Diagnosis of Multiple Faults in Dynamic Systems

Abstract

A new fault diagnostic method is proposed to diagnose the multiple faults in dynamic systems. This system consists on-line model identification, on-line fault detection and off-line fault identification which are further divided into fault location and fault estimation. The fault location is executed by a multiple hypothesis test method on physical parameters for both single and multiple faults. The characteristics of the fault location are analyzed by introducing orthogonal projections on subspaces in the Euclid vector space. The results of simulation studies on motor-driving systems are explained.