基于自适应观测器的非线性系统故障诊断  

An Adaptive Observer Based Fault Diagnosis for Nonlinear Systems

作　　者：王小丽[1] 倪茂林[1] 

机构地区：[1]北京控制工程研究所

出　　处：《空间控制技术与应用》2008年第4期33-37,46,共6页Aerospace Control and Application

基　　金：国家自然科学基金(60774002,90405017);973课题(2002CB312200)

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。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.

关 键 词：故障诊断 非线性系统 自适应观测器 反作用飞轮 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]