| 基于自适应观测器的非线性系统故障诊断 |
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| 引用本文： | 王小丽,倪茂林.基于自适应观测器的非线性系统故障诊断[J].空间控制技术与应用,2008,34(4):33-37,46. |
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| 作者姓名： | 王小丽 倪茂林 |
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| 作者单位： | 北京控制工程研究所,北京,100190;空间智能控制技术国家级重点实验室,北京,100190 |
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| 基金项目： | 国家自然科学基金(60774002,90405017); 973课题(2002CB312200) |
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| 摘 要： | 研究一类非线性系统执行器故障诊断问题。对于故障系统，建立一种自适应观测器，通过在线调整，故障后执行器的未知参数被在线逼近。所提出的自适应调整律能够保证观测器稳定及故障估计误差收敛。最后引入卫星反作用飞轮模型，对单飞轮发生故障的情况进行了仿真，结果表明提出的方法有效、可行。
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| 关 键 词： | 故障诊断 非线性系统 自适应观测器 反作用飞轮 |
An Adaptive Observer Based Fault Diagnosis for Nonlinear Systems |
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| WANG Xiaoli,NI Maolin.An Adaptive Observer Based Fault Diagnosis for Nonlinear Systems[J].Aerospace Contrd and Application,2008,34(4):33-37,46. |
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| Authors: | WANG Xiaoli NI Maolin |
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| Abstract: | The fault diagnosis for nonlinear systems is investigated in this paper.An adaptive observer is designed to estimate on-line the unknown parameters due to faults.By using an adaptively regulating algorithm,the observer is ensured to be stable and the estimation errors are guaranteed to converge.A reaction wheel model of the satellite is employed.Numerical simulations demonstrate that the proposed approach can detect the faults of a single reaction wheel,and estimate the faults effectively. |
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| Keywords: | fault diagnosis nonlinear system adaptive observer reaction wheel |
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