Detection and reconstruction of sensor faults
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United States of America Patent
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Feb 12, 2019
Grant Date -
Jan 25, 2018
app pub date -
Jul 19, 2016
filing date -
Jul 19, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and systems are provided for detecting faults in a sensor and reconstructing an output signal without use of the faulty sensor. In one embodiment, a method includes: receiving, by a processor, sensor data indicating a measured value from a first sensor; receiving, by a processor, sensor data indicating measured values from a plurality of other sensors; computing, by a processor, virtual values based on a vehicle model and the sensor data from the plurality of other sensors; computing, by a processor, a residual difference between the measured value from the first sensor and the virtual values; detecting, by a processor, whether a fault exists in the first sensor based on the residual difference; and when a fault in the sensor is detected, generating, by a processor, a control value based on the virtual values instead of the measured value.
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