| Adaptive Observer-Based Fault Estimate for Nonlinear Systems |
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| 作者姓名： | 宗群 刘文静 刘利 |
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| 作者单位： | School of Electrical Engineering and Automation Tianjin University，School of Electrical Engineering and Automation Tianjin University，School of Electrical Engineering and Automation Tianjin University，Tianjin 300072 China Tianjin 300072 China Tianjin 300072 China |
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| 摘 要： | In recent years, fault detection and isolation(FDI) technologies have been developing rapidly.Among them the observer-based fault detection andisolation technology for nonlinear systems are the mostattractive research areas, and lots of promising resultscan be found in survey papers1]. Generally, thereare several kinds of strategies for observer-based FDIin nonlinearsystems such as unknown inputs observer-based FDI2], and adaptive observer-based FDI3]. Insome cases, fault accommodation…
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| 关 键 词： | 自适应观测器 缺陷评估 非线性系统 H-无限轨迹性能 |
| 收稿时间： | 2006-07-21 |
Adaptive Observer-Based Fault Estimate for Nonlinear Systems |
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| ZONG Qun,LIU Wenjing,LIU Li.Adaptive Observer-Based Fault Estimate for Nonlinear Systems[J].Transactions of Tianjin University,2006,12(6):425-428. |
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| Authors: | ZONG Qun LIU Wenjing LIU Li |
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| Abstract: | An approach for adaptive observer-based fault estimate for nonlinear system is proposed.H-infinity theory is applied to analyzing the design method and stable conditions of the adaptive observer, from which both system state and fault can be estimated. It is proved that the fault estimate error is related to the given H-infinity track performance indexes,as well as to the changing rate of the fault and the Lipschitz constant of the nonlinear item.The design steps of the adaptive observer are proposed.The simulation results show that the observer has good performance for fault estimate even when the system includes nonlinear terms, which confirms the effectiveness of the method. |
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| Keywords: | adaptive observer fault estimate nonlinear system H-infinity track performance |
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