基于FVD模型的改进模型和试验比较

发布时间：2018-05-04 18:28

本文选题：交通工程 + 城市交叉路口　；参考：《公路交通科技》2014年02期

【摘要】：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。
[Abstract]:In order to make the car-following model reflect the actual behavior of the vehicle more accurately, based on the verification of the full-speed difference model, the effects of safety spacing and velocity difference on the acceleration of the rear vehicle are reconsidered, and an improved model is proposed. The improved model regards the safe distance as a time-varying function and the effect of velocity difference on the acceleration of a car-following car as a nonlinear correlation function. Taking the video of traffic flow on the road at the intersection of the city, using MATLAB to make perspective transformation to each frame image, and then manually recording the coordinates of the vehicle in each frame image after the transformation. The vehicle displacement function is fitted from the vehicle coordinate data, the velocity function is derived and the velocity data are obtained by discretization. The velocity data obtained by the iterative algorithm are substituted into the difference equations of the full speed difference model and the improved model respectively, and the velocity of the model is calculated, and the results of the two models are compared with each other. The results show that the improved model can more accurately reflect the car-following behavior of vehicles in urban intersections.
【作者单位】：西北工业大学自动化学院;
【基金】：国家自然科学基金项目(61134004)
【分类号】：U491

【参考文献】