Dr Julio Braslavsky

Conjoint Senior Lecturer

School of Elect Engineering and Computer Science (Electrical and Computer Engineering)

Career Summary

Biography

Julio Braslavsky has been a researcher in the field of control systems theory since 1996, working with world-class groups in the field at the University of Newcastle and The University of California, Santa Barbara, USA. Braslavsky has made substantial contributions to the theory of performance limitations in filtering and control systems, on which he has coauthored the book. His main contributions include the following specific areas: Networked control systems. Braslavsky and coworkers developed a new framework based on signal-to-noise ratio constrains for the analysis of control systems with feedback over communication channels. In contrast to alternative approaches, the proposed framework provides simpler solutions to a restricted but important class of problems while establishing direct links with well-known analysis and design tools in control systems theory. Sampled-data control systems. Braslavsky and coworkers have developed a frequency domain lifting approach to sampled-data systems, which was instrumental in capturing intersample information to give the first definitive analysis of robustness and sensitivity tradeoffs in these systems. Another significant contribution in this area was the derivation of a new, rigorous proof of the Poisson sampling formula to discretise an analog system. Nonlinear control systems. Braslavsky and coworkers developed the optimal cheap control approach to first quantitatively characterise design limitations in nonlinear systems and link them to Bode integrals. Dr Braslavsky and coworker also established conditions under which global or semi-global stabilisation is impossible for a class of cascade systems, and has also collaborated in the robustification of bakstepping design and design tradeoffs in nonminimum phase systems. Optimal filtering. Braslavsky and coworkers developed a filtering version of the cheap control approach to analyse limiting performance of Kalman filters and draw links between Bode integrals and Wiener filtering problems. Between 2003 and 2010, as part of his work for the ARC Centre for Complex Dynamic Systems and Control (CDSC) at The University of Newcastle, Braslavsky was project leader and later programme leader of CDSC Industry Programme on Process Control and Optimisation, jointly funded by the ARC, BHP Billiton Innovation and Matrikon. In November 2010 Braslavsky joined CSIRO Energy Technology as a Senior Scientific Researcher, where he works on modelling and control in power and energy systems, remaining as a Conjoint Senior Lecturer with the University of Newcastle.

Research Expertise
Braslavsky's most extensive experience is in the field of control systems theory, working in a number of areas including: energy management, fundamental design limitations in filtering and control design, nonlinear systems, sampled-data control systems, system identification. Braslavsky has also experience in systems and control engineering research collaboration with industry, substantially in applications in energy technology and mineral exploration and extraction.

Teaching Expertise
Undergraduate courses in control systems analysis and design: internal model control and state space control methods. Graduate courses in optimal and nonlinear control systems. Short course on performance limitations in filtering and control. Lectures on technical writing and professional communication, document typesetting with LaTeX. Modelling and control intensive courses for industry.

Administrative Expertise
Currently Associate editor for IEEE Transactions on Automatic Control, and IET Control Theory and Applications; formerly Associate Editor for the Jornal of Latin American Applied Research 2003-2007. Currently Program Leader for Industrial Control and Optimisation for the ARC Centre of Excellence for Complex Dynamic Systems and Control. Regular reviewer for the top journals in systems and control, including Automatica, the IEEE Transactions on Automatic Control, and System and Control Letters. Grant assessor (Intreader) for the Australian Research Council.

Collaborations
Current research interests include switched control systems, energy management, optimal control and networked control systems.


Qualifications

  • PhD, University of Newcastle
  • Electronic Engineer Degree - Equivalent Masters, University of Rosario - Argentina

Keywords

  • Electrical Engineering
  • Mathematical Modelling
  • Networked control systems
  • Nonlinear control systems
  • Optimal control
  • Sampled-data control systems
  • System identification
  • Systems and Control Theory

Languages

  • Spanish (Fluent)

Fields of Research

CodeDescriptionPercentage
090699Electrical and Electronic Engineering not elsewhere classified100

Professional Experience

UON Appointment

DatesTitleOrganisation / Department
20/02/2009 - 26/11/2010Research AcademicUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia
16/07/2007 - 29/11/2007Casual AcademicUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia
1/04/1999 - 30/06/1999Lecturer - Elect & Comp EngUniversity of Newcastle
Engineering
Australia

Academic appointment

DatesTitleOrganisation / Department
1/01/2010 - Editorial Board - Institution of Electrical and Electronic Engineers, Transactions on Automatic ControlInstitution of Electrical and Electronic Engineers, Transactions on Automatic Control
Australia
1/01/2010 - 31/12/2011Conference Chair - Australian Control Conference Australian Control Conference
Australia
1/01/2007 - 31/12/2010Editorial Board - Institution of Engineering and Technology, Control Theory and Applications (International Journal)Institution of Engineering and Technology, Control Theory and Applications (International Journal)
Australia
1/01/2003 - 31/12/2007Editorial Board - Latin American Applied Research (International Journal)Latin American Applied Research (International Journal)
United States
1/11/2001 - 1/03/2004Research Fellow (Investigador Adjunto)National Council for Scientific and Technological Research (CONICET)
Argentina
1/11/2001 - 1/03/2004Research FellowNational Council of Scientific and Technological Research
Argentina
1/07/1999 - 1/07/2002Associate ProfessorNational University of Quilmes
Department of Science and Technology
Argentina
1/03/1998 - 1/07/1999Research AcademicUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia
1/03/1998 - 1/07/1999Research AcademicUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia
1/01/1997 - 1/01/1998Visiting ResearcherThe University of California, Santa Barbara
United States
1/09/1996 - 1/12/1996Postdoctoral FellowCatholic University of Louvain, Louvain-la-Neuve
Centre for Systems Engineering, Automatics and Applied Mechanics
Belgium
1/10/1995 - 1/08/1996Research AssociateUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia

Professional appointment

DatesTitleOrganisation / Department
1/11/2010 - Senior Research ScientistCommonwealth Scientific and Industrial Research Organisation (CSIRO)
Energy Technology

Invitations

Participant

YearTitle / Rationale
1997Short course:
Organisation: Division of Automatic Control, Department of Electrical Engineering, Linkooping University, Sweden Description: Invitation to give a two-day course based on the Springer-Verlag research monography, then recently published, which Braslavsky coauthored with Seron and Goodwin.
1997Short course: "Fundamental limitations in filterign and control"
Organisation: Center for Control Engineering and Computation, University of California, Santa Barbara Description: Invitation to give a two-day course based on the Springer-Verlag research monography, then recently published, which Braslavsky coauthored with Seron and Goodwin.
1996Short course: "Fundamental limitations in filterign and control"
Organisation: Centre for Systems Engineering, Automatics and Applied Mechanics, Catholic University of Louvain Description: Invitation to give a two-day course based on the Springer-Verlag research monography, then recently published, which Braslavsky coauthored with Seron and Goodwin.
1996Short course:
Organisation: Automatic Control Division, Royal Institute of Technology, Stockholm Description: Invitation to give a two-day course based on the Springer-Verlag research monography, then recently published, which Braslavsky coauthored with Seron and Goodwin.
1996Short course: "Fundamental limitations in filterign and control"
Organisation: Department of automatic Control, Lund Institute of Technology Description: Invitation to give a two-day course based on the Springer-Verlag research monography, then recently published, which Braslavsky coauthored with Seron and Goodwin.
Edit

Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Book (1 outputs)

YearCitationAltmetricsLink
1997Seron MM, Braslavsky JH, Goodwin GC, Fundamental Limitations in Filtering and Control, Springer-Verlag (1997) [A1]
Co-authorsMaria Seron

Journal article (31 outputs)

YearCitationAltmetricsLink
2015Stüdli S, Crisostomi E, Middleton R, Braslavsky J, Shorten R, 'Distributed load management using additive increase multiplicative decrease based techniques', Power Systems, 89 173-202 (2015)

Due to the expected increase in penetration levels of Plug-in Electric Vehicles (PEVs), the demand on the distribution power grid is expected to rise significantly during PEV charging. However, as PEV charging in many cases may not be time critical, they are suitable for load management tasks where the power consumption of PEVs is controlled to support the grid. Additionally, PEVs may also be enabled to inject power into the grid to lower peak demand or counteract the influence of intermittent renewable energy generation, such as that produced by solar photovoltaic panels. Further, PEV active rectifiers can be used to balance reactive power in a local area if required, to reduce the necessity for long distance transport of reactive power. To achieve these objectives, we adapt a known distributed algorithm, Additive Increase Multiplicative Decrease, to control both the active and reactive power consumption and injection. Here, we present this algorithm in a unified framework and illustrate the flexibility of the algorithm to accommodate different user objectives. We illustrate this with three scenarios, including a domestic scenario and a workplace scenario. In these scenarios the various objectives allow us to define a type of ¿fairness¿ for how the PEVs should adapt their power consumption, i.e. equal charging rates, or charging rates based on energy requirements. We then validate the algorithms by simulations of a simple radial test network. The simulations presented use the power simulation tool OpenDSS interlinked with MATLAB.

DOI10.1007/978-981-287-302-6_7
Co-authorsRichard Middleton
2014Perfumo C, Braslavsky JH, Ward JK, 'Model-Based Estimation of Energy Savings in Load Control Events for Thermostatically Controlled Loads', IEEE TRANSACTIONS ON SMART GRID, 5 1410-1420 (2014) [C1]
DOI10.1109/TSG.2014.2298840Author URL
2013Haimovich H, Braslavsky JH, 'Sufficient Conditions for Generic Feedback Stabilizability of Switching Systems via Lie-Algebraic Solvability', IEEE Transactions on Automatic Control, 58 814-820 (2013) [C1]
DOI10.1109/TAC.2012.2218151Author URL
CitationsScopus - 3Web of Science - 3
2012Perfumo CN, Kofman E, Braslavsky JH, Ward JK, 'Load management: Model-based control of aggregate power for populations of thermostatically controlled loads', Energy Conversion and Management, 55 36-48 (2012) [C1]
CitationsScopus - 48Web of Science - 39
2011Haimovich H, Braslavsky JH, Felicioni FE, 'Feedback Stabilization of Switching Discrete-Time Systems via Lie-Algebraic Techniques', IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 56 1129-1135 (2011) [C1]
DOI10.1109/TAC.2011.2106252Author URL
CitationsScopus - 8Web of Science - 5
2011Freudenberg JS, Middleton RH, Braslavsky JH, 'Minimum variance control over a Gaussian communication channel', IEEE Transactions on Automatic Control, 56 1751-1765 (2011) [C1]
DOI10.1109/TAC.2010.2097831
CitationsScopus - 15Web of Science - 12
Co-authorsRichard Middleton
2010Perfumo C, Ward JK, Braslavsky JH, 'Reducing energy use and operational cost of air conditioning systems with multi-objective evolutionary algorithms', 2010 IEEE World Congress on Computational Intelligence, WCCI 2010 - 2010 IEEE Congress on Evolutionary Computation, CEC 2010, (2010)

Air conditioning is responsible for around 60% of energy use in commercial buildings and is rapidly increasing in the residential sector. Although each system is individually small, the proliferation of air conditioning and the correlation of energy use with temperature is driving peak demand and the need for electricity distribution network upgrades. Energy retailers are now looking for ways to reduce this aggregate peak demand, leading to a tradeoff between peak demand, energy cost and the thermal comfort of building occupants. This paper presents a multi-objective evolutionary algorithm (MOEA) to quantify trade-offs amongst these three competing goals. We study a scenario with 8 air conditioners (ACs) and compare our findings against the case of having all ACs working independently, irrespective of global goals. The results show that, with statistically significant certainty, any run of the MOEA outperforms any scenario where the ACs function independently to keep a given level of comfort on a typical hot day. © 2010 IEEE.

DOI10.1109/CEC.2010.5586223
2010Middleton RH, Braslavsky JH, 'String instability in classes of linear time invariant formation control with limited communication range', IEEE Transactions on Automatic Control, 55 1519-1530 (2010) [C1]
DOI10.1109/TAC.2010.2042318
CitationsScopus - 54Web of Science - 43
Co-authorsRichard Middleton
2009Lau K, Braslavsky JH, Aguero JC, Goodwin GC, 'An errors-in-variables method for non-stationary data with application to mineral exploration', Automatica, 45 2971-2976 (2009) [C1]
DOI10.1016/j.automatica.2009.10.009
CitationsScopus - 3Web of Science - 1
Co-authorsJuan Aguero, Graham Goodwin
2009Middleton RH, Rojas AJ, Freudenberg JS, Braslavsky JH, 'Feedback stabilization over a first order moving average Gaussian noise channel', IEEE Transactions on Automatic Control, 54 163-167 (2009) [C1]
DOI10.1109/tac.2008.2007183
CitationsScopus - 20Web of Science - 12
Co-authorsRichard Middleton
2009Braslavsky JH, Middleton RH, Freudenberg JS, 'Authors' reply', IEEE Transactions on Automatic Control, 54 1427 (2009) [C3]
DOI10.1109/tac.2009.2020635
Co-authorsRichard Middleton
2008Rojas AJ, Braslavsky JH, Middleton RH, 'Channel signal-to-noise ratio constrained feedback control: performance and robustness', IET Control Theory and Applications, 2 595-605 (2008) [C1]
DOI10.1049/iet-cta:20070246
CitationsScopus - 20Web of Science - 12
Co-authorsRichard Middleton
2008Rojas AJ, Braslavsky JH, Middleton RH, 'Fundamental limitations in control over a communication channel', Automatica, 44 3147-3151 (2008) [C1]
DOI10.1016/j.automatica.2008.05.014
CitationsScopus - 42Web of Science - 26
Co-authorsRichard Middleton
2007Romero M, Braslavsky JH, Valla MI, 'Ripple reduction in direct torque and flux control of induction motors via sliding modes', Latin American Applied Research, 37 289-297 (2007) [C1]
CitationsScopus - 3Web of Science - 2
2007Braslavsky JH, Middleton RH, Freudenberg JS, 'Feedback stabilization over signal-to-noise ratio constrained channels', IEEE Transactions on Automatic Control, 52 1391-1403 (2007) [C1]
DOI10.1109/tac.2007.902739
CitationsScopus - 188Web of Science - 144
Co-authorsRichard Middleton
2005Braslavsky JH, Middleton RH, Freudenberg JS, 'Effects of time delay on feedback stabilisation over signal-to-noise ratio constrained channels', IFAC Proceedings Volumes (IFAC-PapersOnline), 16 219-224 (2005)

The expanding integration of control and communication networks in recent years has generated an increasing interest in control problems with feedback over a communication channel. Significant research activity has concentrated on stabilisation in face of channel effects such as quantisation and data-rate limits. in a recent paper, the authors have studied the problem of feedback stabilisation over a communication channel with a constraint on the admissible signal-to-noise ratio (SNR). It has been shown therein that for a delay-free, linear time-invariant feedback loop, a SNR constraint in the feedback channel imposes fundamental limitations in the ability to achieve closed-loop stability. The present paper extends these results by introducing a time-delay in the loop, and shows that the lowest SNR required for closed-loop stability increases by a factor that may grow exponentially with the time-delay and the unstable open loop poles of the system. This result contributes to the quantification of performance trade offs in integrated control and communication environments. Copyright © 2005 IFAC.

CitationsScopus - 5
Co-authorsRichard Middleton
2004Middleton R, Braslavsky JH, Freudenberg J, 'Stabilization of non-minimum phase plants over signal-to-noise ratio constrained channels', 2004 5th Asian Control Conference, 3 1914-1922 (2004)

We recently considered feedback stabilization over a Signal to Noise Ratio (SNR) constrained channel. The results were examined for the state feedback and minimum phase cases, with links to bit-rate limited control. In this paper, we extend this analysis to Non-Minimum Phase (NMP) plants, and show that for Linear Time Invariant (LTI) control, NMP zeros further constrain the ability to stabilize over an SNR limited channel. This differs from the situation of bit-rate limited stabilization where NMP zeros do not play a role. We show that by considering linear time varying feedback the effect of NMP zeros in SNR limited stabilization may be eliminated.

CitationsScopus - 1
Co-authorsRichard Middleton
2003Lau K, Middleton RH, Braslavsky JH, 'Undershoot and Settling Time Tradeoffs for Nonminimum Phase Systems', IEEE Transactions on Automatic Control, 48 1389-1393 (2003) [C1]
DOI10.1109/TAC.2003.815025
CitationsScopus - 25Web of Science - 15
Co-authorsRichard Middleton
2002Goodwin GC, Braslavsky JH, Seron MM, 'Non-stationary stochastic embedding for transfer function estimation', Automatica, 38 47-62 (2002) [C1]
CitationsScopus - 26Web of Science - 17
Co-authorsGraham Goodwin, Maria Seron
2000Arcak M, Seron M, Braslavsky J, Kokotovic P, 'Robustification of backstepping against input unmodeled dynamics', IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 45 1358-1363 (2000) [C1]
DOI10.1109/9.867048Author URL
CitationsWeb of Science - 9
Co-authorsMaria Seron
1999Braslavsky JH, Seron MM, Mayne DQ, Kokotovic PV, 'Limiting performance of optimal linear filters', AUTOMATICA, 35 189-199 (1999) [C1]
DOI10.1016/S0005-1098(98)00144-7Author URL
CitationsScopus - 33Web of Science - 30
Co-authorsMaria Seron
1999Seron MM, Braslavsky JH, Kokotovic PV, Mayne DQ, 'Feedback limitations in nonlinear systems: From bode integrals to cheap control', IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 44 829-833 (1999) [C1]
DOI10.1109/9.754828Author URL
CitationsScopus - 97Web of Science - 87
Co-authorsMaria Seron
1998Braslavsky JH, Middleton RH, Freudenberg JS, 'L2-Induced norms and frequency gains of sampled-data sensitivity operators', IEEE Transactions on Automatic Control, 43 252-258 (1998)

This paper develops exact, computable formulas for the frequency gain and L2-induced norm of the sensitivity operator in a sampled-data control system. With sampled data, we refer to a system that combines both continuous-time and discrete-time signals, which is studied in continuous time. The expressions are obtained using lifting techniques in the frequency domain and have application in performance and stability robustness analysis taking into account full intersample information.

DOI10.1109/9.661076
CitationsScopus - 14
Co-authorsRichard Middleton
1998Braslavsky JH, Middleton RH, Freudenberg JS, 'L2-Induced Norms and Frequency Gains of Sampled-Data Sensitivity Operators', IEEE Transactions on Automatic Control, 43 252-258 (1998) [C1]
CitationsWeb of Science - 11
Co-authorsRichard Middleton
1997Freudenberg JS, Middleton RH, Braslavsky JH, 'Robustness of zero shifting via generalized sampled-data hold functions', IEEE Transactions on Automatic Control, 42 1681-1692 (1997) [C1]
CitationsScopus - 19Web of Science - 17
Co-authorsRichard Middleton
1997Braslavsky JH, Meinsma G, Middleton RH, Freudenberg JS, 'On a key sampling formula relating the Laplace and Z transforms', Systems & Control Letters, 29 181-190 (1997) [C1]
CitationsScopus - 10Web of Science - 10
Co-authorsRichard Middleton
1996Braslavsky JH, Middleton RH, 'Global and semi-global stabilizability in certain cascade nonlinear systems', IEEE Transactions on Automatic Control, 41 876-881 (1996) [C1]
CitationsScopus - 14Web of Science - 15
Co-authorsRichard Middleton
1995BRASLAVSKY JH, MIDDLETON RH, FREUDENBERG JS, 'Sensitivity and robustness of sampled-data control systems: A frequency domain viewpoint.', PROCEEDINGS OF THE 1995 AMERICAN CONTROL CONFERENCE, VOLS 1-6, 1040-1044 (1995)
Author URL
CitationsScopus - 2Web of Science - 2
Co-authorsRichard Middleton
1995FREUDENBERG JS, MIDDLETON RH, BRASLAVSKY JH, 'INHERENT DESIGN LIMITATIONS FOR LINEAR SAMPLED-DATA FEEDBACK-SYSTEMS', INTERNATIONAL JOURNAL OF CONTROL, 61 1387-1421 (1995)
DOI10.1080/00207179508921961Author URL
CitationsWeb of Science - 34
Co-authorsRichard Middleton
1994BRASLAVSKY JH, MIDDLETON RH, 'GLOBAL AND SEMIGLOBAL STABILIZABILITY IN CERTAIN CASCADE NONLINEAR-SYSTEMS', PROCEEDINGS OF THE 1994 AMERICAN CONTROL CONFERENCE, VOLS 1-3, 1761-1765 (1994)
Author URL
CitationsScopus - 1Web of Science - 1
Co-authorsRichard Middleton
1994FREUDENBERG JS, MIDDLETON RH, BRASLAVSKY JH, 'INHERENT DESIGN LIMITATIONS FOR LINEAR SAMPLED-DATA FEEDBACK-SYSTEMS', PROCEEDINGS OF THE 1994 AMERICAN CONTROL CONFERENCE, VOLS 1-3, 3227-3231 (1994)
Author URL
CitationsScopus - 2Web of Science - 2
Co-authorsRichard Middleton
Show 28 more journal articles

Conference (49 outputs)

YearCitationAltmetricsLink
2014Heidari R, Seron MM, Braslavsky JH, Haimovich H, 'On Componentwise Ultimate Bound Minimisation for Switched Linear Systems Via Closed-Loop Lie-Algebraic Solvability', Proceedings of the 19th IFAC World Congress, 2014, Cape Town, South Africa (2014) [E1]
DOI10.3182/20140824-6-ZA-1003.02663
Co-authorsMaria Seron
2014Mahdavi N, Perfumo C, Braslavsky JH, 'Bayesian parameter estimation for direct load control of populations of air conditioners', IFAC Proceedings Volumes (IFAC-PapersOnline) (2014) [E1]

Recent approaches for direct load control (DLC) of populations of air conditioners (ACs) to provide demand-side services in the electricity grid rely on mathematical models of the aggregate demand dynamics of these populations. These models can be parametrised by the physical characteristics of the ACs in the population, for example their thermal power. The knowledge of how their physical parameters are distributed in the population of real devices is instrumental in the analysis and implementation of controllers based on such models. For large populations, it is typically assumed that these parameters are stochastically distributed according to some probability distribution, e.g., log-normal, which has been effective in simulations. However, the identification of such distribution for a specific population remains an open problem for real-world deployments of DLC. This paper formulates a Bayesian framework for the state and parameter estimation of a previously developed input/output model for the aggregate demand response of heterogeneous populations of ACs. This framework enables us to assign a prior distribution to the parameters of the model, which is then updated using measurements of power demand data for the population to reach a posterior distribution that is more informative about the true value of these parameters. The framework uses sequential Monte Carlo methods, which are well-suited to existing high-performance computer hardware, and aims to provide a way to fill a gap between simulation and real implementation by validating posterior parameter distributions using real measurements. Simulation results indicate that our approach can successfully capture the values defining the distributions of physical parameters in a population simulated by 10,000 ACs with a standard hybrid dynamic model for each device.

2014Mahdavi N, Perfumo C, Braslavsky JH, 'Towards load control of populations of air conditioners with guaranteed comfort margins', IFAC Proceedings Volumes (IFAC-PapersOnline) (2014) [E1]

The increasing penetration of renewable sources in electricity grids has motivated interest in controlling loads to compensate for variability of these generation sources. Air conditioners (ACs) are one type of loads that can be effectively controlled by broadcasting temperature setpoint offsets and using measurements of aggregate power demand for feedback, as shown in recent works. While such control approach can arbitrarily shape demand, it does so at the expense of end-use comfort, which may be a deterrent to participation in such programmes. This paper explores the use of an alternative to setpoint offsets to shape aggregate demand of ACs without violating end-use comfort levels. The proposed control consists in manipulating the width of the ACs' temperature regulation bands by raising the low temperature limit (or lowering the high temperature limit) to change aggregate demand while keeping AC temperatures within the specified ranges. We develop a deterministic mathematical model for the AC aggregate demand response to changes in the new proposed control input, and numerically validate it against a simulated population of ACs. The resulting model is amenable to systematic analysis and design for direct load control with guaranteed comfort margins. We illustrate this point by deriving a theoretical upper bound on the maximum energy that may be released from a given population of ACs controlled using the proposed control input.

2013Braslavsky JH, Perfumo C, Ward JK, 'Model-based feedback control of distributed air-conditioning loads for fast demand-side ancillary services', 2013 IEEE 52ND ANNUAL CONFERENCE ON DECISION AND CONTROL (CDC), Florence, ITALY (2013)
Author URL
2013Heidari R, Seron MM, Braslavsky JH, 'On Eigenvalue-Eigenvector Assignment for Componentwise Ultimate Bound Minimisation in MIMO LTI Discrete-Time Systems', 2013 3rd Australian Control Conference (AUCC), Perth, Australia (2013) [E1]
DOI10.1109/AUCC.2013.6697312Author URL
Co-authorsMaria Seron
2013Braslavsky JH, Perfumo C, Ward JK, 'Model-based feedback control of distributed air-conditioning loads for fast demand-side ancillary services', Proceedings of the IEEE Conference on Decision and Control, Florence, Italy (2013) [E1]
DOI10.1109/CDC.2013.6760881
CitationsScopus - 2
2013Stuedli S, Middleton RH, Braslavsky JH, 'A fixed-structure automaton for load management of electric vehicles', 2013 European Control Conference, ECC 2013, Zurich, Switzerland (2013) [E1]
CitationsScopus - 2
Co-authorsRichard Middleton
2013Heidari R, Seron MM, Braslavsky JH, Haimovich H, 'Eigenvalue assignment for componentwise ultimate bound minimisation in LTI discrete-time systems', 2013 European Control Conference, ECC 2013, Zurich, Switzerland (2013) [E1]
Co-authorsMaria Seron
2013Perfumo C, Braslavsky J, Ward JK, Kofman E, 'An analytical characterisation of cold-load pickup oscillations in thermostatically controlled loads', 2013 3RD AUSTRALIAN CONTROL CONFERENCE (AUCC), Perth, AUSTRALIA (2013)
Author URL
2013Perfumo C, Braslavsky J, Ward JK, 'A sensitivity analysis of the dynamics of a population of thermostatically-controlled loads', 2013 Australasian Universities Power Engineering Conference, AUPEC 2013 (2013)

Load control of populations of thermostatically-controlled loads (TCLs) is considered a promising approach to match generation and consumption in electricity grids from the demand side. However, when these loads become synchronised they present a decaying oscillatory aggregate demand, which results in undesired power peaks. In this paper we describe the nature of these oscillations and develop a list of factors that determine its shape. We perform a sensitivity analysis which allows us to identify important relations between the physical parameters of the TCLs and their aggregate dynamics. Beyond describing fundamental behaviour, these relations can help develop and validate analytical expressions that facilitate control design, enabling the use of TCLs for demand response. © 2013 Australasian Committee for Power Engineering (ACPE).

2011Perfumo CN, Kofman E, Braslavsky JH, Ward JK, 'Model-based control on populations of air conditioners: Shaping aggregated power for demand side management', Proceedings of the 2011 Australian Control Conference, AUCC 2011, Melbourne, Vic (2011) [E1]
CitationsScopus - 1
2010Perfumo CN, Ward JK, Braslavsky JH, 'Achieving a synergy by combining air conditioners and photovoltaic panels: An evolutionary-algorithm approach', 20th Australasian Universities Power Engineering Conference:, Christchurch, NZ (2010) [E1]
2010Haimovich H, Braslavsky JH, 'Feedback stabilisation of switched systems via iterative approximate eigenvector assignment', Proceedings of the 49th IEEE Conference on Decision and Control, Atlanta, GA (2010) [E1]
CitationsScopus - 8Web of Science - 3
2009Haimovich H, Braslavsky JH, Felicioni F, 'On feedback stabilisation of switched discrete-time systems via lie-algebraic techniques', Proceedings of the 48th IEEE Conference on Decision and Control, 2009 held jointly with the 2009 28th Chinese Control Conference, CDC/CCC 2009, Shanghai, China (2009) [E1]
DOI10.1109/cdc.2009.5399527
CitationsScopus - 6
2009Ugryumova D, Lau K, Braslavsky JH, Meinsma G, 'An application of system identification techniques to impedance estimation in magnetotelluric surveying', Proceedings of the 15th IFAC Symposium on System Identification, Saint-Malo, France (2009) [E1]
DOI10.3182/20090706-3-fr-2004.0268
2008Godoy BI, Braslavsky JH, Aguero JC, 'A simulation study on model predictive control and extremum seeking control for heap bioleaching processes', Proceedings of the 17th World Congress of the International Federation of Automatic Control, Seoul, Korea (2008) [E1]
DOI10.3182/20080706-5-kr-1001.2024
Co-authorsJuan Aguero
2008Lau K, Braslavsky JH, Aguero JC, Goodwin GC, 'Application of non-stationary EIV methods to transient electromagnetic mineral exploration', Proceedings of the 17th World Congress of the International Federation of Automatic Control, Seoul, Korea (2008) [E1]
DOI10.3182/20080706-5-kr-1001.1488
Co-authorsJuan Aguero, Graham Goodwin
2008Rojas AJ, Middleton RH, Freudenberg JS, Braslavsky JH, 'Input disturbance rejection in channel signal-to-noise ratio constrained feedback control', Proceedings of the American Control Conference 2008, Seattle, Washington (2008) [E1]
DOI10.1109/acc.2008.4586969
CitationsScopus - 7Web of Science - 2
Co-authorsRichard Middleton
2008Freudenberg JS, Middleton RH, Braslavsky JH, 'Minimum variance control over a Gaussian communication channel', Proceedings of the American Control Conference 2008, Seattle, Washington (2008) [E1]
DOI10.1109/acc.2008.4586888
CitationsScopus - 7Web of Science - 6
Co-authorsRichard Middleton
2007Godoy BI, Braslavsky JH, Mahata K, 'Low Complexity Modelling and Parameter Estimation in Copper Bioleaching Processes', Preprints of the 14th IFAC Symposium on System Identification, Newcastle, NSW, Australia (2007) [E1]
Co-authorsKaushik Mahata
2007Braslavsky JH, Rojas AJ, Middleton RH, 'Feedback control over signal to noise ratio constrained communication channels', CT07 Abstracts, San Francisco, CA (2007) [E3]
Co-authorsRichard Middleton
2007Rojas AJ, Braslavsky JH, Middleton RH, 'Output feedback sensitivity functions under signal to noise ratio constraint', Proceedings of the 2007 American Control Conference ACC '07, New York (2007) [E1]
DOI10.1109/acc.2007.4282601
CitationsScopus - 4
Co-authorsRichard Middleton
2007Rojas AJ, Braslavsky JH, Middleton RH, 'Output feedback sensitivity functions under signal to noise ratio constraint', 2007 AMERICAN CONTROL CONFERENCE, VOLS 1-13, New York, NY (2007)
Author URL
Co-authorsRichard Middleton
2007Freudenberg JS, Middleton RH, Braslavsky JH, 'Stabilization with disturbance attenuation over a Gaussian channel', PROCEEDINGS OF THE 46TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-14, New Orleans, LA (2007)
Author URL
Co-authorsRichard Middleton
2007Godoy BI, Braslavsky JH, Agueero JC, 'A model-based feedback control strategy for heap bioleaching processes', PROCEEDINGS OF THE 46TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-14, New Orleans, LA (2007)
Author URL
Co-authorsJuan Aguero
2007McVinish R, Braslavsky JH, Mengersen K, 'A Bayesian - Decision Theoretic Approach to Model Error Modeling', Preprints of the 14th IFAC Symposium on System Identification, Newcastle, Australia (2007) [E1]
2007Godoy BI, Braslavsky JH, Aguero JC, 'A model-based feedback control strategy for heap bioleaching processes', Proceedings of the 46th IEEE Conference on Decision and Control 2007, New Orleans (2007) [E1]
Co-authorsJuan Aguero
2007Lau K, Braslavsky JH, Goodwin GC, 'Errors-in-variables problems in transient electromagnetic mineral exploration', Proceedings of the 46th IEEE Conference on Decision and Control 2007, New Orleans (2007) [E1]
CitationsScopus - 1
Co-authorsGraham Goodwin
2007Freudenberg JS, Middleton RH, Braslavsky JH, 'Stabilization with disturbance attenuation over a Gaussian channel', Proceedings of the 46th IEEE Conference on Decision and Control, 2007, New Orleans (2007) [E1]
DOI10.1109/cdc.2007.4434535
CitationsScopus - 15
Co-authorsRichard Middleton
2006Braslavsky JH, Kofman E, Felicioni F, 'Effects of time quantization and noise in level crossing sampling stabilization', Proceedings of AADECA 2006, Buenos Aires, Argentina (2006) [E1]
2006Braslavsky JH, Middleton RH, Freudenberg JS, 'Effects of Time Delay on Feedback Stabilisation over Signal-To-Noise Ratio Constrained Channels', Proceedings of 16th IFAC World Congress, Prague, Czech Republic (2006) [E1]
Co-authorsRichard Middleton
2006Kofman E, Braslavsky JH, 'Level Crossing Sampling in Feedback Stabilization under Data-Rate Constraints', Proceedings of the 45th IEEE Conference on Decision and Control, San Diego, CA, USA (2006) [E1]
CitationsScopus - 56Web of Science - 37
2006Rojas AJ, Freudenberg JS, Braslavsky JH, Middleton RH, 'Optimal Signal to Noise Ratio in Feedback over Communicatiion Channels with Memory', Proceedings of the 45th IEEE Conference on Decision and Control, San Diego, CA, USA (2006) [E1]
CitationsScopus - 6Web of Science - 4
Co-authorsRichard Middleton
2006Rojas AJ, Braslavsky JH, Middleton RH, 'Output Feedback Stabilisation over Bandwidth Limited, Signal to Noise Ratio Constrained Communication Channels', Proceedings of the 2006 American Control Conference, Minneapolis, Minnesota, USA (2006) [E1]
CitationsScopus - 20Web of Science - 4
Co-authorsRichard Middleton
2005Freudenberg J, Braslavsky JH, Middleton RH, 'Control Over Signal-To-Noise Ratio Constrained Channels: Stabilization and Performance', Proceedings of 44th IEEE Conference on Decision and Control, Seville, Spain (2005) [E1]
CitationsScopus - 8Web of Science - 1
Co-authorsRichard Middleton
2005Rojas AJ, Braslavsky JH, Middleton RH, 'Control Over A Bandwidth Limited Signal to Noise Ratio Constrained Communication Channel', Proceedings of The 44th IEEE Conference on Decision and Control, Seville, Spain (2005) [E1]
DOI10.1109/CDC.2005.1582154
CitationsScopus - 13Web of Science - 5
Co-authorsRichard Middleton
2004Middleton RH, Braslavsky JH, Freudenberg J, 'Stabization of non-minimum phase plants over signal-to-noise ratio constrained channels', CD ROM, Melbourne (2004) [E1]
Co-authorsRichard Middleton
2004Braslavsky JH, Middleton RH, Freudenberg JS, 'Feedback stabilization over signal-to-noise ratio constrained channels', CD ROM, Boston (2004) [E1]
CitationsScopus - 34Web of Science - 17
Co-authorsRichard Middleton
2003Middleton RH, Lau K, Braslavsky JH, 'Conjectures and Counterexamples on Optimal L2 Disturbance Attenuation in Nonlinear Systems', Proceedings for the CDC 2003 (CD ROM), Maui, Hawaii, USA (2003) [E1]
CitationsScopus - 4
Co-authorsRichard Middleton
2002Middleton RH, Braslavsky JH, 'Towards quantitative time domain design tradeoffs in nonlinear control', PROCEEDINGS OF THE 2002 AMERICAN CONTROL CONFERENCE, VOLS 1-6, ANCHORAGE, AK (2002) [E1]
Author URL
Co-authorsRichard Middleton
2000Middleton RH, Braslavsky JH, 'On the relationship between logarithmic sensitivity integrals and limiting optimal control problems', CDC Downunder, Sydney, Australia (2000) [E1]
CitationsScopus - 11Web of Science - 7
Co-authorsRichard Middleton
1999Goodwin GC, Braslavsky JH, Seron MM, 'Non-Stationary Stochastic Embedding for Transfer Function Estimation', IFAC World Congress 1999, Beijing, P.R. China (1999) [E1]
Co-authorsGraham Goodwin
1999Braslavsky JH, Middleton RH, Freudenberg JS, 'Cheap Control Performance of a Class of Non-Right-Invertible Nonlinear Systems', Proceedings of the 38th Conference on Decision and Control, Phoenix, Arizona USA (1999) [E1]
CitationsScopus - 10Web of Science - 7
Co-authorsRichard Middleton
1999Braslavsky JH, Middleton RH, Freudenberg JS, 'Performance Limitations in a Class of Single-Input Two-Output Nonlinear Systems', Proceedings of the American Control Conference, San Diego, California, USA (1999) [E1]
CitationsScopus - 1
Co-authorsRichard Middleton
1998Braslavsky JH, Seron MM, Kokotovic PV, 'Near-optimal cheap control of nonlinear systems', NONLINEAR CONTROL SYSTEMS DESIGN 1998, VOLS 1& 2, ENSCHEDE, NETHERLANDS (1998)
Author URL
Co-authorsMaria Seron
1996Braslavsky JH, Seron MM, Goodwin GC, Grainger RW, 'Tradeoffs in multivariable filter design with applications to fault detection', PROCEEDINGS OF THE 35TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-4, KOBE, JAPAN (1996)
Author URL
Co-authorsMaria Seron, Graham Goodwin
1995Braslavsky J, Middleton R, Freudenberg J, 'Frequency response of generalized sampled-data hold functions', PROCEEDINGS OF THE 34TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-4, NEW ORLEANS, LA (1995)
Author URL
Co-authorsRichard Middleton
1994BRASLAVSKY JH, MIDDLETON RH, 'ON THE STABILISATION OF LINEAR UNSTABLE SYSTEMS WITH CONTROL CONSTRAINTS', AUTOMATIC CONTROL - WORLD CONGRESS 1993, VOL 2, SYDNEY, AUSTRALIA (1994)
Author URL
Co-authorsRichard Middleton
1994FREUDENBERG J, MIDDLETON R, BRASLAVSKY J, 'ROBUSTNESS OF ZERO-SHIFTING VIA GENERALIZED SAMPLED-DATA HOLD FUNCTIONS', PROCEEDINGS OF THE 33RD IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-4, LAKE BUENA VISTA, FL (1994)
Author URL
Show 46 more conferences

Report (1 outputs)

YearCitationAltmetricsLink
2009Braslavsky JH, Adams GJ, Seron MM, 'Potential Research Areas in Coordinated Voltage Regulation', Energy Australia, 7 (2009) [R1]
Co-authorsMaria Seron
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Grants and Funding

Summary

Number of grants15
Total funding$14,797,995

Click on a grant title below to expand the full details for that specific grant.


20141 grants / $350,900

Analysis and control of distributed energy resources in electrical grids$350,900

Funding body: CSIRO - Commonwealth Scientific and Industrial Research Organisation

Funding bodyCSIRO - Commonwealth Scientific and Industrial Research Organisation
Project TeamDoctor Maria Seron, Doctor Julio Braslavsky
SchemeNational Research Flagship Visiting Fellowships
RoleInvestigator
Funding Start2014
Funding Finish2014
GNoG1401392
Type Of FundingOther Public Sector - Commonwealth
Category2OPC
UONY

20133 grants / $123,682

Model-based estimation and control solutions to efficient network energy management$118,182

Funding body: CSIRO - Commonwealth Scientific and Industrial Research Organisation

Funding bodyCSIRO - Commonwealth Scientific and Industrial Research Organisation
Project TeamDoctor Maria Seron, Doctor Julio Braslavsky
SchemeNational Research Flagship Visiting Fellowships
RoleInvestigator
Funding Start2013
Funding Finish2013
GNoG1300783
Type Of FundingOther Public Sector - Commonwealth
Category2OPC
UONY

CSIRO Travel Alvarez$4,000

Funding body: CSIRO - Commonwealth Scientific and Industrial Research Organisation

Funding bodyCSIRO - Commonwealth Scientific and Industrial Research Organisation
Project TeamDoctor Maria Seron, Doctor Julio Braslavsky
SchemeCollaborative Relationship Agreement
RoleInvestigator
Funding Start2013
Funding Finish2013
GNoG1300377
Type Of FundingOther Public Sector - Commonwealth
Category2OPC
UONY

CSIRO Travel Osella$1,500

Funding body: CSIRO - Energy Technology

Funding bodyCSIRO - Energy Technology
Project TeamDoctor Maria Seron, Doctor Julio Braslavsky
SchemeResearch Grant
RoleInvestigator
Funding Start2013
Funding Finish2013
GNoG1201203
Type Of FundingOther Public Sector - Commonwealth
Category2OPC
UONY

20101 grants / $20,000

New methods in analysis and design of switched control systems$20,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Julio Braslavsky, Dr Hernan Haimovich
SchemeNear Miss Grant
RoleLead
Funding Start2010
Funding Finish2010
GNoG0900210
Type Of FundingInternal
CategoryINTE
UONY

20092 grants / $98,420

Multiobjective optimisation for building comfort and energy$78,420

Funding body: CSIRO - Energy Technology

Funding bodyCSIRO - Energy Technology
Project TeamDoctor Julio Braslavsky, Dr John Ward
SchemePostgraduate Research Scholarship
RoleLead
Funding Start2009
Funding Finish2009
GNoG0190217
Type Of FundingOther Public Sector - Commonwealth
Category2OPC
UONY

Fault Accommodation in Electricity Networks$20,000

Funding body: Ausgrid

Funding bodyAusgrid
Project TeamDoctor Julio Braslavsky, Doctor Gregory Adams, Doctor Maria Seron
SchemeSponsorship Agreement
RoleLead
Funding Start2009
Funding Finish2009
GNoG0900081
Type Of FundingOther Public Sector - State
Category2OPS
UONY

20085 grants / $6,985,561

Centre for Complex Dynamic Systems and Control$5,400,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamEmeritus Laureate Professor Graham Goodwin, Professor Minyue Fu, Professor Reza Moheimani, Doctor Julio Braslavsky, Doctor Gregory Adams, Associate Professor Jose De Dona, Doctor Maria Seron, Doctor James Welsh, Doctor 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
SchemeARC Centres of Excellence
RoleInvestigator
Funding Start2008
Funding Finish2008
GNoG0188623
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

CDSC Sub-Account: Industrial Control and Optimization$660,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamEmeritus Laureate Professor Graham Goodwin, Doctor Julio Braslavsky
SchemeARC Centres of Excellence
RoleInvestigator
Funding Start2008
Funding Finish2008
GNoGS090004
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

CDSC Sub-Account: BHP-Billiton (IMP) and (OBOG)$600,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamEmeritus Laureate Professor Graham Goodwin, Associate Professor Tristan Perez, Doctor Julio Braslavsky
SchemeARC Centre sub-control account
RoleInvestigator
Funding Start2008
Funding Finish2008
GNoG0190455
Type Of FundingInternal
CategoryINTE
UONY

Centre for Complex Dynamic Systems and Control$323,084

Funding body: NSW Department of State and Regional Development

Funding bodyNSW Department of State and Regional Development
Project TeamEmeritus Laureate Professor Graham Goodwin, Professor Minyue Fu, Professor Reza Moheimani, Doctor Julio Braslavsky, Doctor Gregory Adams, Associate Professor Jose De Dona, Doctor Maria Seron, Doctor James Welsh, Doctor 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
SchemeCentres of Excellence (Partner)
RoleInvestigator
Funding Start2008
Funding Finish2008
GNoG0189187
Type Of FundingOther Public Sector - State
Category2OPS
UONY

17th IFAC World Congress - Convention and Exhibition Centre, Seoul Korea, 6/7/2008 - 11/7/2008$2,477

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Julio Braslavsky
SchemeTravel Grant
RoleLead
Funding Start2008
Funding Finish2008
GNoG0188916
Type Of FundingInternal
CategoryINTE
UONY

20032 grants / $7,179,432

Centre for Complex Dynamic Systems and Control.$6,929,432

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamProfessor Rick Middleton, Emeritus Laureate Professor Graham Goodwin, Professor Minyue Fu, Conjoint Professor Kerrie Mengersen, Professor Iain Raeburn, Professor Reza Moheimani, Dr William Heath, Doctor Julio Braslavsky, Associate Professor Jose De Dona, Doctor Richard Gerlach, Doctor Maria Seron, Associate Professor Brailey Sims
SchemeARC Centres of Excellence
RoleInvestigator
Funding Start2003
Funding Finish2003
GNoG0182216
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

Optimisation-based operator guidance (OBOG)$250,000

Funding body: BHP Billiton Innovation Pty Ltd

Funding bodyBHP Billiton Innovation Pty Ltd
Project TeamProfessor Rick Middleton, Emeritus Laureate Professor Graham Goodwin, Doctor Julio Braslavsky
SchemeCentres of Excellence (Partner)
RoleInvestigator
Funding Start2003
Funding Finish2003
GNoG0185849
Type Of FundingContract - Aust Non Government
Category3AFC
UONY

20011 grants / $40,000

Performance Limitations and Design of Nonlinear Control Systems$40,000

Funding body: National Agency for the Promotion of Science and Technology

Funding bodyNational Agency for the Promotion of Science and Technology
Project Team
SchemeFONCYT Scientific and Technological Research Project Grant
RoleLead
Funding Start2001
Funding Finish2002
GNo
Type Of FundingInternational - Non Competitive
Category3IFB
UONY
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Research Supervision

Current Supervision

CommencedResearch Title / Program / Supervisor Type
2013Performance and Robustness in Switched Systems
Electrical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2012Distributed Load Management of Electric Vehicles and Refrigerators
Electrical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor

Past Supervision

YearResearch Title / Program / Supervisor Type
2013Dynamic Modelling and Control of Heterogeneous Populations of Thermostatically Controlled Loads
Computer Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2008Modelling and Feedback Control of Copper Heap Bioleaching Processes
Electrical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2007Feedback Control Over Signal to Noise Ratio Constrained Communication Channels
Electrical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2007Direct torque and flow control of an induction machine using sliding modes with ripple reduction techniques
Electrical Engineering, Unknown
Co-Supervisor
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Dr Julio Braslavsky

Position

Conjoint Senior Lecturer
CSIRO Energy
School of Elect Engineering and Computer Science
Faculty of Engineering and Built Environment

Focus area

Electrical and Computer Engineering

Contact Details

Emailjulio.braslavsky@newcastle.edu.au
Phone(02) 4960 6071
Fax(02) 4960 6021

Office

BuildingCSIRO Energy Centre
Location10 Murray Dwyer Circuit Mayfield West NSW 2304

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