基于自然驾驶试验的山区公路汽车行驶轨迹特性研究

发布时间：2018-05-14 14:53

本文选题：道路工程 + 山区公路　；参考：《中国公路学报》2016年07期

【摘要】：为掌握汽车行驶轨迹与公路几何线形之间的拓扑关系,在7条山区双车道公路上开展实车试验,采集了自然驾驶状态下的汽车运行参数并从中提取了行驶轨迹,得到了轨迹横向偏移率的连续变化曲线,分析了行驶轨迹的形态特征及其受公路几何参数的影响规律。结果表明:汽车进入左转弯后先是切向弯道内侧,之后驶向外侧,再驶回本车道,右转弯的轨迹变化规律基本类似,但切弯点和侵入对向车道的位置有所差别;对于中小转角的弯道,真实轨迹的切弯点要早于理想轨迹,并且真实轨迹要更靠向曲线外侧;弯道行驶时间越长、驾驶人越倾向于侵占对向车道,并且会出现二次切弯现象;切弯后由于惯性,汽车可能会过于靠拢弯道外侧,驾驶人需对轨迹进行矫正但矫正过度会导致车辆再次侵入对向车道;平曲线半径越小、汽车轨迹侵占对向车道的程度越严重,左转弯的转角中等大小时的轨迹偏移率最大,右转弯转角越大轨迹偏移率波动幅度越大;回头曲线会发生严重侵占对向车道的行为并且右转时的侵占程度更高。
[Abstract]:In order to understand the topological relationship between the vehicle track and the geometry of the highway, a real vehicle test was carried out on 7 mountain area two-lane highways. The running parameters of the vehicle in the state of natural driving were collected and the track of the vehicle was extracted from it. The continuous variation curve of the lateral migration rate of the track is obtained, and the shape characteristics of the track and its influence on the highway geometric parameters are analyzed. The results show that after entering the left turn, the vehicle first cuts to the inner side of the bend, then goes outside, then goes back to the driveway. The track of the right turn is basically the same, but the position of the tangent corner and the intrusive lane is different. For the corner of small and medium turning angle, the tangent point of the real track is earlier than the ideal track, and the true track should be closer to the outside of the curve, the longer the curve is, the more the driver tends to occupy the opposite lane, and the second cut will occur. Because of the inertia, the car may be too close to the outside of the bend, and the driver needs to correct the track, but too much correction will cause the vehicle to intrude into the opposite lane again; the smaller the radius of the flat curve, the more serious the encroachment of the track on the lane. When the turning angle of the left turn is medium, the migration rate of the trajectory is the largest, the greater the angle of the right turn, the greater the fluctuation of the trajectory migration rate, and the behavior of serious encroachment on the driveway will occur in the turning back curve, and the encroachment degree of the right turn will be higher.
【作者单位】：重庆交通大学山地城市交通系统与安全重庆市重点实验室;西南交通大学交通运输与物流学院;
【基金】：“十二五”国家科技支撑计划项目(2014BAG01B01) 交通运输部应用基础研究项目(2015 319 814 050) 重庆市科技计划项目(cstc2014jcyjA30024)
【分类号】：U491.25

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