Timed Residuals for Fault Detection and Isolation in Discrete Event Systems

Abstract : In this paper a new attempt for fault detection and isolation in discrete event systems is proposed. An identified model constitutes a timed observer of the fault-free system behavior. Non-acceptable plant operation is detected by comparing the behavior of the model with the observed system output. For fault isolation, timed residuals and generic fault symptoms - early and late events - are introduced. Time bounds are composed using Boolean conditions and statistical analysis. In case of a fault, timed and untimed residuals are concluded in order to refine a set of potential faulty candidates. The method is applied to the given benchmark system of a virtual production plant with an external controller.
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Stefan Schneider, Lothar Litz, Mickaël Danancher. Timed Residuals for Fault Detection and Isolation in Discrete Event Systems. 3rd International Workshop on Dependable Control of Discrete Systems - DCDS 2011, Jun 2011, Saarbrücken, Germany. pp.35--40, ⟨10.1109/DCDS.2011.5970315⟩. ⟨hal-00595107⟩

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