The invention provides a torque distribution method and system based on a distributed dual-motor driven vehicle, and belongs to the technical field of pure electric vehicles. The method comprises the steps of obtaining a discrete value of a torque distribution coefficient in each step in a value domain, establishing a longitudinal dynamical model of a vehicle based on a distributed dual-motor driving mode, defining a target function according to the longitudinal dynamical model, and optimizing a rolling prediction optimization problem with optimal energy consumption in combination with a preset constraint condition and the target function. The rolling prediction optimization problem is solved on the basis of the Pontryagin minimum principle and a bisection iteration method to obtain the optimal control quantity, the energy consumption value under each discrete value is calculated on the basis of the optimal control quantity, and the target discrete value corresponding to the minimum energy consumption value is selected as the optimal torque distribution coefficient. By means of the distributed dual-motor driving method and device, the defects of an existing distributed dual-motor driving scheme and an existing torque distribution method can be comprehensively overcome, the torque distribution coefficient meeting the optimal energy consumption condition is found, and the optimal energy-saving and consumption-reducing effect is achieved.

    本发明提供了一种基于分布式双电机驱动车辆的扭矩分配方法及系统,属于纯电汽车技术领域。所述方法包括获取扭矩分配系数在值域内每一步的离散值,基于分布式双电机驱动模式建立车辆的纵向动力学模型,根据纵向动力学模型定义目标函数,结合预设约束条件及目标函数优化能耗最优的滚动预测优化问题,基于庞特里亚金极小值原理及二分迭代法求解滚动预测优化问题得到最优控制量,基于最优控制量分别计算出每一离散值下的能耗值,选取最小能耗值所对应的目标离散值,即为最优的扭矩分配系数。通过本申请,可综合解决现有分布式双电机的驱动方案及扭矩分配方法存在的各自缺点,找到满足能耗最优条件的扭矩分配系数,以实现最优的节能降耗效果。


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    Titel :

    Torque distribution method and system based on distributed dual-motor driven vehicle


    Weitere Titelangaben:

    基于分布式双电机驱动车辆的扭矩分配方法及系统


    Beteiligte:
    HONG JINLONG (Autor:in) / GAO BINGZHAO (Autor:in) / LUO XI (Autor:in) / LIU DENGCHENG (Autor:in) / CHENG YIFAN (Autor:in)

    Erscheinungsdatum :

    2023-04-28


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

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