THE RELAXATION PSEUDOCIRCUIT METHOD FOR ANALOG FAULT-DIAGNOSIS

An efficient frequency domain relaxation pseudocircuit (RPC) approach is proposed and the associated solvability conditions are derived for analogue fault diagnosis. In this approach all the elements in the cir cuit are described by the associated relaxation models and the solutio n of the RPC is obtained iteratively by the phasor technique. Conseque ntly the diagnostic process is unified in the frequency domain and bot h the development of the theory and the implementation for practical a pplication are made easier via this unified approach. Besides, both th e order of the RPC and the measurement cost are reduced. This is usefu l especially when a high-e network is involved or the solution is hard to obtain in the time domain. Two examples are illustrated to show th e efficacy of the proposed method.