Effect of the geometrical parameters on the vehicle's moving stability

Xiaobin Ye, V. Nguyen, M. Ke
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Abstract

. To enhance the moving stability and safety of vehicles, kinematics and dynamics model of the vehicle consisting of a guided front wheel and a free rear wheel is established based on the model of a four-wheeled vehicle when the vehicle moves on the curve-road. The effect of the geometrical parameters and dynamics parameters including the factor of the moving stability, vehicle moving speed, lateral stiffness parameters of the front and rear wheels, vehicle mass, vehicle length on the vehicle moving stability and safety is then simulated and analyzed, respectively. The research results indicate that the operating parameters of the vehicle greatly affect the vehicle moving stability. The lateral stiffness parameters of the front and rear wheels should be increased while the vehicle mass needs to be reduced in the operating condition of the vehicle to enhance the vehicle moving stability. Besides, the vehicle length 𝐿 should be reduced and the longitudinal distance of a needs to be distributed by 0.95× 𝑎 to further improve the vehicle moving stability.
几何参数对车辆运动稳定性的影响
。为了提高车辆的行驶稳定性和安全性,在四轮车辆模型的基础上,建立了由导向前轮和自由后轮组成的车辆在曲线道路上行驶时的运动学和动力学模型。分别模拟分析了运动稳定性因子、车辆运动速度、前后轮横向刚度参数、车辆质量、车辆长度等几何参数和动力学参数对车辆运动稳定性和安全性的影响。研究结果表明,车辆的运行参数对车辆的运动稳定性影响很大。在车辆运行状态下,应增加前后轮的横向刚度参数,同时减小车辆质量,以提高车辆的运动稳定性。此外,还应减小车辆长度𝐿,将a的纵向距离分配为0.95×𝑎,以进一步提高车辆的运动稳定性。
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