In-range sensor fault detection
AssigneePratt & Whitney Canada Corp.
InventorsSaadi Daftari, Hai Tao Wu
Life of this patent
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Abstract
Herein provided are methods and systems for detecting in-range faults for a sensor of an aircraft engine control system. A plurality of in-range values produced by the sensor are received. At least one rate reversal event, indicative of a variation in the rate-of-change of the plurality of in-range values exceeding a predetermined variance threshold, is detected. A count of rate reversal events during a predetermined time period is determined. A faulty status to the sensor is assigned based on the count of rate reversal events exceeding a predetermined limit.
Claims20
A method for detecting in-range faults for a sensor of an aircraft engine control system, comprising:
- receiving a plurality of in-range values produced by the sensor;
- detecting at least one rate reversal event indicative of a variation in the rate-of-change of the plurality of in-range values exceeding a predetermined variance threshold;
- determining a count of rate reversal events during a predetermined time period;
- and
- assigning a faulty status to the sensor based on the count of rate reversal events exceeding a predetermined limit.
An aircraft engine sensor control system communicatively coupled to a sensor, comprising:
- a processing unit;
- and
- a non-transitory computer-readable memory communicatively coupled to the processing unit and comprising computer-readable program instructions executable by the processing unit for:
- receiving a plurality of in-range values produced by the sensor;
- detecting at least one rate reversal event indicative of a variation in the rate-of-change of the plurality of in-range values exceeding a predetermined variance threshold;
- determining a count of rate reversal events during a predetermined time period;
- and
- assigning a faulty status to the sensor based on the count of rate reversal events exceeding a predetermined limit.
Dependencies are inferred from the claim text.