基于观测器的闭环系统故障检测及其在飞控系统中的应用  

Observer-based fault detection for closed-loop systems and its application to flight control system

作　　者：赵钦君[1] 姜斌[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016

出　　处：《东南大学学报（自然科学版）》2005年第A02期1-4,共4页Journal of Southeast University：Natural Science Edition

基　　金：教育部流程工业自动化重点实验室;江苏省"六大人才高峰"工程;南京航空航天大学科研创新基金资助项目

摘　　要：通过在闭环系统中加观测器,并基于实际飞行控制系统中控制器经常饱和的考虑,对执行器、反馈传感器故障进行了Matlab仿真研究.通过结果分析,提出了一种获取残差的新方法:即把控制器的输出残差和观测器的输出残差结合起来检测故障.该方法对于实际系统可能发生的各种故障更为有效,可以提高系统检测故障的性能,减小漏报率.针对一个飞行控制系统的仿真结果表明:新提出的诊断方案是有效的.This paper investigates the detection problem of actuator faults and feedback sensor faults in singleinput single-output （SISO） closed-loop control system, adding an observer to the closed-loop system and considering that flight control system＇s controller is often subjected to saturation. By analyzing the results, a novel method of generating residual is presented, which combines the controller output and the observer output to detect the faults. The new method is effective to several kinds of faults in practical systems and detection performance can be improved. Simulation results of a flight control system show the efficiency of the proposed method.

关 键 词：闭环系统 故障检测 残差 观测器 控制器饱和 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]