To improve the minimum time handling and stability of a vehicle, multi-objective optimization of vehicle suspension was studied. Taking a vehicle with double wishbone front suspension and multi-link rear suspension as an example, the vehicle model was built based on ADAMS/Car. Through double-lane change simulation test, it was found that the vehicle understeer was too large. The main factors influencing understeer in the suspension were analyzed. It was determined that the height of the suspension roll center, the equivalent cornering stiffness, and the roll steering coefficient were taken as the optimization objective. Combined with insight sensitivity analysis on hard point coordinates and bushing stiffness, the optimization variables were determined. According to the evaluation index of minimum time handling and stability, the performance before and after the optimization was analyzed and contrasted by ADAMS. The result showed that the evaluation index of driver burden, the evaluation index of rollover hazard, the evaluation index of vehicle side-slip hazard, the evaluation index of dynamic, the evaluation index of tire road holding capacity, and the evaluation index of responsiveness were all decreased, which indicated that the minimum time handling and stability of a vehicle was improved after optimization.

中文翻译：

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基于最小操纵时间和稳定性的汽车悬架多目标优化研究

为提高车辆的最小操纵时间和稳定性，研究了车辆悬架的多目标优化。以双横臂前悬架多连杆后悬架车辆为例，基于ADAMS/Car建立车辆模型。通过双车道变换模拟试验，发现车辆转向不足过大。分析了影响悬架转向不足的主要因素。确定以悬架侧倾中心高度、等效侧偏刚度和侧倾转向系数为优化目标。结合对硬点坐标和衬套刚度的洞察灵敏度分析，确定了优化变量。根据最小时间处理和稳定性的评价指标，通过ADAMS对优化前后的性能进行分析对比。结果表明，驾驶员负担评价指标、侧翻危险评价指标、车辆侧滑危险评价指标、动态评价指标、轮胎路面承载力评价指标、响应性评价指标为均下降，说明优化后车辆的最短时间操控性和稳定性得到了提高。