Sensor fault detection with single sensor parity relation
- National Tsing-Hua Univ., Hsinchu (Taiwan, Province of China)
A sensor fault detection method combining the single sensor parity relation (SSPR) with the likelihood ratio test (LRT) is described. The SSPR is in an algebraic form that correlates system dynamics with multistep readings of a sensor and is therefore fast running. The scheme can easily be duplicated for each sensor of interest and thus has advantages for modular design and parallel processing. In the fault detection architecture, residuals generated from the SSPR module are examined by an LRT module for failure signatures. The likelihood ratios are maximized according to the fault occurrence time to improve detection sensitivity and are then calculated using a recursive form to match the speed of the SSPR module. The proposed concept is demonstrated with hypothetical sensor failures for pressurizer instruments. Comparisons with the Kalman filtering technique and the sequential probability ratio test are discussed.
- OSTI ID:
- 6481047
- Journal Information:
- Nuclear Science and Engineering; (United States), Journal Name: Nuclear Science and Engineering; (United States) Vol. 114:2; ISSN NSENAO; ISSN 0029-5639
- Country of Publication:
- United States
- Language:
- English
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220400* -- Nuclear Reactor Technology-- Control Systems
COMPARATIVE EVALUATIONS
CONTROL SYSTEMS
CORRELATIONS
DESIGN
DETECTION
DIGITAL FILTERS
ERRORS
EVALUATION
FAILURES
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
PARALLEL PROCESSING
POWER PLANTS
PROGRAMMING
REACTOR CONTROL SYSTEMS
REACTOR INSTRUMENTATION
REACTOR MONITORING SYSTEMS
RELIABILITY
THERMAL POWER PLANTS