סמינר מחלקת מערכות - Prof. Emilia Fridman- Using Delays for Control
(The talk will be given in English)
Speaker: Prof. Emilia Fridman
Department of EE-Systems, Tel Aviv University
011 hall, Electrical Engineering-Kitot Building
Monday, April 24th, 2023
15:00 - 16:00
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Using Delays for Control
Abstract
In this talk by ”using delays” I understand either Time-Delay Approachesto control problems (that originally may be free of delays) or intentional inserting delays to the feedback. I will start with an old Time-Delay approach- to sampled-data control. In application to network-based control with communication constraints, this is the only approach that allows treating transmission delays larger than the sampling intervals. I will continue with ”usingartificial delays” via simple Lyapunov functionals that lead to feasible LMIsfor small delays and to simple sampled-data implementation. Finally I willpresent a New Time-Delay approach - this time to Averaging. The existingresults on averaging (that have been developed for about 60 years startingfrom the works of Bogoliubov and Mitropolsky) are qualitative: the originalsystem is stable for small enough values of the parameter if the averagedsystem is stable. Our approach provides the first Quantitative bounds onthe small parameter making averaging-based control (including Vibrationaland Extremum Seeking Control) reliable.
Short Bio
Emilia Fridman received the M.Sc and Ph.D in mathematics in Russia. Since 1993 she has been at Tel Aviv University, where she is currently Professor in the Department of Electrical Engineering - Systems. She has held numerous visiting positions in Europe, China and Australia. Her research interests include time-delay systems, networked control systems, distributed parameter systems, robust control and extremum seeking. She has published more than 200 journal articles and 2 monographs. She serves/served as Associate Editor in Automatica, SIAM Journal on Control and Optimization and IMA Journal of Mathematical Control and Information. In 2014 she was Nominated as a Highly Cited Researcher by Thomson Reuters. She is IEEE Fellow and a member of IFAC (International Federation of Automatic Control) Council. In 2021 she was recipient of IFAC Delay Systems Life Time Achievement Award and of Kadar Award for outstanding research in Tel Aviv University.
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