一种基于全维和降维观测器的故障检测和重构方法  

A kind of fault detection and fault reconstruction based on full-order and reduced-order observers

作　　者：朱芳来[1] 岑峰[1] 董学平[2] 

机构地区：[1]同济大学电子与信息工程学院,上海200092 [2]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《控制与决策》2011年第2期258-262,270,共6页Control and Decision

基　　金：国家自然科学基金项目(61074009;60974022;60972035)

摘　　要：针对不确定性非线性系统,讨论基于观测器的执行器故障的检测和重构方法.首先,通过设计滑模全维观测器,产生对干扰具有鲁棒性、对故障具有敏感性的残差,来达到故障检测的目的;然后,设计能直接消去干扰和故障影响的降维观测器来达到状态渐近收敛估计,并在此基础上,提出故障重构方法;基于微分方程的数值解方法和函数微分的数值解方法,给出一种故障重构的数值解方法;最后,对一个实际模型进行仿真,结果表明了该方法的实用性.In this paper,the problems of actuator fault detection and reconstruction based on observers for a kind of uncertain nonlinear system are discussed.Under some assumptions,a residual which is robust to disturbance but sensitive to actuator fault is produced by designing a kind of full-order sliding model observer.Then the residual can be used to detect the actuator fault.Under the same assumptions,a reduced-order observer which can eliminate the influences of unknown disturbance and actuator fault directly is developed.A method to reconstruct the actuator fault is provided based on the reduced-order observer.After this,a kind of numerical solution for the fault reconstruction is proposed by using the some numerical methods.Finally,the simulation results on a real model show the effectiveness of the proposed method.

关 键 词：全维观测器 降维观测器 故障检测 故障重构 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]