控制系统传感器增益故障的一种鲁棒诊断方法

本文基于状态观测器，提出了一种模型含有不确定性误差情况下，传感器增益漂移故障的诊断与分离方法。作者通过一个辅助系统产生故障特征信号，然后采用拟合的方法，从观测器残差中提取出故障信息，从而实现故障的诊断与分离。

A ROBUST FAULT DIAGNOSIS METHODOLOGY FOR SENSOR GAIN DRIFTING IN DYNAMIC SYSTEMS

Based on state observer,the paper discusses the fault detection and isolation methodology forsensor gain drifting in dynamic systems with uncertainties, First,we decompose the residual of state observerinto two terms:the term resulted from sensor fault and the term resulted from model uncertainty,Then weextract the first term from the residual via optimization with the aid of fault characteristic signal generated byan auxiliary system. Hence the fault is detected and isolated.