Abstract
A new Petri-net based approach is proposed for FDI of hybrid systems. It consists of three components: first, one derives a model of the overall discrete state of the system, in which both stochastic failure events and deterministic control events interact; faults are modeled as the hidden discrete state part of the system. Second, the continuous state part is modeled and ones shows how it can be linked to the hidden discrete part, through statistical residual generation. Third, diagnosis is performed by a Viterbi-type algorithm, which estimates the most likely sequence of hidden failed states, given a sequence of residuals.
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