基于自适应原理的传感器增益故障诊断方法

Malfunction Diagnosis Based on Adaptive Principle for Sensor Gain Fault

基于自适应原理提出一种传感器增益故障诊断方法。首先将传感器增益故障表示为传感器偏差故障 ,再将其表示为执行机构故障 ,利用自适应原理估计出传感器偏差故障幅度 ,最后用最小二乘法估计出增益故障幅度。分别对有、无系统噪声和模型误差的情况进行了讨论 ,最后给出仿真结果。

The paper presents adaptive diagnosis method for sensor fault.First,the sensor gain fault is expressed as sensor error,then the sensor error is estimated by means of adaptive principle,at last the sensor gain fault is derived by the least square method.Both case in which the model error and the noise field are discussed,finally,simulation results are given.