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| Received:December 30, 2004Revised:May 23, 2005 |
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| H-infinity control for networked control systems (NCS) with time-varying delays |
| Hong ZHAO, Min WU, Guoping LIU, Jinhua SHE |
| (School of Information Science and Engineering,Central South Universi ty,Changsha Hunan 410083,China;Laboratory of Complex Systems and Intelligence Science,Chinese Academy of Scie nces,Beijing 100080,China;School of Electronics,University of Glamorgan,Pont) |
| Abstract: |
| This paper discusses H-infin it y state feedback control for a networked control system with time-varying delays.Based on the free-weighing matri x method,a delay-dependent stability criterion satisfying a prescribed H-infini ty norm bound is presented for an NCS with unknown,time-varying and bounded del ays.And then,the criterion is transformed into suffici ent conditions based on linear matrix inequalities f or H-infinity control.The conditions thus obtained a re also used to design an H-infinity state feed back controller.This design method is further extend ed to solve the design problem of robust H-infin ity state feedback control.A numerical example demo nstrates the validity of the method. |
| Key words: H-infinity control Networked cont rol system (NCS) Time-varying delay State feedback Linear matrix inequality (LMI) Robust control |
