基于横摆力矩控制的电动轮汽车转弯节能控制

Yaw-moment control of motorized vehicle for energy conservation during cornering

首先,研究了车辆转弯时转弯阻力产生的机理,提出了影响转弯阻力的因素。然后,提出了通过改变纵向力分配减小转弯阻力的方法。最后,基于车身稳定性的约束,通过理论分析和计算机仿真,对比了纵向力分配前、后车辆转弯过程中的能耗,并采用遗传算法对后轴轮间的转矩分配系数进行了优化。研究表明,通过对电动轮汽车的纵向力分配,可以降低电动汽车在转弯过程中的能耗,提高转弯机动性。

In this paper, based on the study of vehicle dynamics during turning, the reason that causing extra driving resistance was found. It was proposed that a counter yaw moment can mitigate this extra driving resistance during turning. For a vehicle with independent electric drive for left and right wheels on rear axle, driving power can be reduced by means of proper torque distribution between the left and right wheels. By theoretical analysis and simulation, the optimal torque distribution coefficient of the real axle was obtained by genetic algorithm, by which the vehicle consumes the lowest power during turning without causing instability. This research shows that the vehicle energy consumption can be reduced, and turning maneuverability can be improved by the yaw moment control.