Sensor fault detection method
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United States of America Patent
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Nov 20, 2018
Grant Date -
Jan 18, 2018
app pub date -
Jun 29, 2017
filing date -
Jul 13, 2016
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Abstract
A method of determining a faulty sensor of a sensor array of a gas turbine engine, the sensor array including at least first, second and third sensors, the method including the steps of: measuring a first set of sensor outputs prior to engine startup from each sensor, and calculating a first difference in the measured value for each sensor pair; after a period of time, measuring a second set of sensor outputs prior to engine startup from each sensor, and calculating a second difference in measured value for each sensor pair; calculating a further difference between the calculated first and second differences for each sensor pair; and identifying a failed sensor where two or more sensor pairs including a common sensor have a further difference above a predetermined threshold.
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