摘要
为辅助汽车驾驶员安全驾驶,开发了一种汽车主动避撞系统。该系统以"碰撞时间倒数"TTC-1作为评价指标,采用了基于危险系数ε进行分级报警与主动制动的安全距离模型,其关键参数按照驾驶员特性进行标定。基于自适应巡航系统(ACC)目标检测算法,设计了适用于避撞系统的毫米波雷达算法。基于捷达轿车,开发了用于避撞系统的软硬件平台,并在良好路面下分别进行了主动避撞试验和人为切换试验。实车试验表明:本系统的分级报警和主动制动功能,符合期望的TTC-1指标,提高了汽车的主动安全性,体现了驾驶员控制的优先性和协调性。
Safe-driving was assisted with key parameters calibrated according to the driver’s characteristics using a developed system of vehicle collision warning and collision avoidance （CW/CA）. The system defines the inverse of time-to-collision （TTC-1） as the evaluation index with the grading warning and braking safe distance model adopted based on hazardous level ε. A millimeter waveradar obstacle detection method was designed with adaptive cruise control （ACC）. The system configuration and control logic were designed based on a Jetta car with the collision avoidance test and the manual / automatic interaction test implemented on dry roads. The real car experiments show that the CW/CA system in accordance with desired TTC-1 index improves vehicle active safety, and embodies the driver’s priority and cooperation.
出处
《汽车安全与节能学报》
CAS
2012年第1期26-33,共8页
Journal of Automotive Safety and Energy
基金
国家自然科学基金(51005019)
国家部委预研项目基金(40401040302)
关键词
主动安全
驾驶辅助
安全距离模型
目标检测
防撞报警
主动避撞
active safety
driving assistance
safe distance model
obstacle detection
collision warning
collision avoidance
