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		Qiangde WANG,Yuanwei JING,Siying ZHANG.[en_title][J].Control Theory and Technology,2004,2(2):117~120.[Copy]

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QiangdeWANG,YuanweiJING,SiyingZHANG
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Received:March 28, 2003Revised:December 11, 2003

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Adaptive practical output tracking of a class of nonlinear systems

Qiangde WANG, Yuanwei JING, Siying ZHANG

(Institute of Automation, Qufu Normal University, Qufu Shandong 273165, China;School of Information Science and Engineering, Northeastern University Box 321, Shenyang Liaoning 110004, China)

Abstract:

Focus is laid on the adaptive practical output-tracking problem of a class of nonlinear systems with high-order lower-triangular stmcture and uncontrollable unstable linearization. Using the modified adaptive addition of a power integrator technique as a basic tool, a new smooth adaptive state feedback controller is designed. This controller can ensure all signals of the closed-loop systems are globally bounded and output tracking error is arbitrary small.

Key words: Adaptive practical output tracking Adaptive smooth state feedback Uncontrollable unstable linearization