The invention discloses an electro-hydraulic composite steering control method and system for an electric-wheel automobile under an extreme working condition. The method comprises the steps that S1, whether the automobile is in an unstable state or not is judged; s2, selecting an automobile driving control mode; s3, electro-hydraulic composite coordinated distribution is carried out on four wheels of the automobile; s4, the optimal motor driving force and hydraulic braking force are obtained; and S5, selecting a corresponding electro-hydraulic composite coordination control mode according to the current steering working condition of the automobile and the optimal motor driving force and hydraulic braking force obtained in the step S4. Coordinated control over hydraulic braking and motor driving is provided under the limiting working condition, different wheels are controlled and compensated mutually, the stability of a vehicle body under the limiting working condition is controlled accurately and timely, combination of different control modes is achieved, and stability control over electro-hydraulic coupling optimization is achieved to the maximum extent; the working condition of an automobile is judged according to the yaw velocity, the steering wheel rotation angle and the steering wheel angular velocity, and coupling optimization of the electro-hydraulic composite ESP is achieved by regulating and controlling hydraulic braking and motor driving.

    本发明公开一种极限工况下电动轮汽车电液复合转向控制方法及系统,包括:S1:判断汽车是否处于失稳状态;S2:选择汽车驱动控制方式;S3:对汽车四轮进行电液复合协调分配;S4:获取最优电机驱动力和液压制动力;S5:根据汽车当前所处的转向工况,以及S4中获取最优电机驱动力和液压制动力,选择对应电液复合协调控制模式。通过在极限工况下提出液压制动和电机驱动的协调控制,分别控制不同的车轮,相互补偿,精准及时的对处于极限工况下车身稳定进行控制,实现不同控制模式的组合,最大化实现电液耦合优化的稳定性控制;根据横摆角速度、方向盘转角和方向盘角速度来判断出汽车所处工况,通过调控液压制动和电机驱动来实现电液复合ESP的耦合优化。


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    Title :

    Electro-hydraulic composite steering control method and system for electric-wheel automobile under extreme working condition


    Additional title:

    一种极限工况下电动轮汽车电液复合转向控制方法及系统


    Contributors:
    ZHANG HOUZHONG (author) / SI WEIJIAN (author) / XU XING (author) / SUN XIAOQIANG (author) / WANG FENG (author)

    Publication date :

    2024-11-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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