分布式驱动电动汽车转矩优化分配的分析

Analysis of Torque Optimization Allocation of Distributed Drive Electric Vehicles

采用分布式驱动的新能源电动汽车,其驱动转矩的分配摆脱了传统驱动装置固有的束缚,从而获得了提升自身性能的极大潜力。文章以某运动型分布式驱动电动汽车为对象,通过优化分配各车轮驱动转矩来提高车辆的多项行驶性能。根据分布式驱动电动汽车的驱动特点,使用CarSim和Simulink联合建立了车辆动力学模型;以车辆能效优化及稳定性为控制目标分别设计了相应的转矩优化分配控制策略;为解决多目标同时控制时互相干涉的问题,在各控制策略之上设计了多目标联合控制策略;最后选择典型工况进行仿真实验,实验表明:基于各目标的单个转矩优化分配控制策略都达到了良好的控制效果;在多目标联合控制策略的调控下,各转矩优化分配控制策略可以协调工作,根据实际情况各自发挥能效。

Electric vehicles using distributed drive have great potential to improve their performance by breaking free from the inherent constraints of traditional driving devices in terms of torque distribution.This article takes a sports distributed drive electric vehicle as the object,and improves the vehicle's multiple driving performance by optimizing the allocation of driving torque for each wheel.According to the driving characteristics of the distributed drive electric vehicle,a vehicle dynamics model is established by using CarSim and Simulink;Corresponding torque optimization allocation control strategies are designed with the control objectives of vehicle energy efficiency optimization and stability;To solve the problem of mutual interference during multi-objective simultaneous control,a multi-objective joint control strategy is designed;Finally,typical operating conditions are selected for simulation experiments,which shows that the torque optimization allocation control strategy based on each objective achieved good control effects;Under the regulation of multi-objective joint control strategy,each torque optimization allocation control strategy can work in coordination and exert energy efficiency according to the actual situation.