基于试验结果的碰撞前车速误差的校正

Correction of Pre-crash Speed Error Based on Test Results

为控制基于典型汽车碰撞模型计算的碰撞前车速误差,采用了反推算法。对2起车辆碰撞事例进行了碰撞前车速的模拟和试验。模拟结果表明,碰撞后车速误差是影响模型计算的碰撞前车速准确性的关键因素,而相对而言力学参数误差的影响则小得多。以碰撞试验结果为准确值对模拟计算的碰撞前车速误差进行了不同校正的研究。结果表明,对碰撞后车速误差和力学参数误差进行一次校正就能够消除碰撞前车速误差。研究结果证明该模型和算法具有极好的稳定性和收敛性。

To control pre-crash speed error calculated with typical vehicle collision model,reverse derivation algorithm is adopted,with test and simulation on pre-crash speed conducted. The results of simulation show that post-crash speed error is the key factor affecting pre-crash speed error,while the effects of mechanics parameters are relatively insignificant. With the crash test results taken as reference base,a study is performed on the different corrections on the errors of pre-crash speed simulated. The results show that pre-crash speed error can be eliminated by just one correction on post-impact speed error and mechanics parameter error,demonstrating the good stability and convergence property of the model built and the algorithm adopted.