Abstract
The quality of a diagnostic system strongly depends on the availability of appropriate measurements. In this work sensor placement method using Graph of a Process is introduced. Graph of a Process is a formalization of a causal graph useful in fault diagnosis. Faults are directly incorporated into the model. The necessary and sufficient conditions for fault detectability and isolability are formulated. The analysis is divided into acyclic graph search and calculations within strongly connected components. This method is applicable to the design of the instrumentation of diagnostic systems, when the analytical process model is unavailable.
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