车辆质心纵向位置变化对车辆侧向响应的影响

建立基于非线性轮胎侧偏特性的四轮车辆数值模型,考虑轮胎垂直载荷的侧向转移,用该模型计算车辆转向角阶跃输入下的侧向速度和横摆角度速度响应,计算结果表明,侧向速度稳态值随车辆质心纵向位置近似成指数关系变化,随着车辆质心的前移,侧向速度的响应越快,但超调量也随之增加。

Analysis on vehicle lateral response of the variation of longitudinal C. G. position

Four-wheel vehicle model was made based on the nonlinear lateral force that considered the effects of lateral weight transfer on the normal load of the tires.A step-steer and total vehicle velocity of constant magnitude were used as inputs for the model.The lateral velocity and yaw angular velocity response characteristics were analyzed.The variation of the response characteristics due to C.G.position was discovered to be exponential.With the C.G.position prepositive,the lateral velocity response turned quickly but the overshoot added.