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Received:March 23, 2007Revised:October 14, 2008 |
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Robust stability analysis of networked control systems |
Jinfeng GAO , Hongye SU , Jian CHU |
(Institute of Automation, Zhejiang Sci-Tech University, Hangzhou Zhejiang 310018, China; Institute of Advanced Process Control, Zhejiang University, Hangzhou Zhejiang 310027, China) |
Abstract: |
This paper is concerned with the problem of robust stability analysis for networked control systems (NCSs). A new NCS model is proposed under consideration of both the network-induced delay and parameter uncertainties. The parameter uncertainties appearing in NCSs are norm-bounded, and possibly time-varying. The conventional method and the descriptor system method are used to obtain maximum allowable delay bound (MADB) guaranteeing robust stability and stability of the NCSs, respectively, where the stability criteria are formulated in terms of linear matrix inequalities (LMIs). And the MADB can be derived by solving the feasibility problem of the corresponding LMI. Some numerical examples are provided to illustrate the effectiveness of the proposed method. |
Key words: Robust control Time-delay system Networked control systems (NCSs) Linear matrix inequality (LMI) |