Hong Kong Centre for Logistics Robotics
The Chinese University of Hong Kong
T Stone Robotics Institute
Department of Mechanical and Automation Engineering
Seminar series on Robotics and AI (Talk 10-11, August 2022)
Prof. Gary Feng (City University of Hong Kong)
Prof. Xingjian Jing (City University of Hong Kong)
Prof. Yunhui Liu (The Chinese University of Hong Kong
Date: 11Aug, 2022 (THU)
Time: 4:00-6:00pm (GMT+8, Hong Kong Time)
Onsite: Conference Room, the Hong Kong Centre for Logistics Robotics, 510-519, Building 17W, HKSTP
Online: Zoom Webinar (zoom ID will be provided after registration)
Talk 10 (4:00pm) : Adaptive Event-Triggered Control of Multi-Agent Systems
Prof. Gary FENG
City University of Hong Kong
In this talk event-triggered control will be first overviewed. The motivation and major event-triggering mechanisms will be discussed. The challenging issue on exclusion of Zeno behavior will be highlighted. Then the adaptive event-triggered control will be considered for heterogeneous multi-agent systems. A fully distributed adaptive even-triggered control scheme will be presented for output consensus of such multi-agent systems. It is shown that the output consensus problem can be solved by the proposed adaptive event-triggered control scheme if a necessary and sufficient condition is satisfied. The feasibility of the proposed control scheme is discussed by excluding Zeno behavior. A numerical example is given to illustrate the effectiveness of the proposed control scheme.
Gang Feng received the B.Eng and M.Eng. Degrees in Automatic Control from Nanjing Aeronautical Institute, China in 1982 and in 1984 respectively, and the Ph.D. degree in Electrical Engineering from the University of Melbourne, Australia in 1992.
Professor Feng was a Lecturer in Royal Melbourne Institute of Technology, 1991 and a Senior Lecturer/Lecturer, University of New South Wales, 1992-1999. He has been with City University of Hong Kong since 2000, where he is now a Chair Professor of Mechatronic Engineering. He has received ChangJiang Chair Professorship award conferred by Ministry of Education, Alexander von Humboldt fellowship, the IEEE Computational Intelligence Society Fuzzy Systems Pioneer Award, the IEEE Transactions on Fuzzy Systems Outstanding Paper Award, the outstanding research award and President award of CityU, and several best conference paper awards.He is listed as a SCI highly cited researcher by Clarivate Analytics, 2016-2021. He is an author of one research monograph entitled “Analysis and Synthesis of Fuzzy Control Systems: A Model Based Approach”, and over 360 SCI indexed papers including over 160 in IEEE Transactions. His research interests include intelligent systems and control, networked control systems, and multi-agent systems and control.
Professor Feng is a fellow of IEEE. He has been the Associate Editor of IEEE Trans. Automatic Control, IEEE Trans. on Fuzzy Systems, IEEE Trans. Systems, Man, & Cybernetics, Mechatronics, Journal of Systems Science and Complexity, and Journal of Control Theory and Applications. He is also on the advisory board of Unmanned Systems.
Talk 11(5:00pm) : The X-Structure/mechanism Approach to Beneficial Nonlinear Design in Engineering
Prof. Xingjian JING
City University of Hong Kong
Nonlinearity can take an important and critical role in engineering systems and thus cannot be simply ignored in structural design, dynamic response analysis, and parameter selection. A key issue is how to analyze and design potential nonlinearities introduced to or inherent in a system of under study. This is a must-do task in many practical applications involving vibration control, energy harvesting, sensor systems and robots etc. This paper presents an up-to-date review on a cutting-edge method for nonlinearity manipulation and employment developed in recent several years, named as the X-shaped structure or mechanism approach. The method is inspired from animal leg/limb skeletons and can provide passive low-cost high-efficiency adjustable and beneficial nonlinear stiffness (high static & ultra-low dynamic), nonlinear damping (dependent on resonant frequency and vibration excitation amplitude) and nonlinear inertia (low static & high dynamic) individually or simultaneously. The X-shaped structure or mechanism is a generic structure or mechanism representing a class of beneficial geometric nonlinearity with realizable and flexible linkage mechanism or structural design of different variants or forms (quadrilateral, diamond, polygon, K/Z/S/V-shape, or others) which all share similar geometric nonlinearity and thus similar nonlinear stiffness/damping properties, flexible in design and easy to implement. This paper systematically reviews the research background & motivation, essential bio-inspired ideas, advantages of this novel method, beneficial nonlinear properties in stiffness, damping and inertia, and potential applications, and ends with some remarks and conclusions.
Xingjian Jing (M’13, SM’17) received the B.S. degree from Zhejiang University, China, the M.S. degree and PhD degree in Robotics from Shenyang Institute of Automation, Chinese Academy of Sciences, respectively. He also achieved the PhD degree in nonlinear systems and signal processing from University of Sheffield, U.K., in 2008.
He is now a Professor with the Department of Mechanical Engineering, City University of Hong Kong. Before joining in CityU, he was a Research Fellow with the Institute of Sound and Vibration Research, University of Southampton, followed by assistant professor and associate professor with Hong Kong Polytechnic University. His current research interests include: Nonlinear dynamics, Vibration, Control and Robotics, with a series of 200+ publications of 8000+ citations and H-index 47 (in Google Scholar), and a number of patents filed in China and US.
Prof Jing is the recipient of a number of academic and professional awards including 2016 IEEE SMC Andrew P. Sage Best Transactions Paper Award, 2017 TechConnect World Innovation Award in US, 2017 EASD Senior Research Prize in Europe and 2017 the First Prize of HK Construction Industry Council Innovation Award, etc.
He currently serves Associate Editors of Mechanical Systems and Signal Processing, IEEE Transactions on Industrial Electronics, & IEEE Transactions on Systems, Man, Cybernetics -Systems, and served as Technical Editor of IEEE/ASME Trans. on Mechatronics during 2015-2020. He was the lead editor of a special issue on “Exploring nonlinear benefits in engineering” published in Mechanical Systems and Signal Processing 2018-2019 and is the lead editor of the other special issue on “Next-generation vibration control exploiting nonlinearities” published in MSSP 2021-2022.
All are Welcome!