Abstract: The suspension system is an important part of the vehicle, contributing significantly to the handling stability of a race car. In order to adapt to the varying track conditions of the formula student electric China (FSEC) to different track environments and reduce the mutual influence of the two side wheels during leaning and rolling, a fully decoupled suspension structure is designed. This suspension system includes guiding mechanisms, shock absorbers, lateral anti-roll bars, etc. Through the geometric parameter design and mechanical analysis of two shock absorbers and their connected guiding mechanisms, the separation of the car's roll stiffness and pitch stiffness are effectively achieved. The study conducts kinematic simulation and analysis of the decoupled suspension system using MATLAB. The results indicate that this structure exhibits minimal influence between the two shock absorbers during the vehicle's leaning and pitching, enabling independent control and adjustment of the car's roll stiffness and pitch stiffness. This design enhances the overall handling performance of the race car, making it more adaptable to race tracks, thereby assisting in improving the performance of the racing team.

Key words: Formula SAE; Suspension system; Decoupling suspension; Simulation analysis

摘要： 悬架系统是车辆的重要组成部分，对赛车操纵稳定性作出很大的贡献。为适应中国大 学生方程式汽车大赛（FSEC）对不同赛道环境的适应性，减少两侧车轮受侧倾和纵倾时的相 互影响，设计了一种完全解耦的悬架结构。该悬架系统包括导向机构、减震元件、横向防倾 杆等，通过两个避震器和与之相连的导向机构的几何参数设计与力学分析，有效实现了赛车 纵倾刚度和侧倾刚度分离。研究基于 MATLAB 对解耦悬架系统进行了运动学仿真模拟，分析 结果表明，该结构在车辆侧倾和俯仰时，两避震单元之间几乎没有影响，可有效实现车辆纵 倾刚度和侧倾刚度的独立控制和调整。该设计可有效提升赛车的整体操控性，使之更适应比 赛赛道，有助于提升赛车车队的成绩。

关键词: 方程式赛车；悬架系统；解耦悬架；仿真分析