The invention discloses a vehicle and a steering-by-wire variable transmission ratio control method and device, wherein the control method comprises the steps: obtaining real-time vehicle data which comprises a steering wheel parameter, a vehicle speed parameter and a vehicle stability factor; determining a reference transmission ratio according to steering wheel parameters; determining a first gain coefficient based on a pre-calibrated first preset vehicle speed gain model according to the vehicle speed parameter; determining a steering sensitivity correction coefficient according to the vehicle speed parameter and the vehicle stability factor; correcting the reference transmission ratio according to the steering sensitivity correction coefficient and the first gain coefficient to obtain a target variable transmission ratio; and performing steering control according to the target variable transmission ratio. The transmission ratio gain coefficient is corrected in real time through the vehicle speed and the vehicle stability factor, so that different vehicle driving conditions are matched with different variable transmission ratios, and different driving feelings are achieved.

    本发明公开了一种车辆及其线控转向变传动比控制方法、装置,该控制方法包括:获取实时车辆数据,实时车辆数据包括方向盘参数、车速参数和车辆稳定性因数;根据方向盘参数确定基准传动比;根据车速参数,基于预先标定的第一预设车速增益模型,确定第一增益系数;根据车速参数和车辆稳定性因数确定转向灵敏度修正系数;根据转向灵敏度修正系数及第一增益系数对基准传动比进行修正,得到目标变传动比;根据目标变传动比进行转向控制。本发明通过车速、车辆稳定性因数对传动比增益系数进行实时修正,以使不同的车辆行驶工况匹配不同的变传动比,实现不同的驾驶感受。


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    Title :

    Vehicle and steer-by-wire variable transmission ratio control method and device


    Additional title:

    车辆及其线控转向变传动比控制方法、装置


    Contributors:
    GAO SHANG (author) / JIANG TINGLONG (author) / CHANG XIUYAN (author) / HOU HUIXIAN (author)

    Publication date :

    2022-01-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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