基于CarSim交通事故中汽车制动初速度的计算*

基于汽车制动过程分析,结合实际交通事故中制动距离的影响因素,针对交通事故中汽车制动初速度计算方法进行了研究,通过分析传统计算的不足。结合理论知识,采用车辆动力学仿真软件CarSim中的实车仿真模块进行仿真分析,将最大制动加速度持续时间与制动初速度采用Matlab拟合,得到了一种以最大制动加速度持续时间为自变量的计算公式。最后进行实车试验采集制动数据,试验结果表明,该公式在交通事故中计算出的制动初速度,与实际情况基本吻合。

The Calculation of Vehicle Braking Original Speed in Traffic Accident Based on CARSIM

During the automobile braking,in view of the effect factors of braking distance of traffic accident, some study which is contacted with automobile braking original speed in the traffic accident have been done. By analyzing the deficiency of the traditional calculation method and theoretical knowledge, there is a simulation being made by vehicle dynamics simulation software CARSIM . And by using Matlab, which can be used to do data-fitting, a maximum braking acceleration duration as the independent variable of the formula is came up with. Results of trial indicated that the braking original speed which is calculated by the formula in the traffic accident agrees well with that of testing.