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Qualitative and quantitative approaches to the diagnosis of plant faults

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3 Author(s)
Jones, A.H. ; Centre for Instrum. & Autom., Salford Univ., UK ; Porter, B. ; Fripp, R.N.

The architecturally relevant issues which arise in the development of both qualitative and quantitative fault-diagnostic systems are discussed, and the technical issues of acquiring the knowledge and using it effectively are addressed. A direct comparison is drawn between the performances of both fault-detection systems while detecting the same fault on a laboratory test rig. It is concluded that fault-diagnostic systems must be sensitive to the appearance of faults but robust enough not to produce false alarms. It is also concluded that the fault signatures associated with plant-transgression-based methods are stronger, and therefore easier to detect, than model-based transgressions. However, the model-based approach can be extremely effective at detecting faults which manifest themselves as changes in internal plant dynamics

Published in:

Intelligent Control, 1988. Proceedings., IEEE International Symposium on

Date of Conference:

24-26 Aug 1988