Title :
Time-domain fault diagnosis of analogue circuits in the presence of noise
Author :
Brygilewicz, V. ; Wojciechowski, J.
Author_Institution :
Inst. of Radioelectron., Warsaw Univ. of Technol., Poland
fDate :
4/1/1998 12:00:00 AM
Abstract :
An approach to multiple fault diagnosis in dynamic linear and nonlinear circuits based on testing of actual and simulation of nominal circuit is presented. Time domain integral sensitivity is used for constructing test equations. An adaptive algorithm for selecting time intervals for integral sensitivity is included. The least squares approach (LSA) to solve overdetermined diagnosis equations with noisy data is used in conjunction with the regularisation method of Tikhonov. Three illustrative examples show applications of the method
Keywords :
analogue circuits; circuit noise; fault diagnosis; least squares approximations; linear network analysis; nonlinear network analysis; time-domain analysis; adaptive algorithm; analogue circuits; dynamic linear circuits; dynamic nonlinear circuits; integral sensitivity; least squares approach; multiple fault diagnosis; noise; overdetermined diagnosis equations; regularisation method; test equations; time intervals; time-domain fault diagnosis;
Journal_Title :
Circuits, Devices and Systems, IEE Proceedings -
DOI :
10.1049/ip-cds:19981744
