轮毂电驱动汽车乘坐舒适性研究

针对轮毂电驱动汽车乘坐舒适性变差及驱动电机的质量问题, 建立了车身与车轮两自由度四分之一车辆 振动系统模型, 通过计算不变点说明乘坐舒适性变差的原因, 并给出驱动电机的质量要求以提高乘坐舒适性, 并用 Simulink 对结果仿真和验证。 结果表明, 频率不变点不会因为弹簧刚度和阻尼系数的改变而改变, 而且频 率不变点所对应的车身加速度对路面输入速度的幅频特性值很接近极大值, 对乘坐舒适性影响很大, 导致轮毂 电驱动汽车乘坐舒适性变差, 并给出驱动电机最适合整车舒适性的质量要求。

Research of Ride Comfort of Wheel Hub Electric Vehicle

In order to study the cause of the deterioration of wheel hub electric car ride comfort and the quality requirements of the driven motor, set up a quarter wheel body with two degrees of freedom vehicle vibration system model,calculate the invariant point to indicate the reasons for the deterioration of ride comfort,also give the weight requirements of the driving motor to improve ride comfort,and use Simulink to simulate and verify the result.The results show that the frequency invariant point does not change with the change of spring stiffness and damping coefficient,and the amplitude frequency characteristic value of the input speed of road surface for the vehicle body acceleration corresponding to frequency invariant points is close to the maximum value, it has a great influence on ride comfort, causing wheel hub electric vehicle ride comfort deterioration, and we can give the quality requirements of the drive motor.