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应用科学学报 ›› 2005, Vol. 23 ›› Issue (6): 620-624.

• 论文 • 上一篇    下一篇

具有线性输出结构的非线性系统故障诊断和容错控制

王宏, 沈岭, 岳红   

  1. 中科院自动化研究所, 北京 100080
  • 收稿日期:2004-06-30 修回日期:2004-09-24 出版日期:2005-11-30 发布日期:2005-11-30
  • 作者简介:王宏(1960-),男,甘肃庆阳人,教授,博导,E-mail:hong.wang@umist.ac.uk
  • 基金资助:
    中科院知识创新工程重大项目(KGCX-SW-15)

Fault Diagnosis and Fault-Tolerance Control for Nonlinear Systems with Linear Output Structure

WANG Hong, SHEN Ling, YUE Hong   

  1. Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2004-06-30 Revised:2004-09-24 Online:2005-11-30 Published:2005-11-30

PDF

65

被引次数

7

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.

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

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.

Key words: fault-tolerant control, nonlinear systems, Lyapunov function, adaptive observers, fault diagnosis

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