Sensor placement for diagnosability in space-borne systems - A model-based reasoning approachThis paper presents an approach to evaluating sensor placements on the basis of how well they are able to discriminate between a given fault and normal operating modes and/or other fault modes. In this approach, a model of the system in both normal operations and fault modes is used to evaluate possible sensor placements upon the basis of three criteria. Discriminability measures how much of a divergence in expected sensor readings the two system modes can be expected to produce. Accuracy measures confidence in the particular model predictions. Timeliness measures how long after the fault occurrence the expected divergence will take place. These three metrics then can be used to form a recommendation for a sensor placement. This paper describes how these measures can be computed and illustrated these methods with a brief example.
Document ID
19920047012
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chien, Steve (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Doyle, Richard (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Rouquette, Nicolas (JPL Pasadena, CA, United States)