Journal
SENSORS
Volume 9, Issue 11, Pages 8579-8592Publisher
MDPI
DOI: 10.3390/s91108579
Keywords
fault detection; directed graph; reliability; false alarm; missed alarm
Funding
- National Natural Science Foundation of China [60736026, 60904044]
- China Postdoctoral Science Foundation [20080440386]
- NSERC (Natural Sciences and Engineering Research Council of Canada)
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To improve fault detection reliability, sensor location should be designed according to an optimization criterion with constraints imposed by issues of detectability and identifiability. Reliability requires the minimization of undetectability and false alarm probability due to random factors on sensor readings, which is not only related with sensor readings but also affected by fault propagation. This paper introduces the reliability criteria expression based on the missed/false alarm probability of each sensor and system topology or connectivity derived from the directed graph. The algorithm for the optimization problem is presented as a heuristic procedure. Finally, a boiler system is illustrated using the proposed method.
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