纯电动汽车中位转向品质提升

Improvement of The Electric Vehicle's Median Steering Quality

文章以某纯电动汽车专用底盘开发为例,讲解了中位转向品质提升的过程。从骡子车试驾过程中发现中位转向性能的诸多问题,到找到轮胎、悬架和转向中的关键设计因素,并通过数字化双胞胎-物理样车和数字样车相辅相成并行开发的方法,将优化方案进行计算并验证。通过进行系统、科学的设计优化和鲁棒性控制,解决了多物理场(空间维度、零件刚度特性、阻尼特性、摩擦、系统动力学等)多变量的复杂设计问题,最终中位转向性能品质达到前期设定的目标,实现了竞争车型性能水平。

In this paper, the development of a special chassis of pure electric vehicles is taken as an example to explain the process of improving the quality of the on center steering performance. From finding the problems of center steering performance in mule car test drive to system analysis, the key design factors in tire, suspension and steering are found. The optimization scheme is calculated and verified by the method of parallel development of digital twin physical sample vehicle and digital sample vehicle. Through systematic and scientific design optimization and robust control, the complex design problems of multi physical fields (spatial dimension, part stiffness characteristics, damping characteristics, friction, system dynamics, etc.) and multi variables are solved. Eventually, the mid-level steering performance quality reaches the goal set and the performance level of competing models.