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 L ipschitz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 .
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.
出处
《应用科学学报》
CAS
CSCD
2002年第2期153-159,共7页
Journal of Applied Sciences