# Professor Valeri Ougrinovski

Professor
School of Engineering and Information Technology

LOCATION

Building 17 Room 218
School of Engineering and Information Technology, The University of New South Wales Canberra, PO Box 7916, Canberra BC ACT 2610, AUSTRALIA

• PUBLICATIONS

Research Profile

The main topic of Prof. Ougrinovski's research has been the mathematical control systems theory. Control Theory is a branch of Applied Mathematics concerned with mathematical foundations that underpin methodologies for the analysis and design of engineering control systems. Within that broad area, the main direction of Prof. Ougrinovski's  work has been concerned with mathematical tools for analysis and synthesis of control systems tolerant to modelling errors and disturbances, called robust control systems.  Robustness is a fundamental property of engineering systems that reflects their ability to maintain adequate performance in the face of imprecise a priori knowledge of system characteristics.

The early work of Prof. Ougrinovski was concerned with extending the mainstream H-infinity control design methodology into the realm of control systems subject to noises. The stochastic version of H-infinity control theory developed by Prof. Ougrinovski has allowed this milestone control design methodology to be applied to systems operating under the influence of randomly varying noise. It showed that a non-conservative and tractable analysis is possible in some cases where the conventional main instruments of robust control analysis are not readily applicable.

In the late 1990s - early 2000s, Prof. Ougrinovski and his colleagues including Prof I.R. Petersen and Prof M.R. James from the Australian National University developed the Minimax Linear-Quadratic-Gaussian (Minimax LQG) control design methodology. This methodology provided an important bridge between the modern methodology of robust control design via H-infinity methods, on one hand, and the classical method of optimal LQG control design, on the other hand. It allowed controllers with guaranteed and robust performance to be designed for control systems, where only partial information on the system is available for measurement. Since then, Prof Ougrinovski has successfully developed this methodology into a comprehensive theory which covers robustness issues arising in a large number of modern control systems design problems. These problems include synthesis of robust decentralized controllers, robustness of controllers for systems subject to random parameter changes, design of filters and observers for systems subject to model uncertainty, hidden Markov models estimation.

In the last several years, Prof Ougrinovski's work has focused on the development of the theory of distributed control and estimation of large-scale complex systems. His work aims to tackle challenging problems arising from system heterogeneity and information constraints. It is concerned with developing a systematic theory of distributed robust estimation targeting systems and processes in large networks of sensing nodes. This theory covers issues of synthesis of reliably performing networks in situations where the cooperation and communication between constituent elements of the network is critical for the network to function properly. His latest research aims to address new problems of control system security and resilience against strategic threats arising in the emerging theory of cyber-physical control systems.

Professor Ougrinovski serves, or has served, as an Associate Editor for leading journals in the discipline of systems and control: Automatica, SIAM Journal on Control and Optimization, IEEE Control Systems Letters (L-CSS), IET Control Theory and Applications. He is a member of IEEE Control Systems Society Editorial Board and has been actively involved in the conference organisation including the most prestigious conferences. He has served on program committees of several international conferences including the Joint IEEE Conference on Decision and Control - European Control Conference, Seville, 2005, IEEE Multi-Conference on Systems and Control, Sydney, 2015, and the series of Australian Control Conferences held annually (2011-2015). In 2014, he served as the Program Chair for the 2014 Australian Control Conference held in Canberra in November 2014. Also, he was a member of Organising Committees for the international IEEE 2016 Conference ”Norbert Wiener in the 21st Century”, Melbourne 2016, and 56th IEEE Conference on Decision and Control (Melbourne, 2017), and is currently member of Organising Committees for the 59th IEEE Conference on Decision and Control to be held in Korea in December 2020.

## Books

Ouyang H; Petersen I; Ugrinovskii V, 2014, H-infinity Methods for Control and State Estimation of Nonlinear Systems, LAP Lambert Academic Publishing, https://www.lap-publishing.com/catalog/details/store/gb/book/978-3-659-51214-8/h%E2%88%9E-methods-for-control-and-state-estimation-of-nonlinear-systems?search=9783659512148

Petersen IR; Ugrinovskii V; Savkin AV, 2000, Robust control design using H-infinity methods, Original, Springer-Verlag London Limited 2000, UK

## Book Chapters

Ugrinovskii V, 2018, 'Cooperative resilient estimation of uncertain systems subjected to a biasing interference', in Basar T (ed.), , Birkhauser, pp. 93 - 120, http://dx.doi.org/10.1007/978-3-030-04630-9_2

Xiong J; Ugrinovskii VA; Petersen IR, 2010, 'Decentralized output feedback guaranteed cost control of uncertain markovian jump large-scale systems: Local mode dependent control approach', in Efficient modeling and control of large-scale systems, pp. 167 - 196, http://dx.doi.org/10.1007/978-1-4419-5757-3_7

## Journal articles

Ugrinovskii V, 2019, 'Distributed H∞ Estimation Resilient to Biasing Attacks', IEEE Transactions on Control of Network Systems, http://dx.doi.org/10.1109/TCNS.2019.2924192

Deghat M; Ugrinovskii V; Shames I; Langbort C, 2019, 'Detection and mitigation of biasing attacks on distributed estimation networks', AUTOMATICA, vol. 99, pp. 369 - 381, http://dx.doi.org/10.1016/j.automatica.2018.10.052

Wu J; Ugrinovskii V; Allgower F, 2018, 'Cooperative Estimation and Robust Synchronization of Heterogeneous Multi-Agent Systems With Coupled Measurements', IEEE Transactions on Control of Network Systems, vol. 5, pp. 1597 - 1607, http://dx.doi.org/10.1109/TCNS.2017.2736960

Nguyen T; Miao Z; Pan Y; Amini N; Ugrinovskii V; James MR, 2017, 'Pole placement approach to coherent passive reservoir engineering for storing quantum information', Control Theory and Technology, vol. 15, pp. 193 - 205, http://dx.doi.org/10.1007/s11768-017-7020-2

Ugrinovskii V; Langbort C, 2017, 'Controller–jammer game models of Denial of Service in control systems operating over packet-dropping links', Automatica, vol. 84, pp. 128 - 141, http://dx.doi.org/10.1016/j.automatica.2017.07.009

Xue S; Nguyen T; James MR; Shabani A; Ugrinovskii V; Petersen IR, 2017, 'Modelling and Filtering for Non-Markovian Quantum Systems', ArXiv, https://arxiv.org/pdf/1704.00986.pdf

Hush MR; Bentley CDB; Ahlefeldt RL; James MR; Sellars MJ; Ugrinovskii V, 2016, 'Quantum state transfer through time reversal of an optical channel', Physical Review A, vol. 94, http://dx.doi.org/10.1103/PhysRevA.94.062302

Espinosa LAD; Miao Z; Petersen IR; Ugrinovskii V; James MR, 2016, 'Physical realizability and preservation of commutation and anticommutation relations for n-level quantum systems', SIAM Journal on Control and Optimization, vol. 54, pp. 632 - 661, http://dx.doi.org/10.1137/130931606

Cheng Y; Ugrinovskii V, 2016, 'Gain-scheduled leader-follower tracking control for interconnected parameter varying systems', International Journal of Robust and Nonlinear Control, vol. 26, pp. 461 - 488, http://dx.doi.org/10.1002/rnc.3320

Cheng Y; Ugrinovskii V, 2016, 'Event-triggered leader-following tracking control for multivariable multi-agent systems', Automatica, vol. 70, pp. 204 - 210, http://dx.doi.org/10.1016/j.automatica.2016.04.003

Pan Y; Ugrinovskii V; James MR, 2015, 'Ground-state Stabilization of Open Quantum Systems by Dissipation', Automatica, vol. 65, pp. 147 - 159, http://dx.doi.org/10.1016/j.automatica.2015.11.041

Pan Y; Miao Z; Amini NH; Ugrinovskii V; James MR, 2015, 'Interpolation Approach to Hamiltonian-varying Quantum Systems and the Adiabatic Theorem', EPJ Quantum Technology, vol. 2, http://dx.doi.org/10.1140/epjqt/s40507-015-0037-x

Cheng Y; Ugrinovskii V, 2015, 'Leader-follower tracking control with guaranteed consensus performance for interconnected systems with linear dynamic uncertain coupling', International Journal of Control, vol. 88, pp. 1663 - 1677, http://dx.doi.org/10.1080/00207179.2015.1013059

Cheng Y; Ugrinovskii V, 2015, 'Gain-scheduled leader-follower tracking control for interconnected parameter varying systems', International Journal of Robust and Nonlinear Control, http://dx.doi.org/10.1002/rnc.3320

Pan Y; Amini H; Miao Z; Gough J; Ugrinovskii V; James MR, 2014, 'Heisenberg picture approach to the stability of quantum Markov systems', Journal of Mathematical Physics, vol. 55, http://dx.doi.org/10.1063/1.4884300

Ugrinovskii V, 2014, 'Gain-scheduled synchronization of parameter varying systems via relative $H_\infty$ consensus with application to synchronization of uncertain bilinear systems', Automatica, vol. 50, pp. 2880 - 2887, http://dx.doi.org/10.1016/j.automatica.2014.10.003

Ugrinovskii V; Fridman E, 2014, 'A Round-Robin Type Protocol for Distributed Estimation with $H_\infty$ Consensus', Systems and Control Letters, vol. 69, pp. 103 - 110, http://dx.doi.org/10.1016/j.sysconle.2014.05.001

Ugrinovskii V, 2013, 'Conditions for Detectability in Distributed Consensus-Based Observer Networks', IEEE TRANSACTIONS ON AUTOMATIC CONTROL, vol. 58, pp. 2659 - 2664, http://dx.doi.org/10.1109/TAC.2013.2256675

Ugrinovskii V, 2013, 'Distributed robust estimation over randomly switching networks using H ‡ consensus', Automatica, vol. 49, pp. 160 - 168, http://dx.doi.org/10.1016/j.automatica.2012.09.010

Tanaka T; Langbort C; Ugrinovskii V, 2013, 'DC-Dominant property of cone-preserving transfer functions', Systems and Control Letters, vol. 62, pp. 699 - 707, http://dx.doi.org/10.1016/j.sysconle.2013.05.004

Ugrinovskii V, 2013, 'Conditions for detectability in distributed consensus-based observer networks', IEEE Transactions on Automatic Control, vol. 58, pp. 2659 - 2664, http://dx.doi.org/10.1109/TAC.2013.2256675

Xu D; Ugrinovskii V, 2013, 'Decentralized measurement feedback stabilization of large-scale systems via control vector Lyapunov functions', Systems and Control Letters, vol. 62, pp. 1187 - 1195, http://dx.doi.org/10.1016/j.sysconle.2013.09.013

Ma S; Xiong J; Ugrinovskii VA; Petersen IR, 2013, 'Robust decentralized stabilization of Markovian jump large-scale systems: A neighboring mode dependent control approach', Automatica, vol. 49, pp. 3105 - 3111, http://dx.doi.org/10.1016/j.automatica.2013.07.019

Petersen IR; Ugrinovskii V; James MR, 2012, 'Robust stability of uncertain linear quantum systems', Philosophical Transactions of the Royal Society of London Series A: Mathematical Physical and Engineering Sciences, vol. 370, pp. 5354 - 5363, http://dx.doi.org/10.1098/rsta.2011.0527

Ouyang H; Petersen IR; Ugrinovskii V, 2012, 'Lagrange stabilization of pendulum-like systems: A pseudo H infinity control approach', IEEE Transactions on Automatic Control, vol. 57, pp. 649 - 662, http://dx.doi.org/10.1109/TAC.2012.2185882

Petersen IR; Ugrinovskii V, 2012, 'Stability analysis and state feedback stabilization of pendulum-like systems with multiple nonlinearities', Automatica, vol. 48, pp. 2235 - 2243, http://dx.doi.org/10.1016/j.automatica.2012.06.022

Ugrinovskii V, 2011, 'Distributed robust filtering with H‡ consensus of estimates', Automatica, vol. 47, pp. 1 - 13, http://dx.doi.org/10.1016/j.automatica.2010.10.002

Langbort C; Ugrinovskii V, 2011, 'Diagonal Stability of Stochastic Systems subject to Nonlinear Disturbances and Diagonal H2 Norms', Automatica, vol. 47, pp. 1427 - 1434, http://dx.doi.org/10.1016/j.automatica.2011.02.019

Ugrinovskii V; Langbort C, 2011, 'Distributed H infinity consensus-based estimation of uncertain systems via dissipativity theory', IET Control Theory and Applications, vol. 5, pp. 1458 - 1469, http://dx.doi.org/10.1049/iet-cta.2010.0490

Hossain MJ; Pota HR; Ugrinovskii V; Ramos R, 2010, 'Simultaneous STATCOM and Pitch Angle Control for Improved LVRT Capability of Fixed-Speed Wind Turbines', IEEE Transactions on Sustainable Energy, vol. 1, pp. 142 - 151, http://dx.doi.org/10.1109/TSTE.2010.2054118

Hossain MJ; Pota HR; Ugrinovskii V; Ramos R, 2010, 'Voltage mode stabilisation in power systems with dynamic loads', International Journal of Electrical Power and Energy Systems, vol. 32, pp. 911 - 920, http://dx.doi.org/10.1016/j.ijepes.2010.06.001

Ugrinovskii V; Petersen IR, 2009, 'Guaranteed cost LQG control for uncertain systems with a normalized coprime factor uncertainty structure', Systems and Control Letters, vol. 58, pp. 724 - 735, http://dx.doi.org/10.1016/j.sysconle.2009.08.001

Ugrinovskii V, 2009, 'Risk-sensitivity conditions for stochastic uncertain model validation', Automatica, vol. 45, pp. 2651 - 2658, http://dx.doi.org/10.1016/j.automatica.2009.07.019

Xiong J; Ugrinovskii V; Petersen IR, 2009, 'Local Mode Dependent Decentralized Stabilization of Uncertain Markovian Jump Large-Scale Systems', IEEE Transactions on Automatic Control, vol. 54, pp. 2632 - 2637, http://dx.doi.org/10.1109/TAC.2009.2031565

Yoon M; Ougrinovski V, 2008, 'Robust Tracking Problem for Continuous Time Stochastic Uncertain Systems', Asian Journal of Control, vol. 10, pp. 351 - 360, http://dx.doi.org/10.1002/asjc.28

Xie L; Ugrinovskii V; Petersen IR, 2008, 'Finite horizon robust state estimation for uncertain finite-alphabet hidden Markov models with conditional relative entropy constraints', SIAM Journal on Control and Optimization, vol. 47, pp. 476 - 508, http://dx.doi.org/10.1137/040611379

Ford JJ; Ugrinovskii V, 2008, 'Robust Control of Nonlinear Jump Parameter Systems governed by Uncertain Chains', IEEE Transactions on Automatic Control, vol. 53, pp. 1520 - 1525

Yoon M; Ugrinovskii V; Pszczel M, 2007, 'Gain-Scheduling of Minimax Optimal State-Feedback Controllers for Uncertain LPV Systems', IEEE Transactions on Automatic Control, vol. 52, pp. 311 - 317, http://dx.doi.org/10.1109/TAC.2006.887904

Li L; Ugrinovskii V; Orsi R, 2007, 'Decentralized robust control of uncertain Markov jump parameter systems via output feedback', Automatica, vol. 43, pp. 1932 - 1944, http://dx.doi.org/10.1016/j.automatica.2007.03.016

Li L; Ugrinovskii V, 2007, 'On Necessary and Sufficient Conditions for H¿¿ Output Feedback Control of Markov Jump Linear Systems', IEEE Transactions on Automatic Control, vol. 52, pp. 1287 - 1292, http://dx.doi.org/10.1109/TAC.2007.900832

Pota HR; Athanasius X; Li L; Ugrinovskii V, 2007, 'Robust Decentralized Control of Power Systems with OLTCs Using Markov Jump Parameter Theory', The Journal of CPRI, vol. 3, pp. 202 - 224

Xie L; Ugrinovskii V; Petersen IR, 2007, 'A posteriori probability distances between finite-alphabet hidden Markov models', IEEE Transactions on Information Theory, vol. 53, pp. 783 - 793, http://dx.doi.org/10.1109/TIT.2006.887076

Ugrinovskii VA; Petersen IR, 2006, 'Robust ISI equalization for uncertain channels via minimax optimal filtering', International Journal of Adaptive Control and Signal Processing, vol. 20, pp. 99 - 122, http://dx.doi.org/10.1002/acs.887

Ougrinovski V; Pakshin PV, 2006, 'Stochastic Problems of Absolute Stability', Automation and Remote Control, vol. 67, pp. 1811 - 1846, http://dx.doi.org/10.1134/S0005117906110051

Ougrinovski V, 2005, 'Randomized algorithms for robust stability and guaranteed cost control of stochastic jump parameter systems with uncertain switching policies', Journal of Optimization Theory and Applications, vol. 124, pp. 227 - 245, http://dx.doi.org/10.1007/s10957-004-6474-9

Ougrinovski V, 2005, 'Robust controlability of linear stochastic uncertain systems', Automatica, vol. 41, pp. 807 - 813, http://dx.doi.org/10.1016/j.automatica.2004.10.016

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