| 具有线性输出结构的非线性系统故障诊断和容错控制 |
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| 引用本文： | 王宏,沈岭,岳红. 具有线性输出结构的非线性系统故障诊断和容错控制[J]. 应用科学学报, 2005, 23(6): 620-624 |
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| 作者姓名： | 王宏 沈岭 岳红 |
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| 作者单位： | 中科院自动化研究所, 北京 100080 |
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| 基金项目： | 中科院知识创新工程重大项目(KGCX-SW-15) |
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| 摘 要： | 研究了一类具有线性输出结构的非线性系统故障诊断和容错控制,利用自适应观测器来构造线性残差,同时构造李亚普诺夫函数,使其一阶导数为负来得到故障估计值,容错控制部分设计了2个自适应观测器,通过控制器重组使故障发生后的系统输出跟踪原系统输出.理论分析和仿真结果证明了该方法的有效性.
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| 关 键 词： | 自适应观测器 故障诊断 非线性系统 李亚普诺夫函数 容错控制 |
| 文章编号： | 0255-8297（2005）06-0620-05 |
| 收稿时间： | 2004-06-30 |
| 修稿时间： | 2004-06-302004-09-24 |
Fault Diagnosis and Fault-Tolerance Control for Nonlinear Systems with Linear Output Structure |
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| WANG Hong,SHEN Ling,YUE Hong. Fault Diagnosis and Fault-Tolerance Control for Nonlinear Systems with Linear Output Structure[J]. Journal of Applied Sciences, 2005, 23(6): 620-624 |
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| Authors: | WANG Hong SHEN Ling YUE Hong |
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| Affiliation: | Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | A new formulation of fault diagnosis and fault-tolerant control algorithm is presented for a class of nonlinear dynamic systems with a linear output structure.A Lyapunov-based adaptive observer is proposed to produce a residual signal.The fault estimate guarantees negativity of the first order derivative of the Lyapunov function using Lyapunov analysis.Two adaptive observers are designed for fault-tolerant control,and the system output after occurrence of a fault tracks the output of the original system through a nonlinear controller reconfiguration.Simulation results show the effectiveness of the proposed algorithm. |
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| Keywords: | nonlinear systems Lyapunov function adaptive observers fault diagnosis fault-tolerant control |
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