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基于FVD模型的改进模型和试验比较

, PP. 109-113

Keywords: 交通工程,城市交叉路口,视频数据分析,FVD改进模型,跟驰模型

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Abstract:

为了使跟驰模型能更准确地反映车辆的实际行为,在验证全速差模型的基础上,对安全间距和速度差对后车的加速度影响做了重新考虑,提出了改进模型。改进模型将安全间距看作时变函数,将速度差对跟驰车加速度的影响看作非线性相关的函数。对城市交叉路口道路拍摄交通流视频,利用MATLAB对每帧图像做透视变换,然后手动记录车辆在变换后的每帧图像中的坐标。将所得的车辆坐标数据拟合出车辆位移函数,求导算出其速度函数,再进行离散化,得到速度数据。使用迭代算法将所得的速度数据分别代入全速差模型和改进模型的差分方程中,算出模型速度,并将2模型运算结果作图进行对比。结果表明改进模型在城市交叉路口环境中更能准确地反映车辆的跟驰行为。

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