基于逆算法与试算法的车辆碰撞车速对比研究

Comparative study on vehicle-to-vehicle collision speed based on inverse algorithm and trial algorithm

为提高道路交通事故车速计算仿真再现的准确性与实用性,基于车对车碰撞事故案例,采用道路交通事故分析与再现系统(Crash View)逆算法与Pc-Crash试算法,对比分析其计算机制、模型算法、输入参数、输出误差等核心解算部分,优化车速计算算法,完成事故实际场景车速计算;Crash View系统计算相对误差约为4%,输入车辆位置、车身结构、车体姿态参数量较少且易于获取;Pc-Crash系统计算相对误差约为9%,计算时需要人工手动反复试算,调整车速、位置、姿态等预估参数。研究结果表明:采用Crash View逆算法的仿真再现系统更适用于实际交通事故车速计算;PcCrash试算法受经验公式影响较大,适用范围较小。

In order to improve accuracy and practicality of road traffic accident speed calculation simulation,with actual vehicle-to-vehicle collision accidents as subject,road traffic accident analysis,reproduction system(Crash View)inverse algorithm and Pc-Crash test algorithm were utilized to compare and analyze its and analyze its calculation system,model algorithm,input parameters,output error and other core calculation parts.Then and other core calculation parts.Then,speed calculation method was optimized and actual accident scene speed was obtained.Relative error of Crash View system was about 4%,and input parameters of vehicle position,body structure,body posture were comparatively less and easy to obtain.That of Pc-Crash system was around 9%,and manually repeated trial adjustment of speed,position,attitude and other parameters was required.The results show that the simulation reproduction system with inverse algorithm on Crash View is more suitable for the calculation of actual traffic accident speed while trial algorithm on Pc-Crash is greatly affected by empirical formula with a small scope of application.