基于侧偏特性的车辆转弯直径精确计算方法

摘要

车辆设计之初一般采用阿克曼原理进行车辆最小转弯直径的计算,由于其未考虑轮胎侧偏特性,导致计算结果误差较大.针对该问题,提出了一种考虑轮胎侧偏特性的车辆转弯直径计算方法,以某四轴越野车辆为研究对象,开展理论公式推导,根据轮胎试验数据拟合得到轮胎侧偏刚度,完成转弯直径的计算.与实车试验数据进行对比分析,结果表明:该方法计算误差小,能够准确计算车辆的转弯直径.%The Ackerman principle is used to design the minimum turning diameter in the first beginning of vehicle development.However, the cornering properties of tire are not considered that results in large range of computation error.A kind of computation method of turning diameter which considers the cornering properties is developed to study a four-axle vehicle.The cornering stiffness is fit by test data so as to compute the turning diameter.The comparison of simulation result and test data proves that the new computation method obtains mild error and high accuracy.