汽车碰撞模型中力学参数误差对碰撞前车速的影响

Influence of Mechanical Parameter Errors on Pre-impact Speed of Vehicles in Vehicle Collision Models

为了准确度量汽车碰撞模型中力学参数误差对碰撞前车速的影响,应用矩阵理论建立了影响程度分析方法.针对常见的误差形式,通过实例分析了以质心为坐标原点的碰撞模型和以碰撞中心为坐标原点的碰撞模型中力学参数误差对碰撞前车速的影响.结果表明,以碰撞前车速相对误差≤3%作为约束条件,以质心为坐标原点的碰撞模型和以碰撞中心为坐标原点的碰撞模型中,力学参数误差范围的最大值为±9.7%和±8.7%.

In order to measure accurately the influence of mechanical parameter errors on the pre-impact speed of vehicles in vehicle collision models,an influence analysis method was built by matrix theory.According to common error forms,the influence of mechanical parameter errors in one model with a centroid origin and another model with a collision center origin on the pre-impact speed of a vehicle was analyzed through a vehicle collision case.The result shows that under the constraint that the relative error in pre-impact speed is not more than 3%,the maximum margin of mechanical parameter error is ±9.7% in the model with a centroid origin,and ±8.7% in the model with a collision center origin.