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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (3 ): 6-    DOI: 10.1631/jzus.2006.A0315
    
Robust adaptive controller design for a class of nonlinear systems with unknown high frequency gains
Ke Hai-sen, Ye Xu-dong
Department of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  In this note, a robust adaptive control scheme is proposed for a class of nonlinear systems that have unknown multiplicative terms. Unlike previous results, except for the unknown control directions, we do not require a priori bounds on the unknown parameters. We also allow the unknown parameters to be time-varying provided that they are bounded. Our proposed robust adaptive controller is designed to identify on-line the unknown control directions and is a switching type controller, in which the controller parameters are tuned in a switching manner via a switching logic. Global stability of the closed-loop systems have been proved.

Key words： Robust control      Adaptive control      Logic-based switching      Nonlinear system     
Received: 20 May 2005     
CLC:  TP273  
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Ke Hai-sen
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Cite this article:

Ke Hai-sen, Ye Xu-dong. Robust adaptive controller design for a class of nonlinear systems with unknown high frequency gains. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(3 ): 6-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.A0315     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/I3 /6

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