The invention discloses a failure control method for an electric drive system of a four-wheel distributed drive passenger car. The failure control method comprises the following steps: selecting a vehicle to enter a two-wheel drive mode or a parking mode according to a failure mode of the electric drive system; performing motor torque distribution on a non-failure motor when entering the two-wheel drive mode; calculating ideal yaw velocity under different conditions according to the reference ideal insufficient steering degree US; calculating an ideal side slip angle by combining an integralestimation method and a side slip angle upper limit empirical formula; using a fuzzy control algorithm, using errors of the yaw velocity and the side slip angle as input variables to calculate additional yaw moment; carrying out offline calculation to obtain output torque MAP graphs of the vehicle under different accelerators and vehicle speeds, and according to the operation intention of a driver, carrying out interpolation on the accelerator pedal opening degree and the current vehicle speed to obtain expected longitudinal driving torque; and based on a double-track two-degree-of-freedom nonlinear vehicle model, performing motor torque distribution on the non-failure motor in combination with the additional yawing torque and the expected longitudinal driving torque.

    本发明公开了一种四轮分布式驱动客车电驱动系统失效控制方法,包括如下步骤:根据电驱动系统的失效模式选择车辆进入两驱模式或者停车模式;进入两驱模式时对未失效电机进行电机转矩分配:根据参考理想不足转向度US计算不同条件下的理想横摆角速度;结合积分估算法和质心侧偏角上限值经验公式计算理想质心侧偏角;采用模糊控制算法,把横摆角速度和质心侧偏角的误差作为输入变量,计算附加横摆力矩;离线计算得到车辆在不同油门和车速下的输出转矩MAP图,根据驾驶员的操作意图,通过对油门踏板开度和当前车速插值得到期望纵向驱动扭矩;基于双轨二自由度非线性车辆模型,结合附加横摆力矩和期望纵向驱动扭矩对未失效电机进行电机转矩分配。


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    Titel :

    Failure control method for electric drive system of four-wheel distributed drive passenger car


    Weitere Titelangaben:

    一种四轮分布式驱动客车电驱动系统失效控制方法


    Beteiligte:
    CHEN CHAO (Autor:in) / SU LIANG (Autor:in) / ZHU WUXI (Autor:in) / LIU ZHIWEI (Autor:in) / SONG GUANGJI (Autor:in) / HUANG LING (Autor:in)

    Erscheinungsdatum :

    2020-05-15


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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