文献类型：期刊文献

英文题名：Observer-based sliding mode control for nonlinear state-delayed systems

作者：Niu, Y.[1]; Lam, J.[2]; Wang, X.[1]; Ho, D.W.C.[3]

机构：[1]E China Univ Sci & Technol, Sch Informat Sci & Engn, Shanghai 200237, Peoples R China;[2]Univ Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China;[3]City Univ Hong Kong, Dept Math, Hong Kong, Hong Kong, Peoples R China

年份：2004

卷号：35

期号：2

起止页码：139

外文期刊名：INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE

收录：;EI(收录号：2004208159801);WOS:【SCI-EXPANDED(收录号:WOS:000220617200007)】；

语种：英文

外文关键词：Asymptotic stability - Closed loop control systems - Control equipment - Functions - Matrix algebra - Nonlinear control systems - Observability - State estimation - State space methods - Vectors

摘要：An observer-based sliding mode control problem is studied for state-delayed systems with unmeasurable states and nonlinear uncertainties. The main advantage of the proposed scheme is that it eliminates the need for state variables to be fully accessible for its control. This is possible through the use of a sliding mode controller, which performs its control by employing state estimates obtained from the sliding mode observer. By means of linear matrix inequalities, a sufficient condition is then given to ensure the asymptotic stability of the overall closed-loop state-delayed system composed of the observer dynamics and the estimation error dynamics. Furthermore, it is shown that the proposed control scheme ensures the reachability of the sliding surfaces in both the state estimate space and the estimation error space.