Aiming at the fault that the speed signal of the automatic transmission output shaft Hall-type speed sensor fluctuates abnormally due to the change of the air gap, the method of fault detection and diagnosis is proposed. Firstly, a limited low-pass filter module was designed according to the characteristics of the fault, and a good filter effect is achieved. Secondly, by comparing the signals before and after filtering, a residual generator is designed, and an adaptive dynamic threshold is designed by analyzing the causes and influencing factors of the residual, which can configure a reliable and effective threshold for the generated residual in real time, which improves the fault identification robustness and effectiveness. Then, a fault debounce method is designed to avoid frequent false alarms of occasional faults. Finally, simulation verification proves the effectiveness of the method.
Detection and Diagnosis of Speed Sensor Air Gap Change Fault
Sae Technical Papers
SAE 2022 Vehicle Electrification and Powertrain Diversification Technology Forum ; 2022
2022-10-28
Aufsatz (Konferenz)
Englisch
Detection and Diagnosis of Speed Sensor Air Gap Change Fault
British Library Conference Proceedings | 2022
|BASE | 2016
|BASE | 2016
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