中文摘要：

为准确分析车辆转动惯量估算误差对估算的汽车碰撞车速的影响,应用摄动理论建立了相应的分析方法和评价指标。应用分析方法对一起典型汽车碰撞实例的研究表明：对于质量相差较大的两车碰撞事故,高估重车转动惯量,而低估轻车转动惯量时,估算的轻车碰撞前车速的误差最大。

英文摘要：

For accurately analyzing the influence of the estimation error of vehicle moment of inertia on the estimate of pre-crash speed, an analysis method and evaluation indicators are established by applying perturbation theory. The results of applying the analysis method to a typical vehicle collision case show that for a crash accident of two vehicles with great difference in mass, an overestimation of heavier vehicle moment of inertia with an underes- timation of lighter vehicle moment of inertia may lead to the most significant error of pre-crash speed estimate for lighter vehicle.