DocumentCode :
3662947
Title :
Improving the resolution and stability of diagnostic systems
Author :
A. Rakar;D. Juricic
Author_Institution :
Jozef Stefan Inst., Ljubljana Univ., Slovenia
Volume :
1
fYear :
1998
Firstpage :
41
Abstract :
The paper addresses the problem of distinguishing between faults with the same fault signatures. It is shown that additional improvements in terms of resolution can be achieved if information about the sensitivity of the residuals with respect to faults is taken into account. When two fault signatures are qualitatively identical but have significantly different sensitivity terms, additional discrimination can be achieved by using the ratios of the underlying residuals. This extra isolability feature simplifies reasoning in the isolation stage. However, to achieve better overall performance, the diagnostic results should be stable, i.e. should not vary substantially under different operating conditions. Improved diagnostic stability is obtained by the approximate reasoning approach which relies on the transferable belief model. An outline of the ideas is given and some practical results obtained on a DC motor are provided.
Keywords :
"Stability","DC motors","Fault diagnosis","Automation","Automatic control","Control systems","System performance","Parameter estimation","Equations","Decision making"
Publisher :
ieee
Conference_Titel :
Control Applications, 1998. Proceedings of the 1998 IEEE International Conference on
Print_ISBN :
0-7803-4104-X
Type :
conf
DOI :
10.1109/CCA.1998.728241
Filename :
728241
Link To Document :
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