Abstract:

Fault diagnosis is crucial for ensuring the safe operation of complex engineering systems. These systems are typically hybrid in nature, therefore, model-based diagnosis requires hybrid system models. Previous work in hybrid systems diagnosis, however, has focused either on parametric or discrete faults. We present an integrated approach for diagnosis of both parametric and discrete faults in hybrid systems that encompasses a compact hybrid systems modeling approach and an efficient qualitative fault isolation scheme. Experimental results from a case study performed on a complex electrical power system demonstrate the effectiveness of the approach.

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