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On-Line Diagnosis of Unrestricted Faults

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2 Author(s)
Meyer, J.F. ; Department of Computer and Communication Sciences and the Department of Electrical and Computer Engineering (Program in Computer, Information, and Control Engineering), University of Michigan ; Sundstrom, R.J.

A formal model for the study of on-line diagnosis is introduced and used to investigate the diagnosis of unrestricted faults. Within this model a fault of a system S is considered to be a transformation of S into another system S' at some time r. The resulting faulty system is taken to be the system which looks like S up to time r and like S' thereafter. Notions of fault tolerance and error are defined in terms of the resulting system being able to mimic some desired behavior as specified by a system S. A notion of on-line diagnosis is formulated which involves an external detector and a maximum time delay within which every error caused by a fault in a prescribed set must be detected.

Published in:

Computers, IEEE Transactions on  (Volume:C-24 ,  Issue: 5 )