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		Ying ZHOU,Yuqiang WU,Shumin FEI.[en_title][J].Control Theory and Technology,2005,3(3):280~286.[Copy]

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YingZHOU,YuqiangWU,ShuminFEI
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Received:August 19, 2004Revised:August 22, 2005

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Adaptive control of linear multivariable systems with high frequency gain matrix hurwitz

Ying ZHOU, Yuqiang WU, Shumin FEI

(Research Institute of Automation,Southeast University,Nanjing Jiangsu 210096,China;Institute of Automation,Qufu Normal University,Qufu Shandong 273165,China)

Abstract:

A new adaptive control scheme is proposed for multivariable model reference adaptive control(MRAC) systems based on the nonlinear backstepping approach with vector form.The assumption on a priori knowledge of the high frequency gain matrix in existing results is relaxed and the new required condition for the high frequency gain matrix can be easily checked for certain plants so that the proposed method is widely applicable.This control scheme guarantees the global stability of the closed-loop systems and the tracking error can be arbitrary small.The simulation result for an application example shows the validity of the proposed nonlinear adaptive scheme.

Key words: Vector backstepping method Global stability MIMO systems