报告题目：Improved Razumikhin and Krasovskii Approaches for Discrete-Time Time-Varying Time-Delay Systems
报告人：Zhou Bin, Ph.D., Professor, School of Astronautics, Harbin Institute of Technology
Abstract: This talk is concerned with stability of discrete-time time-varying time-delay systems. The existing Razumikhin and Krasovskii stability approaches for this class of systems are improved in the sense that the time-shifts of the Razumikhin functions and Krasovskii functionals are allowed to take both negative and positive values. Three kinds of stability concepts, say, uniform stability, uniformly asymptotic stability and uniformly exponential stability, are considered. The improvements of the Razumikhin and Krasovskii approaches are achieved by using the concept of uniformly asymptotically stable (UAS) function, the notion of overshoot associated with the UAS function and an improved comparison lemma. Both delay-dependent and delay-independent stability theorems are obtained for a class of discrete-time linear time-delay systems by using the improved Razumikhin and Krasovskii stability approaches. Numerical examples demonstrate the effectiveness of the proposed methods.
Resume: 周彬，哈尔滨工业大学航天学院教授、博导。分别于2004年、2005年和2010年获得哈工大控制科学与工程系学士、硕士和博士学位。主要研究方向为时滞系统理论、线性系统理论、非线性控制理论及其在航天上的应用。以第一作者/通讯作者在控制理论和工程领域的主流和权威杂志IEEE Trans. on Automatic Control、Automatica、SIAM Journal on Control and Optimization等上发表论文100余篇。目前担任《IET Control Theory & Applications》、《Asian Journal of Control》、《控制与决策》、《系统科学与数学》和IEEE CSS Conference Editorial Board等杂志和国际会议编委会编委。是中国自动化学会控制理论专业委员会委员，IFAC线性控制系统技术委员会委员，IFAC非线性控制系统技术委员会委员，美国《数学评论》评论员，美国IEEE协会高级会员。曾获2017年度霍英东青年教师奖（三等）、2015年度“国家自然科学奖二等奖”一项（排第四）、2012年度“全国百篇优秀博士学位论文奖”、2008年度“第五届中国青少年科技创新奖”和2011年度“教育部新世纪优秀人才支持计划”。曾获国家自然科学基金优秀青年基金和霍英东青年教师基金等项目的资助。
报告题目：Divided State Feedback Control of Stochastic Systems
报告人：Feiqi Deng, Ph.D., Professor, Control Theory and Control Engineering, South China University of Technology
Abstract: In this talk, the divided state feedback control of stochastic systems is introduced. Firstly, the concepts of state extraction matrix and divided state feedback control are proposed. Secondly, a fine stability criterion is established for stochastic systems with dominating linear parts. Thirdly, the divided state feedback control of the delayed stochastic systems is investigated, the divided state feedback control law is designed and the corresponding stability criterion for the closed-loop system is established. Finally, divided fault tolerant control is investigated by way facing the cases with partial state information lost or delivered too late caused by the processes for sampling and signal transmission via networks. Two examples at the end of the paper are given to illustrate the usage and efficiency of the method proposed in the paper and the advantage of the divided state feedback control.
Resume：Feiqi Deng was born in 1962. He received the Ph.D. degree in control theory and control engineering from South China University of Technology, Guangzhou, in June 1997. Since October 1999, he has been a professor with South China University of Technology and the director of the Systems Engineering Institute of the university. He is currently a member of Technical Committee on Control Theory (TCCT), Chinese Association of Automation, and now he is serving as the chairs of the IEEE CSS Guangzhou Chapter and IEEE SMC Guangzhou Chapter, a vice editor-in-chief of Journal of South China University of Technology, and a member of the editorial boards of the following journals: IEEE Access, Control Theory and Applications, All about Systems and Control, Journal of Systems Engineering and Electronics, and Journal of Systems Engineering, etc. His main research interests include stability, stabilization, and robust control theory of complex systems, including time-delay systems, nonlinear systems and stochastic systems. He has published over three hundreds of journal papers on IEEE Transactions on Automatic Control, Automatica, SIAM Journal of Control and Optimization, International Journal of Systems Science and Systems & Control Letters etc. E-mail: firstname.lastname@example.org.