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针对四轮轮毂电机电动汽车转向时四轮差速问题,进行了电子差速控制研究。设计了电子差速控制策略,建立差速运动参考模型,根据四轮轮毂电机电动汽车四轮驱动力矩独立可控的优势,通过驱动力矩分配器对四轮驱动力矩进行合理分配,实现了实际轮速跟踪参考轮速,并在Matlab/Simulink里搭建了四轮轮毂电机电动汽车电子差速系统模型,通过CarSim与Matlab/Simulink联合仿真进行了验证。结果表明:电子差速差速控制策略能够有效实现转向时四轮差速控制,提高电动汽车的操纵稳定性。
Aiming at the four-wheel differential in four-wheel hub electric motor vehicle steering, the electronic differential control was studied. The electronic differential control strategy is designed and the differential motion reference model is established. According to the advantages of four-wheel drive motor with independent control of four-wheel drive torque, the four-wheel drive torque is rationally distributed by the drive torque distributor, Speed tracking reference wheel speed, and set up a four wheel hub electric vehicle electronic differential system model in Matlab / Simulink, verified by CarSim and Matlab / Simulink co-simulation. The results show that the electronic differential differential control strategy can effectively realize the four-wheel differential control during steering and improve the steering stability of the electric vehicle.