中文摘要：

汽车碰撞危险辨识与预警是智能防撞系统的关键技术之一，为了解决现有的防撞系统在复杂交通环境下虚警率较高、灵活性差的问题，本文对“人-车-路”多因素影响下的汽车碰撞危险辨识方法进行了研究．综合考虑驾驶员、车间距、路面等因素对行车安全性的影响，并基于车路协同平台获取相关信息，应用态势评估理论建立汽车碰撞危险评估模型．在该模型的基础上，结合变精度粗糙集理论形成汽车碰撞危险态势评估规则．应用属性加权相似度方法比较当前行车状态与决策信息表中所有行车状态的相似程度，得到碰撞危险态势的评估结果．模拟驾驶实验结果表明，该方法能融合行车安全相关的多种因素来检测碰撞风险，为汽车防撞系统提供准确的决策．

英文摘要：

Vehicle collision risk identification and warning is one of the key technologies of intelligent collision avoidance system. In view of the problems that the existing vehicle collision avoidance systems keep high false alarm rate and low flexibility in complicated road traffic environment, this paper presents a method for vehicle collision risk identification with the impact from ＂driver-vehicle-road＂ multi-factors. A model is established for identification of vehicle collision risk considering the fusion of related factors such as driver state, distance between vehicles, road surface, etc. The relevant information is obtained from cooperative vehicle-infrastructure system （CVIS）. Then, the risk situation assessment algorithm is formulated based ontheory of variable precision rough set （VPRS）. Finally, similarity degrees between the current driving status and driving status in decision-making table are compared based on attribute weighted similarity, which could get the situation assessment results. The simulated driving results show that this method can be used for fusion of safety related factors and detection of collision risk.