基于整车操纵稳定性的横向稳定杆匹配设计

王浩

安徽江淮汽车集团股份有限公司技术中心，安徽 合肥  230601

摘要：为研究横向稳定杆对整车操纵稳定性的影响，以乘用车前、后横向稳定杆为研究对象，采用ADAMS/Car软件建立车辆动力学刚柔耦合仿真模型，分析不同直径的前、后横向稳定杆匹配方案对车辆不足转向梯度和车身侧倾梯度的影响，依据现有标杆车的不足转向梯度，车身侧倾梯度及前、后悬架的侧倾刚度比参考值，最终确定前、后稳定杆的直径分别为24、20 mm。以该匹配方案搭载到样车上进行稳态回转试验，结果表明：不足转向梯度随侧向加速度的增大而增大，样车具有适度的不足转向特性。仿真分析数据与试验结果基本吻合，验证了仿真模型的准确性和匹配方案的合理性。

关键词：横向稳定杆；匹配设计；不足转向梯度；车身侧倾梯度

Matching design of lateral stabilizer bars based on vehicle handling stability

WANG Hao

Technology Center, Anhui Jianghuai Automobile Co.,Ltd., Hefei 230601, China

Abstract:The influence of front and rear stabilizer bar on the handling stability of the passenger car is analyzed, the rigid-flexible coupling simulation model of vehicle dynamics is established by ADAMS/Car software. The matching scheme of the front and rear stabilizer bars with different diameters influences on understeer gradient and body roll gradient of the passenger car. Based on the reference value on understeer gradient, body rollgradient and roll stiffness ratio of the front and rear suspensions for the benchmark vehicle, the diameters of front and rear stabilizer bars are confirmed 24 mm and 20 mm respectively. Then matching scheme is mounted on a physical prototype vehicle to achieve a steady-state slewing test. The results show that the larger understeer gradient is, the higher lateral acceleration is. The prototype vehicle has moderate understeer characteristic. The data of simulation analysis is basically consistent with the test results, which verifies the accuracy of the simulation model and the rationality of the matching scheme.

Keywords:lateral stabilizer bar; matching design; understeer gradient; body roll gradient