基于多目标优化的菱形车双横臂悬架运动学分析

Kinematics Analysis of Double Wishbone Suspension Based on Multi-objective Optimization

运用多体动力学有限转动张量和空间解析几何方法,建立了双横臂悬架关键点的约束方程,导出了轮胎滑移和倾角随车轮跳动的变化规律。结合多目标遗传算法,以悬架横臂长度和初始位置为参数,对双横臂悬架跳动过程中的轮胎滑移和倾角的变化进行了优化。求解出了工程许可范围内的双横臂悬架轮胎滑移和外倾角变化关系及其悬架导向杆系参数。

Based on the finite rotational tensor method and the spatial analytic geometry method, the constraint equations of key points were formulated, and the law that parameters such as slip of tire and camber of tire vary with the wheel moving up and down was deduced. The length and initial location of the wishbone were considered as design variables. Both the slip of tire and camber of tire varied with the wheel moving up and down were optimized through the multi-objective genetic algorithm. The slip of tire, camber of tire and the corresponding parameters of wishbone which are permitted in engineering are obtained.