轮毂电机电动汽车电子差速控制影响因素分析

Analysis on the Influence Factors of Electronic Differential Control of Four Wheel Inwheel Motor Drive Electric Vehicle

为完善四轮轮毂电机电动汽车转向时驱动轮的差速控制技术,对其影响因素进行了研究。建立了整车电子差速控制转向运动参考模型,设计了电子差速控制算法,通过对选取的八自由度整车动力学模型进行线性简化,理论分析出影响电子差速控制的因素是汽车质量、前轴距质心距离和质心高度。通过Car Sim与Simulink联合仿真,选取电动汽车中等车速下的蛇形试验工况对理论分析结果进行了仿真验证,仿真结果与理论分析结果一致,但3种因素的综合影响非常小,有效说明设计的电子差速控制算法具有较强的鲁棒性。

The influencing factors are analyzed in order to improve differential control technology for four wheel motor drive electric vehicle. The CarSim and Simulink co-simulation model is established, and the electronic differential control algorithm is designed, the factors that influence electronic differential control include vehicle quality, front axle to the mass center distance and the height of the mass center through selecting the eight degrees of freedom vehicle dynamic model to do linear simplification. Through CarSim associated with Simulink simulation, the slalom test of electric vehicle in the medium speed range is verified through theoretical analysis, the simulation results are consistent with the theoretical analysis, but the comprehensive influence of 3 factors is small, it showed that the algorithm of electronic differential control presented a strong robustness.