为提高某FSAE赛车双横臂独立前悬架系统的操纵稳定性,利用ADAMS/Car模块建立该赛车前悬架运动学模型,并进行双轮同向激振仿真。在ADAMS/Insight中选取原悬架的前轮定位参数前轮外倾角、主销后倾角、主销内倾角、前束角为优化目标,以悬架的关键硬点坐标作为影响因素,通过响应面部分因素实验设计方法,选取灵敏度高的因素为约束条件进行多目标优化。优化后,前轮跳动时前轮定位参数的变化量显著减小,悬架的动态特性得到大幅改善,为此类FSAE赛车的悬架设计提供了理论参考。
A model of the front suspension system is built by using ADAMS/CAR and the parallel travel simulation of front suspension is performed to simulate and optimize the front double wishbone independent suspension of a Formula FSAE racing car. Then the front wheel alignment parameters including camber, caster, kingpin inclination, and toe angle are optimized by using ADAMS/Insight. The influence factors that are coordinates of the key points of suspension are selected with the high sensitivity factors as constraints to conduct the multi - objective optimization using the response surface factorial experiment design method. The result shows that the change of front wheel position parameters are significantly reduced during the front wheel travel after being optimized, thus a greatly improved kinematic performance. It provides theoretical reference to the suspension design of the FSAE race car.