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		Wen'an ZHANG,Li YU.[en_title][J].Control Theory and Technology,2008,6(2):208~214.[Copy]

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Wen'anZHANG,LiYU
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Received:July 31, 2006Revised:January 25, 2007

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Integral-inequality approach to delay-dependent robust H-infinity control for uncertain neutral systems

Wen'an ZHANG, Li YU

(Department of Automation, Zhejiang University of Technology, Hangzhou Zhejiang 310032, China)

Abstract:

This paper focuses on the design problem of a memoryless state feedback robust H-infinity controller for a class of uncertain neutral systems. By using a newly established integral inequality, a new delay-dependent bounded real lemma for such systems is derived without involving a fixed model transformation. Furthermore, new delay-dependent sufficient conditions for the existence of robust H-infinity controllers are presented in terms of nonlinear matrix inequalities. A design procedure involving an iterative algorithm is also proposed to design such controllers. Numerical examples are given to demonstrate the less conservatism of the proposed method.

Key words: Neutral systems Uncertain systems Delay-dependent criteria H-infinity control Integral-inequality