基于鲁棒故障检测滤波器的传感器故障诊断

本文讨论了鲁棒故障检测滤波器在喷气式发动机传感器故障诊断中的应用。鲁棒故障检测滤波器方法使残差既有干扰解耦特性又有方向特性。该滤波器的设计结合了未知输入观测器原理与Beard故障检测滤波器原理。利用未知输入观测器产生的残差对未知输入(干扰)具有鲁棒性,而特定方向性是基于BFDF技术获得的。最后举例说明了该方法的可行性和有效性。

Sensors Fault Diagnosis Based on Robust Fault Detection Filters

This paper discusses the robust fault isolation of faulty sensors in a jet engine system.The robust fault detection filters can ensure that the residual error, generated by this filter,has both robust and directional properties.This fault detection filter is designed by combining the unknown input observer and Beard fault detection filter principles.The disturbance de-coupling conditions are satisfied by the use of the full-order unknown input observer.The fault detection filter makes the residual error have the directional property.Simulation results show that mis-isolation of faults can be avoided by using the robust scheme.