Diagnosability and sensor reduction
Ethan A. Scarl · 2002
Device-centered model-based reasoning (MBR) models are used to determine the diagnosability of individual components and of the system as a whole. Given a satisfactory device-centered model that can be used dependably for diagnosis, the author first considers the specification of diagnosability for individual components. This is expressed through uniqueness requirements for the isolation of faults in those components. The diagnosability of the system as a whole is a composite of the diagnosability of its components. This leads one to a criterion for determining the diagnostic value to the system of individual sensors. This criterion permits the maximization of system diagnosability with a fixed number of sensors or, conversely, minimizing the number of sensors required to achieve a given standard of system diagnosability.>