转动惯量误差对汽车碰撞模型计算结果的影响

Influence of Rotational Inertia Errors on Simulation Results of Vehicle Collision Model

为了有效控制车辆转动惯量误差对汽车碰撞模型计算结果的影响,应用摄动理论分析了车辆转动惯量误差对模型计算结果的影响规律.应用碰撞前车速曲线平均斜率、车速方向角曲线平均斜率和角速度曲线平均斜率,研究了车辆转动惯量误差对模型计算结果的影响程度.根据影响程度能够确定满足模型计算结果精度要求的车辆转动惯量取值范围.研究结果表明:当限制车辆转动惯量误差在±7.94%范围内时,模型计算结果相对误差≤5%.

To control effectively the influence of rotational inertia errors in the vehicle collision model on the simulation results, the influence rules were analyzed by perturbation theory. The influence degrees were investigated using the average slope of the pre-impact vehicle speed curve, the pre-impact vehicle speed angle curve, and the pre-impaet angular velocity curve. According to the influence degrees, rotational inertia ranges that meet the demand of the simulation result accuracy could be determined. The result shows that when the rotational inertia error is controlled within ±7.94% , the relative error of the simulation result is less or equal to 5%.