Decentralized Control of Large-Scale Systems

1. Front Matter

   Pages i-xv

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2. Centralized Control Systems

   • Edward J. Davison, Amir G. Aghdam, Daniel E. Miller

   Pages 1-21

3. Decentralized Control Systems

   • Edward J. Davison, Amir G. Aghdam, Daniel E. Miller

   Pages 23-45

4. Robust Servomechanism Problem

   • Edward J. Davison, Amir G. Aghdam, Daniel E. Miller

   Pages 47-55

5. On Tuning Regulators

   • Edward J. Davison, Amir G. Aghdam, Daniel E. Miller

   Pages 57-83

6. Stability of Decentralized Systems Using Non-LTI Controllers

   • Edward J. Davison, Amir G. Aghdam, Daniel E. Miller

   Pages 85-123

7. Optimal Decentralized Control

   • Edward J. Davison, Amir G. Aghdam, Daniel E. Miller

   Pages 125-134

8. Optimal Performance in the Decentralized Setting

   • Edward J. Davison, Amir G. Aghdam, Daniel E. Miller

   Pages 135-163

9. Back Matter

   Pages 165-166

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A large-scale system is composed of several interconnected subsystems. For such a system it is often desired to have some form of decentralization in the control structure, since it is typically not realistic to assume that all output measurements can be transmitted to every local control station. Problems of this kind can appear in electric power systems, communication networks, large space structures, robotic systems, economic systems, and traffic networks, to name only a few. Typical large-scale control systems have several local control stations which observe only local outputs and control only local inputs. All controllers are involved, however, in the control operation of the overall system. The focus of this book is on the efficient control of interconnected systems, and it presents systems analysis and controller synthesis techniques using a variety of methods. A systematic study of multi-input, multi-output systems is carried out and illustrative examples are given to clarify the ideas.

• communication networks
• control structure
• decentralized control
• electric power systems
• interconnected subsystems
• large-scale system
• local control stations
• local inputs
• local outputs
• output measurements
• robotic systems

“The edition of the monograph should serve as an outstanding updated and extended reference book for control engineers, computer engineers, practitioners, graduate students, and applied mathematicians interested in this still rapidly developing area.” (Lubomír Bakule, zbMATH 1448.93001, 2020)

• The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, The University of Toronto, Toronto, Canada

  Edward J. Davison

• Department of Electrical and Computer Engineering, Concordia University, Montreal, Canada

  Amir G. Aghdam

• Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Canada

  Daniel E. Miller

EDWARD J. DAVISON completed his A.R.C.T. degree in piano at the Royal Conservatory of Music in 1958, and his B.A.Sc. degree in Engineering Physics and M.A degree in Mathematics from the University of Toronto in 1960, 1961 respectively. He then received his Ph.D. degree and the Sc.D. degree from Cambridge University in 1964 and 1977 respectively. He is at present University Professor Emeritus of Electrical and Computer Engineering at the University of Toronto.Dr. Davison has received several awards including the National Research Council of Canada's E.W.R. Steacie Memorial Fellowship 1974-77, the Canada Council Killam Research Fellowship 1979-80, 1981-83, the Athlone Fellowship in 1961-63 (Cambridge University), two IEEE Transactions on Automatic Control Outstanding Paper Awards, and a Current Contents Classic Paper Citation. He was elected a Member of the Academy of Nonlinear Sciences (ANS), Moscow, Russia in 1998, a Fellow of the Institute of Electrical and ElectronicEngineers in 1977, a Fellow of the Royal Society of Canada in 1977, an Honorary Professor of Beijing Institute of Aeronautics and Astronautics in 1986, and has been a designated Consulting Engineer of the Province of Ontario since 1979. He received the IEEE Centennial Medal in 1984,was elected a Distinguished Member of the IEEE Control Systems Society in 1984 and was awarded the International Federation of Automatic Control (IFAC) Outstanding Member Service Award in 1996. He was President of the consulting company Electrical Engineering Consociates Ltd (Toronto) from 1997 to 1999, and has served on numerous positions in the IEEE Control Systems Society, including President in 1983 and Consulting Editor of the IEEE Trans. on Automatic Control in 1985. He was elected to the Council of the Academy of Sciences, Royal Society of Canada, in 1999, and in 2003 he was elected a Life Fellow member of IEEE.He was Chairman of the International Federation of Automatic Control (IFAC) Theory Committee in 1988-1990, Vice-Chairman of the IFAC Technical Board in 1990-1993, a member of the IFAC Council in 1991-1996, and a member of the IFAC Policy committee in 1996-99. He has been a member of the IFAC Administrative and Finance Commitee from 1999 to 2005. He has served on numerous Editorial Boards of various journals. In 1993, he was awarded the triennial Quazza Medal from the International Federation of Automatic Control, and in December 1997 he was awarded the IEEE Control System's Hendrik W. Bode Lecture Prize. He was elected to the rank of University Professor of the University of Toronto in Jan 2001, and in May 2003 he was awarded the Killam Prize in Engineering from the Canada Council. In Oct 2003 he was inducted into the University of Toronto Engineering Alumni Hall of Distinction. He was elected a Fellow of the Canadian Academy of Engineering in June 2005, and in July 2005, he was elected a Fellow of the International Federation of Automatic Control. In 2010 he was awarded the 2010 Canada Outstanding Engineer Award given by the Institute of Electrical and Electronic Engineers (IEEE) Canada, and was elected a Foreign Member of the National Academy of Engineering (NAE), USA. Dr. Davison is a Designated Consulting Engineer of the Province of Ontario, and in this capacity he has been actively involved in transfer of knowledge from academia to the industrial sector through a variety of projects.



Amir G. Aghdam received his PhD in electrical and computer engineering from the University of Toronto in 2000. He is currently a Professor in the Department of Electrical and Computer Engineering at Concordia University and has served as an Associate Dean of The School of Graduate Studies (Student Affairs and Postdoctoral Studies) from 2016-2019. He is a member of Professional Engineers Ontario and a senior member of the IEEE. Dr. Aghdam is currently the Chair of the Conference Editorial Board of IEEE Control Systems Society, and has served as a Co-Editor-in-Chief of the IEEE Systems Journal and an Associate Editor of several journals including the IEEE Transactions on Control Systems Technology, European Journal of Control, IET Control Theory & Applications and IEEE Access. He has been a member of the Technical Program Committee of a number of conferences including IEEE Conference on Systems, Man and Cybernetics, IEEE Conference on Decision and Control, and IEEE Multiconference on Systems and Control. He was a member of the Review Committee for the Italian Research and University Evaluation Agency (ANVUR) for 2012-2013, and a member of Natural Sciences and Engineering Research Council of Canada (NSERC) ECE Evaluation Group for 2014-2016. He is a recipient of the 2009 IEEE MGA Achievement Award and 2011 IEEE Canada J. J. Archambault Eastern Canada Merit Award. Dr. Aghdam was the 2014–2015 President of IEEE Canada and Director (Region 7), IEEE Inc., and was also a member of IEEE Awards Board for this period. He is currently a member of IEEE Medal of Honor Committee. Dr. Aghdam was a Visiting Scholar at Harvard University in fall 2015. Dr. Aghdam has published more than 200 papers in refereed journals and conferences. His research interests include multi-agent networks, distributed control systems, sensor networks, optimization and sampled-data systems.Daniel E. Miller received the B.Sc. degree in Electrical Engineering from the University of New Brunswick in 1984, and the M.A.Sc. and Ph.D. degrees in Electrical Engineering from the University of Toronto in 1986 and 1990, respectively. During 1990 to 1991 he held postdoctoral positions at Cambridge University, U.K., the University of Groningen, The Netherlands, and the Massachusetts Institute of Technology. Since 1991 he has been a faculty member in the Department of Electrical and Computer Engineering, University of Waterloo. He has held visiting positions at the University of Alberta and the Universityof Newcastle, Australia, and has been an Associate Editor of the IEEE Transactions on Automatic Control. His research interests include decentralized control,adaptive control, sampled-data control, systems with delays, and performance limitations.

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