报告题目：
Smooth Interpolation Constraints for Bumpless Transfer Design in Periodic Piecewise Linear Systems
报告专家：
James Lam教授
报告时间：
2023年2月23日15:00--17:00，星期四
报告地点：
上海大学宝山校区东区机自大楼604
个人简介：
Professor J. Lam received a BSc (1st Hons.) degree in Mechanical Engineering from the University of Manchester. He obtained the MPhil and PhD degrees from the University of Cambridge. He is a Croucher Scholar, Croucher Fellow, and Distinguished Visiting Fellow of the Royal Academy of Engineering, and Cheung Kong Chair Professor. Prior to joining the University of Hong Kong in 1993 where he is now Chair Professor of Control Engineering, he was a faculty member at the City University of Hong Kong and the University of Melbourne.
Professor Lam is a Chartered Mathematician (CMath), Chartered Scientist (CSci), Chartered Engineer (CEng), Fellow of Institute of Electrical and Electronic Engineers (FIEEE), Fellow of Institution of Engineering and Technology (FIET), Fellow of Institute of Mathematics and Its Applications (FIMA), Fellow of Institution of Mechanical Engineers (FIMechE), Fellow of Hong Kong Institution of Engineers (FHKIE), and Fellow of Asia-Pacific Artificial Intelligence Association (FAAIA).
He is Editor-in-Chief of IET Control Theory and Applications, Journal of The Franklin Institute, Proc. IMechE Part I: Journal of Systems and Control Engineering, and Franklin Open, Subject Editor of Journal of Sound and Vibration, Editor of Asian Journal of Control, Senior Editor of Cogent Engineering, Section Editor of IET Journal of Engineering, Consulting Editor of International Journal of Systems Science, Associate Editor of Automatica and Multidimensional Systems and Signal Processing.
His recent research interests include multi-agent systems, positive systems, Boolean networks, networked control systems, and vibration control. He is a Highly Cited Researcher.
报告摘要：
Periodic Piecewise Linear Systems (PPLSs) are periodic systems with a finite number of subsystems in one fundamental period, used to model practical cyclic applications with piecewise features. While analyses and control problems of PPLS have been extensively investigated in the context of switched systems, a potential drawback is the introduction of undesirable transient behaviours (bumpy phenomena) due to nonlinearities. This talk introduces a bumpless H_inf control strategy for a class of PPLS based on exponential stability and L_2-gain analyses, with a novel characterization of bumpless transfer among a variety of subsystem controllers satisfying interpolation constraints. Specifically, derivative constraints and matrix norm constraints of the controller signals are introduced as smoothness measures. The bumpless transfer problem is formulated as an optimization problem with matrix inequality and equality constraints, providing a straightforward and effective way for bumpless transfer design with more design freedom.
