双横臂独立悬架运动学分析与优化设计

Optimization Design of a Double-wishbone Independent Suspension Based on Kinematics Analysis

首先,针对双横臂悬架特性,采用空间机构运动学理论,对悬架导向机构与转向梯形机构进行运动学分析,然后,利用Matlab编程,实现了从初始坐标输入——悬架系统运动学计算——轮胎定位参数判断——悬架系统的支点位置优化设计的功能.最后,针对某车型悬架系统进行设计计算,优化了悬架支点位置,优化后的轮胎定位参数均达到良好的变化趋势.

Firstly, kinematic analysis is deducted from the suspension guiding mechanism and the steering trapezoid mechanism on the basis of spatial mechanism kinematics. Secondly, a procedure is programmed by Matlab to implement the input of the initial coordinates, the kinematics calculation of the suspension system, the determination of the wheel alignment parameters and the optimization design of the suspension supporting point location. In this paper, the procedure was used to do the optimization design for the suspension system of a real vehicle. Finally, the variation trend of the wheel alignment parameters achieved a satisfactory target according to the optimization of the suspension supporting point location.