System and method for combining diagnostic evidences for turbine engine fault detection
First Claim
1. A fault detection system for detecting faults in a turbine engine, the system comprising:
- a plurality of fault detectors, the plurality of fault detectors adapted to receive device data from the turbine engine and determine a plurality of fault conclusions from the device data; and
a diagnostic aggregation mechanism, the diagnostic aggregation mechanism adapted to receive the plurality of fault conclusions and utilize at least one valid multiple fault set to aggregate the plurality of fault conclusions and isolate a likely fault in the turbine engine.
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Abstract
A system and method for combining conclusions from multiple fault detection techniques to isolate likely faults in a turbine engine is provided. The system and method provide the ability to effectively deal with multiple concurrent faults in the engine. Additionally, the embodiments of the invention provide the ability to correctly characterize multiple conclusions generated from evidence having different levels of interdependence. In one embodiment, the conclusions based on device data with high dependency are aggregated using a high dependency aggregation rule, and the resulting high-dependency sets are then further aggregated using a weak dependency rule. Finally, any conclusions based on independent evidence can be aggregated using an independent combination rule. The resulting aggregation determines which fault(s) are most likely indicated by the plurality of conclusions, taken into account the dependency of the device data used to generate the conclusions.
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Citations
19 Claims
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1. A fault detection system for detecting faults in a turbine engine, the system comprising:
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a plurality of fault detectors, the plurality of fault detectors adapted to receive device data from the turbine engine and determine a plurality of fault conclusions from the device data; and
a diagnostic aggregation mechanism, the diagnostic aggregation mechanism adapted to receive the plurality of fault conclusions and utilize at least one valid multiple fault set to aggregate the plurality of fault conclusions and isolate a likely fault in the turbine engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of detecting faults in a turbine engine, the method comprising the steps of:
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receiving device data from the turbine engine;
determining a plurality of fault conclusions using a plurality of fault detection techniques, the plurality of fault detection techniques each using a subset of the device data; and
isolating likely faults by utilizing at least one valid multiple fault set to aggregate the plurality of fault conclusions and isolate a likely fault in the turbine engine. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A program product comprising:
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a) a fault detection program for predicting fault in a turbine engine, the fault detection program including;
a plurality of fault detectors, the plurality of fault detectors adapted to receive device data from the turbine engine and determine a plurality of fault conclusions from the device data; and
a diagnostic aggregation mechanism, the diagnostic aggregation mechanism adapted to receive the plurality of fault conclusions and utilize at least one valid multiple fault set to aggregate the plurality of fault conclusions and isolate a likely fault in the turbine engine; and
b) computer-readable signal bearing media bearing said program.
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Specification