【摘要】 追尾碰撞事故导致挥鞭伤,造成了很大的社会经济支出。根据生物力学的研究成果,在追尾碰撞发生时,减小头枕与头部的水平距离可以降低挥鞭伤的程度。为了弥补传统纯机械主动头枕响应滞后的不足,采用机电结合的方法,根据自主巡航系统提供的信息,提前判断并启动头枕,从而保护乘员。分析了追尾碰撞中颈部的保护策略,研究了追尾防撞和预警算法,根据基于安全间距的追尾防撞模型和安全度评定算法编写了可视化的判断算例。算例具有如下功能:根据输入的跟车信息判断安全度;追尾碰撞NIC值的估算;碰撞后两车的运动追踪。更多还原

【Abstract】 Whiplash caused by rear end collsions may result in much social economic cost.According to the result of biomechanical research,reducing the backsets between head and headrest may lead to a reduced risk of cervical spine injury during a rear end collision accident.In order to cover the shortage of traditional mechanical active headrest,the response time of which is long,mechanical and electronic methods are both used in this project and the active headrest can be actuated ahead of an accident to protect the occupants,according to the judging algorithm based on the information from ACC(Active Cruise Control)system.In this research,methods of the protection for an occupant’s neck during a rear end collision are analyzed,as well as the algorithm of rear end collision avoidance and warning.A judging program with graphical user interfaces is created using the prediction model of rear end collisions,based on safe following distance and the algorithm of safety degree criterion.The functions of this program are as follows:Judge the safe degree according to the input information of car following behaviour;Estimate the NIC value in a rear end collision;Simulate the kinematic parameters of these two cars after collision.更多还原