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.


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    Title :

    Detection and Diagnosis of Speed Sensor Air Gap Change Fault


    Additional title:

    Sae Technical Papers


    Contributors:
    Mao, Feihong (author) / Wang, Kaifeng (author) / Yao, Kun (author) / Dong, Peng (author) / Wang, Shuhan (author) / Zheng, Wei (author) / Xu, Xiangyang (author) / Zhang, Xiujuan (author) / Huang, Yajun (author) / Liu, Yi (author)

    Conference:

    SAE 2022 Vehicle Electrification and Powertrain Diversification Technology Forum ; 2022



    Publication date :

    2022-10-28




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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