路面附着对SUV行驶稳定性的影响

Influence of Road Adhesive Coefficient on SUV Driving Stability

为确定路面附着系数对SUV行驶稳定性的影响,论述了路面附着系数对轮胎力学特性的影响,分析了汽车转向侧滑和侧翻的力学特性和失稳机理,在构建ADAMS车辆动力学模型基础上,利用实车试验对模型进行验证,并在此基础上仿真分析了SUV在不同附着系数道路和极限转向行驶条件下汽车横摆和侧倾运动特性。结果表明:附着系数对轮胎力学影响较大,汽车在低/高附着系数路面行驶时,在纵向/侧向速度、横摆角速度及侧倾角方面表现出不同的极限运动状态。相关成果可为汽车对道路适应性优化设计和稳定性控制提供参考。

This paper introduces the effect of road adhesive c, oefficient on the tyre mechanical performance to determine the influence of road adhesive coefficient nn SUV driving stability. The force characteristics and instable mechanisms of vehicle side slip and side overturning are analyzed in the paper. Though establishing SUV dynamic model by ADAMS and verifying the model by actual vehicle tests, the yawing motion and the roll behavior of SUV in the conditions of different mad adhesion coefficients and limit steering are analyzed. Results show that there are close relation between the road adhesion coefficient and tyre force characteristics, vehicle presents the different limit dynamic performance in the aspect of longitudinal/lateral velocity, yawing velocity and lateral inclination angle in the condition of high/low road adhesive coefficient. Related research will provide valuable reference for the optimization design of road adaptability and stability control