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State-of-health monitoring and fault diagnosis with adaptive thresholds for integrated vehicle stability system
State-of-health monitoring and fault diagnosis with adaptive thresholds for integrated vehicle stability system
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机译:具有自适应阈值的健康状态监测和故障诊断,用于集成的车辆稳定系统
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摘要
A system and related method for monitoring the state of health of sensors in an integrated vehicle stability control system. In one embodiment, the system determines whether a yaw rate sensor, a lateral acceleration sensor or a hand-wheel angle sensor has failed. The system uses a plurality of models to generate estimates of the outputs of the sensors based on the actual sensor measurements. Residuals are generated as the difference between the measured value and each of the estimates for the particular sensor. The residuals are compared to a threshold to determine whether a fault flag will be set for each residual. The threshold for the hand-wheel angle sensor is an adaptive threshold because it does not have physical redundancy. If the fault flags for the residuals for each sensor have a particular pattern, then a fault is output for that sensor.
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