficient methods of heat re... [more] The effects of elevated acceleration fields on spray cooling heat transfer are discussed in this paper. Spray cooling has proven to be one of the most efficient methods of heat removal. This technology is being transitioned into more advanced applications, such as fighter aircraft that must withstand a wide range of variable acceleration-induced body forces. Heat transfer associated with closed-loop spray cooling will be affected by acceleration body forces, the extent of which is not yet known. To test these various effects, an eight-foot-diameter centrifuge table will be outfitted with a spray cooling system to test for the effects associated with elevated gravity. Copyright © 2006 SAE International.
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2005 |
Wills AG, Bates DR, Fleming AJ, Ninness BM, Moheimani SO, 'Application of MPC to an Active Structure Using Sampling Rates up To 25kHz', Proceedings of the 44th IEEE Conference On Decision And Control, Seville, Spain (2005) [E1]
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2005 |
Fleming AJ, Moheimani SO, 'Senor-less Vibration Suppression and Scan Compensation for Piezoelectric Tube Nanopositioners (invited paper)', Proceedings of the 44th IEEE Conference on Decision and Control, and the European Control Conference 2005, Seville, Spain (2005) [E1]
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2005 |
Ratnam M, Bhikkaji B, Fleming AJ, Moheimani SO, 'PPF Control of a Piezoelectric Tube Scanner (invited paper)', Proceedings of the 44th IEEE Conference on Decision and Control, and the European Control Conference 2005, Seville, Spain (2005) [E1]
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2005 |
Yan H, Fleming A, Ross IM, Alfriend KT, 'Real-time computation of time-optimal magnetic attitude control', Advances in the Astronautical Sciences (2005) Magnetic actuators have been used for momentum dumping and attitude control in many spacecraft. Of late, magnetic actuators have also been proposed as a sole means for attitude co... [more] Magnetic actuators have been used for momentum dumping and attitude control in many spacecraft. Of late, magnetic actuators have also been proposed as a sole means for attitude control, particularly for small inexpensive spacecraft. In this paper, we investigate the use of magnetic actuators for the time-optimal slew maneuver using a spectral algorithm implemented in the reusable software package, DIDO. The parameters of the example problem correspond to that of NPSATI, a small satellite being built at the Naval Postgraduate School, and due to launch in January 2006. Numerical experiments reveal that real-time optimal solutions can be easily obtained.
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2005 |
Sekhavat P, Fleming A, Ross IM, 'Time-optimal nonlinear feedback control for the NPSAT1 spacecraft', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM (2005) NPSAT1 is a small satellite being built at the Naval Postgraduate School, and due to launch in January 2006. It uses magnetic actuators and a pitch momentum wheel for attitude con... [more] NPSAT1 is a small satellite being built at the Naval Postgraduate School, and due to launch in January 2006. It uses magnetic actuators and a pitch momentum wheel for attitude control. In this paper, a novel time-optimal sampled-data feedback control algorithm is introduced for closed-loop control of NPSAT1 in the presence of disturbances. The feedback law is not analytically explicit; rather, it is obtained by a rapid re-computation of the open-loop time-optimal control at each update instant. The implementation of the proposed controller is based on a shrinking horizon approach and does not require any advance knowledge of the computation time. Preground-test simulations show that the proposed control scheme performs well in the presence of parameter uncertainties and external disturbance torques. © 2005 IEEE.
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2004 |
Fleming AJ, Moheimani SO, 'Hybrid DC accurate charge amplifier for linear piezoelectric positioning', Mechatronic Systems 2004, A Proceedings Volume from the 3rd IFAC Symposium, Sydney (2004) [E1]
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2004 |
Niederberger D, Fleming AJ, Moheimani SO, Morari M, 'Online-tuned multi-mode resonant piezoelectric shunt for broadband vibration suppression', Mechatronic Systems 2004, A Proceedings Volume from the 3rd IFAC Symposium, Sydney (2004) [E1]
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2004 |
Behrens S, Fleming AJ, Moheimani SO, 'Negative inductor-resistor controller for electromagnetic shunt damping', Mechatronic Systems 2004, A Proceedings Volume from the 3rd IFAC Symposium, Sydney (2004) [E1]
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2004 |
Behrens S, Fleming AJ, Moheimani SOR, 'Control orientated synthesis of electromagnetic shunt impedances for vdbration isolation', IFAC Proceedings Volumes (IFAC-PapersOnline) (2004) A typical passive mechanical isolation system utilizes a mass-spring-damper as a mechanical filter. Active isolation control systems typically include an electromagnetic transduce... [more] A typical passive mechanical isolation system utilizes a mass-spring-damper as a mechanical filter. Active isolation control systems typically include an electromagnetic transducer to develop the required control forces. In this paper, the technique of sensor-less active shunt control is applied to a mechanical isolation system. An electrical impedance is designed and connected to an electromagnetic transducer with a view to minimizing structural vibration. Standard control tools can be applied to design the required shunt impedance. The technique requires no additional feedback sensors. Vibration of an experimental isolation apparatus is heavily attenuated by the application of an active shunt impedance.
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2004 |
Behrens S, Fleming AJ, Moheimani SO, 'Control orientated synthesis of electromagnetic shunt impedances for vibration isolation', CD ROM, Sydney (2004) [E1]
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2004 |
Behrens S, Fleming AJ, Moheimani SO, 'Vibration isolation using a shunted electromagnetic transducer', Conference Paper, San Diego California USA (2004) [E2]
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2004 |
Fleming AJ, Moheimani SO, 'Synthesis of optimal piezoelectric shunt impedances for structural vibration control', Conference Paper, San Diego California USA (2004) [E2]
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2003 |
Behrens S, Fleming AJ, Moheimani SOR, 'Electromagnetic shunt damping', PROCEEDINGS OF THE 2003 IEEE/ASME INTERNATIONAL CONFERENCE ON ADVANCED INTELLIGENT MECHATRONICS (AIM 2003), VOLS 1 AND 2, KOBE, JAPAN (2003)
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2003 |
Fleming AJ, Behrens S, Moheimani SO, 'Active LQR and H2 shunt control of electromagnetic transducers', Proceedings for CDC 2003 (CD ROM), Maui, Hawaii, USA (2003) [E1]
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2003 |
Behrens S, Fleming AJ, Moheimani SO, 'Electrodynamic Vibration Suppression', Proceedings of SPIE, San Diego, California (2003) [E2]
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2003 |
Fleming AJ, Moheimani SO, 'Improved current and charge amplifiers for driving piezoelectric loads', Proceedings of SPIE, San Diego, California (2003) [E2]
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2003 |
Behrens S, Fleming AJ, Moheimani SO, 'Robust passive Piezoelectric Shunt Dampener', Proceedings of SPIE, San Diego, California (2003) [E2]
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2003 |
Fleming AJ, Behrens S, Moheimani SO, 'An Autonomous Piezoelectric Shunt Damping System', Proceedings of SPIE, San Diego, California (2003) [E2]
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2002 |
Moheimani SO, Behrens S, Fleming AJ, 'Dynamics and Stability of Wideband Vibration Absorbers with Multiple Piezoelectric Transducers', 15th Triennial World Congress, Barcelona, Spain (2002) [E1]
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2002 |
Behrens S, Moheimani SO, Fleming AJ, 'Multiple Mode Passive Piezoelectric Shunt Dampener', Mechatronic Systems, Berkeley, California, USA (2002) [E1]
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2002 |
Fleming AJ, Moheimani SO, 'The Effect of Artificially Reducing the Size of Inductors in Piezoelectric Shunt Damping Circuits', Mechatronic Systems, Berkeley, California, USA (2002) [E1]
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2002 |
Fleming AJ, Moheimani SO, 'Power Harvesting Piezoelectric Shunt Damping', Mechatronic Systems, Berkeley, California, USA (2002) [E1]
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2002 |
Behrens S, Fleming AJ, Moheimani SO, 'Series-Parallel Impedance Structure for Piezoelectric Vibration Damping', Proceedings of SPIE - Smart Materials II, Melbourne, Australia (2002) [E1]
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2002 |
Fleming AJ, Moheimani SO, 'Adaptive Piezoelectric Shunt Damping', Smart Structures and Materials 2002: Damping and Isolation, San Diego, USA (2002) [E1]
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2002 |
Moheimani SO, Fleming AJ, Behrens S, 'On the Feedback Structure of Wideband Piezoelectric Shunt Damping Systems', 15th Triennial World Congress, Barcelona, Spain (2002) [E1]
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2000 |
McKelvey T, Fleming AJ, Moheimani SO, 'Subspace based system identification for an acoustic enclosure', Proceedings of IEEE International Conference on Control Applications & IEEE International Symposium on Computer-Aided Control Systems Design, Alaska, USA (2000) [E1]
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2000 |
Fleming AJ, Behrens S, Moheimani SO, 'A New Approach to Piezoelectric Shunt Damping', Proceedings of IS3M 2000 Symposium, Hong Kong (2000) [E1]
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Show 129 more conferences |
Other (5 outputs)
Year | Citation | Altmetrics | Link |
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2013 | Rios SA, Fleming AJ, 'Systems and Methods for Driving Piezoelectric Benders', (2013) | ||
2012 | Fleming AJ, 'Charge Drive with Active DC Stabilization', (2012) | ||
2010 | Fleming AJ, 'A Positioning System and Method', (2010) | ||
Show 2 more others |
Thesis / Dissertation (1 outputs)
Year | Citation | Altmetrics | Link |
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2004 | Fleming AJ, Synthesis and implementation of sensor-less shunt controllers for piezoelectric and electromagnetic vibration control, (2004) |
Grants and Funding
Summary
Number of grants | 38 |
---|---|
Total funding | $15,689,770 |
Click on a grant title below to expand the full details for that specific grant.
20222 grants / $282,000
Advanced Controllers for Espresso Machines$176,000
Funding body: Breville Pty Ltd
Funding body | Breville Pty Ltd |
---|---|
Project Team | Doctor Michael Ruppert, Professor Andrew Fleming, Associate Professor Yuen Yong |
Scheme | Research Grant |
Role | Investigator |
Funding Start | 2022 |
Funding Finish | 2023 |
GNo | G2200737 |
Type Of Funding | C3100 – Aust For Profit |
Category | 3100 |
UON | Y |
Development of an accurate biological test for the monitoring and assessment of occupational dust inhalation in high dust industries$106,000
Funding body: The University of Newcastle Research Associates Ltd (TUNRA)
Funding body | The University of Newcastle Research Associates Ltd (TUNRA) |
---|---|
Project Team | Professor Jay Horvat, Professor Andrew Fleming, Doctor Dusan Ilic, Mr Prabhasha Jayasundara, Doctor Jemma Mayall |
Scheme | Scholarships |
Role | Investigator |
Funding Start | 2022 |
Funding Finish | 2025 |
GNo | G2101352 |
Type Of Funding | Scheme excluded from IGS |
Category | EXCL |
UON | Y |
20213 grants / $464,933
Subsurface Atomic Force Microscopy using Dual Probes$221,496
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Andrew Fleming, Doctor Michael Ruppert, Associate Professor Yuen Yong, A/Prof Hamed Sadeghian |
Scheme | Discovery Projects |
Role | Lead |
Funding Start | 2021 |
Funding Finish | 2023 |
GNo | G2000139 |
Type Of Funding | C1200 - Aust Competitive - ARC |
Category | 1200 |
UON | Y |
Femtoliter Liquid Deposition Facility$183,437
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Andrew Fleming, Doctor Michael Ruppert, Associate Professor Yuen Yong, Associate Professor Ajay Karakoti, A/Pro Dzung Dao, A/Pro Dzung Dao, Dr Van Dau, Dr Van Dau, Dr Yong Zhu, Dr Yong Zhu, Prof Giacinta Parish, Prof Giacinta Parish, Dr Gino Putrino, Dr Gino Putrino, Prof Brett Nener, Prof Brett Nener |
Scheme | Linkage Infrastructure Equipment & Facilities (LIEF) |
Role | Lead |
Funding Start | 2021 |
Funding Finish | 2021 |
GNo | G2000395 |
Type Of Funding | Scheme excluded from IGS |
Category | EXCL |
UON | Y |
Advanced controllers for Espresso Machines$60,000
Funding body: Breville Pty Ltd
Funding body | Breville Pty Ltd |
---|---|
Project Team | Associate Professor Yuen Yong, Professor Andrew Fleming, Doctor Michael Ruppert, Mr Hassan Jajai |
Scheme | Research Grant |
Role | Investigator |
Funding Start | 2021 |
Funding Finish | 2021 |
GNo | G2100878 |
Type Of Funding | C3100 – Aust For Profit |
Category | 3100 |
UON | Y |
20201 grants / $39,000
Soft ray robot for reef surveys$39,000
Funding body: CSIRO - Commonwealth Scientific and Industrial Research Organisation
Funding body | CSIRO - Commonwealth Scientific and Industrial Research Organisation |
---|---|
Project Team | Professor Andrew Fleming, Associate Professor Yuen Yong, David Howard, Mr Matheus Dos Santos Xavier |
Scheme | Postgraduate Scholarship |
Role | Lead |
Funding Start | 2020 |
Funding Finish | 2022 |
GNo | G2001209 |
Type Of Funding | C2100 - Aust Commonwealth – Own Purpose |
Category | 2100 |
UON | Y |
20192 grants / $813,000
A femtosecond laser micromachining facility for a wide range of materials$438,783
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Nam-Trung Nguyen, Dzung Dao, Yong Zhu, Muhammad J. A. Shiddiky, Porun Liu, Han Huang, Ming-Xing Zhang, Cheng Yan, Yuantong Gu, John Bell, Andrew Fleming, Yuen Yong, Michael Ruppert |
Scheme | Linkage-Infrastructure, Equipment and Facilities Grant |
Role | Investigator |
Funding Start | 2019 |
Funding Finish | 2019 |
GNo | |
Type Of Funding | External |
Category | EXTE |
UON | N |
A femtosecond laser micromachining facility for a wide range of materials$374,217
Funding body: Collaborating Organisation Cash Contribution
Funding body | Collaborating Organisation Cash Contribution |
---|---|
Project Team | Nam-Trung Nguyen, Dzung Dao, Yong Zhu, Muhammad J. A. Shiddiky, Porun Liu, Han Huang, Ming-Xing Zhang, Cheng Yan, Yuantong Gu, John Bell, Andrew Fleming, Yuen Yong, Michael Ruppert |
Scheme | ARC LIEF |
Role | Investigator |
Funding Start | 2019 |
Funding Finish | 2019 |
GNo | |
Type Of Funding | External |
Category | EXTE |
UON | N |
20181 grants / $667
Vice-Chancellor's Award for Research Supervision Excellence$667
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Vice-Chancellor's Award for Research Supervision Excellence |
Role | Lead |
Funding Start | 2018 |
Funding Finish | 2018 |
GNo | G1701605 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20171 grants / $41,433
UON 2017 Researcher Equipment Grant $41,433
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Researcher Equipment Grants |
Role | Lead |
Funding Start | 2017 |
Funding Finish | 2017 |
GNo | G1701156 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20163 grants / $379,000
Facility for Nanometer Scale Microscopy, Characterization, and Fabrication$194,000
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming, Conjoint Professor Rob Atkin, Professor Erica Wanless, Dr Stuart Prescott, Professor Robert Melchers, Associate Professor John Holdsworth, Patrick Cullen, Associate Professor Patrick Spicer, Cullen, Dr Patrick, Prescott, Dr Stuart, Spicer, A/Prof Patrick |
Scheme | Equipment Grant |
Role | Lead |
Funding Start | 2016 |
Funding Finish | 2016 |
GNo | G1500390 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
Facility for Nanometer Scale Microscopy, Characterization, and Fabrication$155,000
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Andrew Fleming, Conjoint Professor Rob Atkin, Associate Professor John Holdsworth, Professor Robert Melchers, Professor Erica Wanless, Patrick Cullen, Dr Stuart Prescott, Associate Professor Patrick Spicer, Cullen, Dr Patrick, Prescott, Dr Stuart, Spicer, A/Prof Patrick |
Scheme | Linkage Infrastructure Equipment & Facilities (LIEF) |
Role | Lead |
Funding Start | 2016 |
Funding Finish | 2016 |
GNo | G1500603 |
Type Of Funding | Scheme excluded from IGS |
Category | EXCL |
UON | Y |
Facility for Nanometer Scale Microscopy, Characterization, and Fabrication$30,000
Funding body: University of New South Wales
Funding body | University of New South Wales |
---|---|
Project Team | Professor Andrew Fleming, Conjoint Professor Rob Atkin, Associate Professor John Holdsworth, Professor Robert Melchers, Professor Erica Wanless, Patrick Cullen, Dr Stuart Prescott, Associate Professor Patrick Spicer, Cullen, Dr Patrick, Prescott, Dr Stuart, Spicer, A/Prof Patrick |
Scheme | Linkage Infrastructure Equipment & Facilities (LIEF) Partner Funding |
Role | Lead |
Funding Start | 2016 |
Funding Finish | 2016 |
GNo | G1600873 |
Type Of Funding | Scheme excluded from IGS |
Category | EXCL |
UON | Y |
20153 grants / $300,518
Atomic Resolution Sensors for Imaging and Metrological Science$275,518
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Discovery Projects |
Role | Lead |
Funding Start | 2015 |
Funding Finish | 2017 |
GNo | G1400362 |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | Y |
VESPA$15,000
Funding body: Calvary Mater Newcastle
Funding body | Calvary Mater Newcastle |
---|---|
Project Team | Conjoint Professor Peter Greer, Associate Professor John Holdsworth, Professor Andrew Fleming, Dr Joerg Lehmann, Miss Narges Miri |
Scheme | Project Grant |
Role | Investigator |
Funding Start | 2015 |
Funding Finish | 2015 |
GNo | G1500770 |
Type Of Funding | Contract - Aust Non Government |
Category | 3AFC |
UON | Y |
VESPA project$10,000
Funding body: TROG (Trans Tasman Radiation Oncology Group)
Funding body | TROG (Trans Tasman Radiation Oncology Group) |
---|---|
Project Team | Conjoint Professor Peter Greer, Associate Professor John Holdsworth, Professor Andrew Fleming, Dr Joerg Lehmann |
Scheme | Research Grant |
Role | Investigator |
Funding Start | 2015 |
Funding Finish | 2015 |
GNo | G1401525 |
Type Of Funding | Grant - Aust Non Government |
Category | 3AFG |
UON | Y |
20142 grants / $68,919
DVC(R) Research Support for Future Fellow (FT13)$58,979
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Future Fellowship Support |
Role | Lead |
Funding Start | 2014 |
Funding Finish | 2017 |
GNo | G1301413 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
2014 International Visitor from Norwegian University of Science and Technology, Norway$9,940
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming, Doctor Arnfinn Eielsen |
Scheme | International Research Visiting Fellowship |
Role | Lead |
Funding Start | 2014 |
Funding Finish | 2014 |
GNo | G1400875 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20132 grants / $786,320
Integrated Piezoelectric Microsystems for Actuation and Sensing$784,820
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Future Fellowships |
Role | Lead |
Funding Start | 2013 |
Funding Finish | 2017 |
GNo | G1300028 |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | Y |
American Control Conference, Washington DC, USA, 17 - 19 June 2013$1,500
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2013 |
Funding Finish | 2013 |
GNo | G1300882 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20123 grants / $356,500
Probe based nano-fabrication of micro-electronic and mechanical systems$340,000
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Andrew Fleming, Emeritus Professor John O'Connor |
Scheme | Discovery Projects |
Role | Lead |
Funding Start | 2012 |
Funding Finish | 2014 |
GNo | G1100209 |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | Y |
A Miniature Interferometer for Sub-Nanometer Position Sensing over Long Distances$15,000
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Pilot Grant |
Role | Lead |
Funding Start | 2012 |
Funding Finish | 2012 |
GNo | G1200349 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
Actuator 2012, Bremen, Germany, 18 - 20 June 2012$1,500
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2012 |
Funding Finish | 2013 |
GNo | G1200766 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20111 grants / $1,500
American Control Conference, San Francisco, California, 29/6/2011 - 1/7/2011$1,500
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2011 |
Funding Finish | 2012 |
GNo | G1100312 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20094 grants / $1,301,500
Electron Microscopes for Nanometer-scale Imaging/Microanalysis in the Materials, Biological, Physical, Engineering and Chemical Sciences$650,000
Funding body: ARC (Australian Research Council)
New drives and control techniques for high performance piezoelectric actuation$580,000
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Discovery Projects |
Role | Lead |
Funding Start | 2009 |
Funding Finish | 2013 |
GNo | G0188750 |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | Y |
Electron Microscopes for Nanometer-scale Imaging/Microanalysis in the Materials, Biological, Physical, Engineering and Chemical Sciences$70,000
Funding body: ARC (Australian Research Council)
IEEE/ASME Advanced Intelligent Mechatronics, Singapore, 14-17 July$1,500
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2009 |
Funding Finish | 2009 |
GNo | G0190429 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20084 grants / $9,993,584
Centre for Complex Dynamic Systems and Control$9,648,000
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Emeritus Laureate Professor Graham Goodwin, Professor Minyue Fu, Professor Reza Moheimani, Doctor Julio Braslavsky, Dr GREG Adams, Associate Professor Jose De Dona, Associate Professor Maria Seron, Associate Professor James Welsh, Professor Andrew Fleming, Associate Professor Tristan Perez, Doctor Damian Marelli, Associate Professor Brailey Sims, Conjoint Professor Kerrie Mengersen, Professor A Pettitt, Dr R Reeves, Professor Ian Turner, Dr Salvatore Crisafulli, Dr M Downey, Mr J Lee, Mr P Stone, Conjoint Professor John Rayner |
Scheme | ARC Centres of Excellence |
Role | Investigator |
Funding Start | 2008 |
Funding Finish | 2010 |
GNo | G0188623 |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | Y |
Centre for Complex Dynamic Systems and Control$323,084
Funding body: NSW Department of State and Regional Development
Funding body | NSW Department of State and Regional Development |
---|---|
Project Team | Emeritus Laureate Professor Graham Goodwin, Professor Minyue Fu, Professor Reza Moheimani, Doctor Julio Braslavsky, Dr GREG Adams, Associate Professor Jose De Dona, Associate Professor Maria Seron, Associate Professor James Welsh, Professor Andrew Fleming, Doctor Damian Marelli, Associate Professor Brailey Sims, Conjoint Professor Kerrie Mengersen, Professor A Pettitt, Dr R Reeves, Professor Ian Turner, Dr Salvatore Crisafulli, Dr M Downey, Mr J Lee, Mr P Stone |
Scheme | ARC Centres of Excellence Partner Funding |
Role | Investigator |
Funding Start | 2008 |
Funding Finish | 2010 |
GNo | G0189187 |
Type Of Funding | Other Public Sector - State |
Category | 2OPS |
UON | Y |
Reduction of Creep, Hysteresis and Temperature Drift in Piezoelectric Actuators$20,000
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming, Doctor Mehmet Yuce |
Scheme | Near Miss Grant |
Role | Lead |
Funding Start | 2008 |
Funding Finish | 2008 |
GNo | G0188415 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
SPIE Smart Structure and Materials 2008, San Diego, CA 9/3/2008 - 13/3/2008$2,500
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2008 |
Funding Finish | 2008 |
GNo | G0188556 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20062 grants / $833,996
Nano-positioning facility for nano-scale measurement and manipulation$530,000
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Reza Moheimani, Scientia Professor Ian Petersen, Emeritus Laureate Professor Graham Goodwin, Emeritus Professor Rick Middleton, Professor Minyue Fu, Dr Valeri Ougrinovska, Dr Hermanshu Pota, Professor Andrew Fleming, Dr Steven Schofield |
Scheme | Linkage Infrastructure Equipment & Facilities (LIEF) |
Role | Investigator |
Funding Start | 2006 |
Funding Finish | 2006 |
GNo | G0185548 |
Type Of Funding | Scheme excluded from IGS |
Category | EXCL |
UON | Y |
Analysis, Optimization, and Control of Scanning Atomic Force Microscope Micro-Cantilever Probes$303,996
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Discovery Projects |
Role | Lead |
Funding Start | 2006 |
Funding Finish | 2008 |
GNo | G0185309 |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | Y |
20051 grants / $2,500
The 44th Annual IEEE Conference on Decision and Control, 12-15 December 2005$2,500
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2005 |
Funding Finish | 2005 |
GNo | G0185867 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20042 grants / $14,400
Scanning Tunnelling Microscope with sub-Nanometer Resolution$12,000
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Early Career Researcher Grant |
Role | Lead |
Funding Start | 2004 |
Funding Finish | 2004 |
GNo | G0185009 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
IEEE Conference on Decision and Control, 14-17 December 2004, Bahamas$2,400
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2004 |
Funding Finish | 2004 |
GNo | G0184838 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
1 grants / $10,000
High Speed Nanopositioning with Nanometer Resolution$10,000
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Professor Andrew Fleming |
Scheme | Linkage Pilot Research Grant |
Role | Lead |
Funding Start | |
Funding Finish | |
GNo | G1100664 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
Research Supervision
Number of supervisions
Current Supervision
Commenced | Level of Study | Research Title | Program | Supervisor Type |
---|---|---|---|---|
2024 | PhD | Micro-Cantilever Probe Design for Subsurface Atomic Force Microscopy | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2024 | PhD | Dual Probe Atomic Force Microscopy for Imaging Below the Surface of Semiconductors | PhD (Computer Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2022 | PhD | Development of an Accurate Biological Test for the Monitoring and Assessment of Occupational Dust Inhalation in High Dust Industries | PhD (Immunology & Microbiol), College of Health, Medicine and Wellbeing, The University of Newcastle | Co-Supervisor |
2020 | PhD | Soft Robotic Devices for Biomedical Applications | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
Past Supervision
Year | Level of Study | Research Title | Program | Supervisor Type |
---|---|---|---|---|
2023 | PhD | Design, Modeling, Fabrication and Control of Fluid-Driven Bioinspired Soft Actuators and Robots | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2023 | PhD | Design, Fabrication and Characterisation of Improved Tip-Enhanced Raman Spectroscopy Probes | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2023 | PhD | Active Cantilever with Integrated Actuation and Sensing for Use in Off-Resonance Tapping AFM | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2021 | PhD | Design, Sensing and Control of Monolithic Nanopositioning Devices | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2020 | PhD | High-speed Demodulation in Multifrequency Atomic Force Microscopy | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2019 | PhD | EPID-based Dosimetry for Remote Auditing of Radiotherapy Clinical Trials | PhD (Physics), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2018 | PhD | Exposure Planning for Scanning Laser Lithography | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2018 | PhD | Real Time Endoscope Capsule Localization Using the Electromagnetic Field Method | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2018 | Masters | Novel Actuation Techniques for Piezoelectric Tube Actuators | M Philosophy(Elec Engineering), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2017 | PhD | Damping and Tracking Controllers for Nanopositioning Systems: Applications for High-Speed Scanning Probe Microscopy | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2017 | PhD | Miniature Ambulatory Robots Driven by Piezoelectric Bimorph Benders: Design, Drive and Control Methods | PhD (Electrical Engineering), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
Research Projects
Miniature Monolithic Piezoelectric Robot 2013 - 2017
The project aims to design, fabricate and test a prototype miniature resonant ambulatory robot that uses piezoelectric actuators to achieve locomotion.
Grants
Bio-inspired robots: Design of a Fast Walking Insect Using Variable Compliant Structure
Funding body: Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
Funding body | Faculty of Engineering and Built Environment - The University of Newcastle (Australia) |
---|---|
Scheme | FEBE Strategic Pilot Grant |
Publications
Rios SA, Fleming AJ, Yong YK, 'Design of a two degree of freedom resonant miniature robotic leg', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM (2015) [E1]
Rios SA, Fleming AJ, Yong YK, 'Design and characterization of a miniature monolithic piezoelectric hexapod robot', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Banff, Canada (2016) [E1]
Students
Program | Research Title |
---|---|
PhD College of Engineering, Science and Environment |
Miniature Ambulatory Robots Driven by Piezoelectric Bimorph Benders: Design, Drive and Control Methods |
Collaborators
Name | Organisation |
---|---|
Professor Andrew John Fleming | University of Newcastle |
Edit
News
News • 28 Jun 2021
Double ARC Grants for the Precision Mechatronics Lab
The Precision Mechatronics Lab was successful in receiving a 2021 ARC DP and a 2021 ARC LIEF grant.
News • 13 Nov 2020
University of Newcastle secures over $6 million in ARC funding
The Australian Research Council (ARC) has awarded the University of Newcastle more than $6 million in competitive research funding through its Discovery Projects and Linkage Projects schemes.
News • 27 Nov 2018
ARC Funding Success - Precision Mechatronics Lab
Prof Andrew Fleming, A/Prof Yuen Yong and Dr Michael Ruppert from the Precision Mechatronics Lab contributed to securing a $438,000 ARC Linkage Infrastructure Equipment & Facilities (LIEF) grant for A femtosecond laser micromachining facility for a wide range of materials at the University of Griffith.
News • 28 Nov 2016
Batterham Medal awarded to UON engineering innovator
Dr Andrew Fleming has been awarded the 2016 Batterham Medal by the Academy of Technology and Engineering (ATSE) at an award ceremony in Melbourne.
News • 5 Nov 2015
ARC Linkage Infrastructure, Equipment and Facilities (LIEF) funding success 2016
Associate Professor Andrew Fleming, Professor Rob Atkin, Professor Erica Wanless, Dr Stuart Prescott, Professor Robert Melchers, Dr John Holdsworth, Dr Patrick Cullen and Associate Professor Patrick Spicer have been awarded $440,000 in ARC Linkage Infrastructure, Equipment and Facilities (LIEF) funding commencing in 2016 for a Facility for Nanometer Scale Microscopy, Characterization, and Fabrication.
News • 19 Nov 2014
ARC Discovery Project funding success
Dr Andrew Fleming has been awarded more than $266,000 in ARC Discovery Project funding commencing in 2015 for his research project Atomic Resolution Sensors for Imaging and Metrological Science.
News • 8 Nov 2013
$8.8M ARC funding
The Australian Research Council (ARC) has today awarded $8.8 million in Discovery Project research funding to the University of Newcastle. The funding will extend across 19 projects, an increase of 6 projects and $4.2 million since last year.
Professor Andrew Fleming
Position
Professor
School of Engineering
College of Engineering, Science and Environment
Focus area
Electrical and Computer Engineering
Contact Details
andrew.fleming@newcastle.edu.au | |
Phone | (02) 4921 6493 |
Mobile | (02) 4921 7223 |
Fax | (02) 4960 1712 |
Link | Personal webpage |
Office
Room | EAG29 |
---|---|
Building | Engineering A Building |
Location | Callaghan University Drive Callaghan, NSW 2308 Australia |