一类不确定非线性系统的故障诊断方法

提出一种基于观测器的残差生成器方法来达到对一类多输入多输出非线性不确定系统进行故障分离的目的。通过对待监测故障引入适当的假设,同时假定不确定性满足Lipschitz条件,设计了一种残差信号来完成故障诊断,设计过程应用了高增益观测器和自适应故障诊断观测器方法,同时不需要借助线性逼近方法。最后分析了该残差信号对于待监测故障的敏感性和对于不须报警的故障的不敏感性。

Fault Diagnosis for Nonlinear Uncertain Systems

An observer-based residual generation method is proposed for fault isolation in a class of multiple-input multiple-output nonlinear uncertain systems.Based on appropriate assumptions on the monitored faults,on some persistent excitation condition and on the Lipschitz condition in uncertainty,a residual signal for fault diagnosis is designed in constructive manner through a nontrivial combination of a recently developed high-gain observer and an adaptive fault diagnosis observer,without resorting to any line...