基于地面坐标系的汽车转向特性分析

Analysis of the Vehicle Steering Characteristics Based on the Earth Coordinate System

以建立在地面静坐标系下的汽车模型为基础,以绝对运动的侧向位移y和横摆角度θ为分析变量来标征汽车侧向和横摆运动,分析了汽车转向的稳态和瞬态两种情况,给出了稳态线性情况下的不足转向梯度η,最后通过拉氏变换给出了y和θ的解析式,并结合实例进行了计算分析。

Based on the static earth coordinate system,the lateral displacementy and the yaw angle are used as two variables to represent the vehicle's lateral motion and yaw moment.This paper analyzes the case of the stable steering and the transient steering and presents the understeering gradient under the steady linear case. Finally, the calculating formulation of the lateral displacement and yaw angle are also presented by means of Laplace transform,and the calculation and analysis of the vehicle are also provided in this paper.