| Robust adaptive controller design for a class of nonlinear systems with unknown high frequency gains |
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| 作者姓名： | 柯海森 叶旭东 |
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| 作者单位： | Department of Electrical Engineering Zhejiang University Hangzhou 310027 China，Department of Electrical Engineering Zhejiang University Hangzhou 310027 China |
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| 基金项目： | Project supported by the National Natural Science Foundation ofChina (No. 60474010), and the Scientific Research Foundation for theReturned Chinese Scholars, State Education Ministry, China |
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| 摘 要： | INTRODUCTIONMany researchers have devoted their energy to the development of nonlinear system with unknown control directions during the past few years. The class of nonlinear system has been developed greatly since Mudgett and Morse (1985) relaxed the assumption that the unknown multiplicative terms are not only sign-invariant but also have known signs. A method called correction vector approach was proposed in (Lozano et al., 1990) and has been applied to design adaptive controller of …
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| 关 键 词： | 鲁棒控制 自适应控制 非线性系统 高频增益 |
| 收稿时间： | 2005-05-20 |
| 修稿时间： | 2005-11-25 |
Robust adaptive controller design for a class of nonlinear systems with unknown high frequency gains |
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| Hai-sen Ke,Xu-dong Ye.Robust adaptive controller design for a class of nonlinear systems with unknown high frequency gains[J].Journal of Zhejiang University Science,2006,7(3):315-320. |
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| Authors: | Hai-sen Ke Xu-dong Ye |
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| Institution: | (1) 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 multi-plicative 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. |
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| Keywords: | Robust control Adaptive control Logic-based switching Nonlinear system |
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