METHOD AND SYSTEM FOR DETECTION OF ERRATIC SENSOR USING A DYNAMIC THRESHOLD

摘要

A system and method for detecting an erratic state of a monitored sensor includes generating a variation value for a monitored signal generated by a monitored sensor and a variation value for an estimated signal estimated based on a predictive signal generated by predictive sensor, where the predictive signal is predictive of the monitored signal. The monitored signal can rapidly fluctuate based on system operating conditions. A dynamic threshold value is generated based on the estimated variation value, and the monitored signal is compared with the dynamic threshold value to determine if the monitored signal is in an erratic state. The detection method is sufficiently sensitive to distinguish between rapid fluctuation of the monitored sensor and an erratic state.

主权项

1. A method of diagnosing an erratic sensor, the method comprising:
receiving a monitored signal from a monitored sensor; receiving a predictive signal from a predictive sensor; determining an estimated signal based on the predictive signal; wherein the estimated signal is an estimate of the monitored signal; determining a monitored variation value of the monitored signal; determining a estimated variation value of the estimated signal; generating a dynamic threshold value based on the estimated variation value; determining a state of the monitored sensor based on a comparison of the monitored variation value and the dynamic threshold value.