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应用科学学报 ›› 2002, Vol. 20 ›› Issue (2): 153-159.

• 论文 • 上一篇    下一篇

故障系统状态观测器及其在一类非线性系统故障诊断中的应用

陈玉东, 施颂椒, 翁正新   

  1. 上海交通大学自动化研究所, 上海 200030
  • 收稿日期:2001-03-16 修回日期:2001-05-29 出版日期:2002-06-30 发布日期:2002-06-30
  • 作者简介:陈玉东(1972-),男,河北唐山人,博士生;施颂椒(1933-),男,上海人,教授,博导.

The Faulty Systems State Observer and Its Application to Fault Diagnosis in a Class of Nonlinear Systems

CHEN Yu-dong, SHI Song-jiao, WENG Zheng-xin   

  1. Institute of Automation Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2001-03-16 Revised:2001-05-29 Online:2002-06-30 Published:2002-06-30

PDF

77

被引次数

2

摘要： 首次提出了故障系统状态观测器(FSSO)的概念,分析了FSSO与传统观测器的区别,指出了FSSO的两种可能的结构形式;针对一类满足Lipschitz条件的非线性、有界不确定性系统,提出了一种基于FSSO的新型鲁棒故障诊断方法,分析了诊断方法的鲁棒性和灵敏度.该方法不但能够检测、分离故障,而且能够给出故障信号随时间变化的特性估计.仿真结果验证了该方法的有效性.

关键词: 非线性系统, 不确定性, 故障诊断, 状态观测器

Abstract: The concept of faulty systems state observer (FSSO) is presented for the first time. The difference between FSSO and the traditional observer is analysed, and two possible structures for FSSO are pointed out. A new robust fault diagnosis method based on FSSO for a class of nonlinear systems with bounded uncertainties satisfying Lipschitz condition is proposed and its robustness and sensitivity are also analysed. This method can detect and isolate faults. It can also estimate the characteristics of the fault signal which varies with time. The result of the simulation indicates its validity.

Key words: nonlinear systems, uncertainty, fault diagnosis, state observer

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