分布式电动汽车附加横摆力矩研究

Research on additional yaw torque of distributed electric vehicles

为提高分布式电动汽车在高速转向工况下的稳定性,针对分布式双电机后驱系统进行转矩分配研究。根据横摆力矩得到汽车转向时左右驱动轮驱动力矩,再对横摆角速度、质心侧偏角与附加横摆力矩关系加以分析,得到横摆角速度误差值及质心侧偏角误差值,并以两个误差值为双输入,附加横摆力矩为单输出,进行模糊控制,并对附加转矩施加至左右驱动轮的方式进行判断。利用Carsim软件与Matlab/Simulink软件联合仿真对结果进行验证,结果表明:经过模糊控制及输入判断的附加横摆力矩施加到驱动轮后,使得分布式电动汽车在高速转向工况下拥有良好的稳定性。

In order to improve the stability of distributed electric vehicles under high-speed steering conditions,a torque distribution study is performed for the distributed dual-motor rear-drive system.According to the yaw moment,the driving torque of the left and right drive wheels when the vehicle turns is obtained,and then the relationship between the yaw angular velocity,the centroid side deviation angle and the additional yaw moment is analyzed.Obtain the yaw angular velocity error value and the centroid side deflection angle error value,and take the two error values as dual inputs,and the additional yaw moment is a single output.Fuzzy control is performed and judge how the additional yaw moment is applied to the left and right drive wheels.Carsim software and Matlab/Simulink software were used to simulate the results to verify the results.The results show that after the additional yaw moment of fuzzy control and input judgment is applied to the driving wheels,the distributed electric vehicle has good stability under high-speed steering conditions.