Improvement of Evaluation Indices for Rear-End Collision Risk
Improvement of Evaluation Indices for Rear-End Collision Risk
复制标题
追尾碰撞风险评估指标的改进
DOI：
10.1109/thms.2017.2751556
复制
发表时间：
2018
影响因子：
3.6
通讯作者：
Takada Shota
中科院分区：
文献类型：
--
作者：
Hiraoka Toshihiro;Takada Shota
有各种各样的指标来评估与前方障碍物的碰撞风险，这些指标用于确定前方障碍物碰撞警告系统（FCWS）和先进的紧急制动系统中的碰撞警告提供的时机。先前的研究提出了一种减速避碰（DCA）方法，它可以更准确地评估碰撞风险比其他传统的指标。然而，DCA的计算过程假设跟随车辆（FV）在驾驶员的恒定反应时间内执行匀速运动。这一假设导致在飞行器加速时低估碰撞风险，而在减速时高估碰撞风险。因此，本文展示了一个详细的计算过程的基础上，扩大的假设，FV保持均匀加速运动的反应时间内的改进DCA。此外，刺激反应实验进行了测量驾驶员的反应时，当他/她调整制动踏板压下。进行了数值模拟，其中DCA用于FCWS，以表明改进的DCA（具有驾驶员反应时间的新设置）与传统的DCA相比更恰当地描述了碰撞风险。
There are various kinds of indices to evaluate collision risk against forward obstacles, which are used to determine the timing of collision warning provision in forward obstacle collision warning systems (FCWSs) and advanced emergency braking systems. A previous study proposed a deceleration for collision avoidance (DCA) method, which can evaluate a collision risk more precisely than other conventional indices. However, the calculation process of DCA assumed that a following vehicle (FV) performs a uniform motion within a driver's constant reaction time. The assumption causes underestimation of collision risk when the FV accelerates and overestimation when it decelerates. Consequently, this paper shows a detailed calculation process of an improved DCA based on an expanded assumption that the FV maintains a uniformly accelerated motion within the reaction time. Moreover, stimulus-response experiments were conducted to measure the driver's reaction time when he/she adjusts the brake pedal depression. Numerical simulations, where DCA is used for the FCWS, were performed to show that the improved DCA (with a new setting for the driver reaction time) describes the collision risk more properly compared to the conventional DCA.