Diagnosability of Discrete Event Systems with Modular Structure |
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Authors: | Olivier Contant Stéphane Lafortune Demosthenis Teneketzis |
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Affiliation: | (1) Department of Electrical Engineering and Computer Science, The University of Michigan, 1301 Beal Avenue, Ann Arbor, MI 48109–2122, USA |
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Abstract: | The diagnosis of unobservable faults in large and complex discrete event systems modeled by parallel composition of automata
is considered. A modular approach is developed for diagnosing such systems. The notion of modular diagnosability is introduced
and the corresponding necessary and sufficient conditions to ensure it are presented. The verification of modular diagnosability
is performed by a new algorithm that incrementally exploits the modular structure of the system to save on computational effort.
The correctness of the algorithm is proved. Online diagnosis of modularly diagnosable systems is achieved using only local
diagnosers.
*Olivier Contant is now working at Microsoft Corporation. |
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Keywords: | Distributed systems Diagnosability Modularity Common events |
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