非线性轮胎侧向力对汽车转向稳定性的影响

为分析轮胎侧向力对汽车转向稳定性的影响，建立了非线性轮胎侧向力模型并通过四自由度整车动力学模型计算了不同车速下汽车质心侧偏角、车身侧倾角和前轮转角响应。基于ADAMS的虚拟试验和实车试验结果表明：汽车高速转向行驶时，非线性轮胎侧向力模型能更准确地反映出汽车运动状态的响应，各状态响应的平均绝对误差能控制在相应状态幅值的10%以内。研究结果对汽车稳定性控制系统的设计具有理论指导意义。

Effects of Nonlinear Tire Lateral Force on Vehicle Steering Stability

To analyze the effects of tire lateral force, a nonlinear model of tire lateral force was established and a 4-DOFs vehicle dynamics model was adopted to calculate the responses of vehicle side slip angle and roll angle and front wheel steering angle with different velocities. The results of virtual experiments based on ADAMS and real vehicle experiments demonstrate that the nonlinear tire model can more accurately reflect the response of vehicle movement states under the conditions of high-speed steering, and the mean absolute errors of each state response can be guaranteed within 10% of the corresponding state amplitude. The conclusions may provide theoretic direction for the design of vehicle stability control system.