故障自治系统的构想

本文提出了一种故障自治系统的基本构想:即根据系统先验信息和某些状态或参数的观测,计算滤波残差和故障特征矩阵,构造能分离故障的投影算子(DPO).由故障探测分离逻辑判断系统运行是否正常,分离确立故障发生的P位,补偿由故障所造成的影响,使系统具有启动诊断治理故障的能力.本文给出了DPO算子产生的方法,论证了存在的充要条件.为了减少计算量和保持滤波器在系统运行正常时的最佳性和在有故障时对不期望变化的灵敏性,本文提出了一种故障开关滤波器.数字计算结果显示了这些方法的有效性.

Conception of Failure Self-Diagnosis System

A basic conception of a so-called failure self-diagnosis system is presented in this paper, i.e.based on a priori information and measurements of some states and parameters of a system, theresidual and failure signature matrix are computed by a computer so as to form the distinguishableprojection operators (DPO). Failure detection and isolation logic is used to determine ifthe system is operating in order and the locations of the failure and to compensate the effect ofthe failure. So the system possesses the capability of failure autodiagnosisThe sufficient and necessary conditions for the existence DPO have been proved and themethod to generate DPO is given. A failure switch filter is presented. Thus, computation canbe reduced, and the filter is kept in optimum condition when the system is in normal case andit is more sensitive to unexpected changes in case of failure. The digital computation resultsshow the effectiveness of these methods.