Assessment and modeling of active safety system

碰撞缓减制动器是汽车碰撞事故的主动安全系统之一。本研究的目的是通过数值模拟来阐明CMB的影响。将传感器模型和CMB模型结合到车辆动态运动分析中，模拟了直线道路和弯道上的追尾事故。仿真结果表明，道路摩擦系数对CMB的减振效果影响较大。在弯道的情况下，由于检测延迟，CMB的检测效果比直道的效果要差。然而，研究发现，通过根据转向角修改雷达方向可以避免这一延迟。

Collision Mitigation Brake (CMB) is one of active safety system for automobile collision accidents. The purpose of this research is to clarify the effect of CMB by numerical simulation. Rear-end collisions on straight road and curved road were simulated by incorporating the sensing and CMB model into dynamic vehicle motion analysis. It was shown from the simulation results that the effect of CMB was largely influenced by the road friction coefficient. And in the case of curved road, the effect of CMB was decreased compared with the case of straight road because of detection delay. However, it was found that this delay was avoided by revising the rader direction according with the steering angle.