变速度上限和虚坡长度的超车跟车模型

Overtaking and Car Following Model with Changing Speed Up-Limits and Changing Imaginary Slope Length

一维交通流仿真建模问题的研究具有显而易见的重要意义。元胞自动机方法是这一问题的一种代表性算法,它能有效模拟交通流的一些基本规律和现象,但它属于离散模型。传统的基于解析公式的模型偏重于从统计角度标定参数或者以确定方式获得车辆的动力行为。基于固支梁的虚坡模型以车辆阶段速度为目标,考察车辆的动态驾驶行为,在原有虚坡模型的基础上,分析了主动驾驶行为和被动减速行为,并通过改变速度上限和虚坡长度,间接地改变车辆动力以及前车对于后车的限速范围,使得车辆的加减速行为和跟车行为表现出更大的适应性。对仿真实例进行了计算,结果表明模型具有足够快的计算速度。

Apparently,simulation for one-lane traffic flow has very important meaning.Cellular automaton method is a typical method for this purpose.It could simulate some basic traffic regularities and phenomena.Yet it′s a discrete method.Traditional formula based methods tend to determine the parameters with static measures or set the power in a fixed way.An imaginary slope model based on a built-in beam takes the stage speeds as the target speeds to check and regulate the driving habits.Working on the basis of the primary imaginary slope model,this paper analyzed the initiative driving habits and passive deceleration habits.Then it indirectly changed the car power and the restricting speed range of a leading car for the following car by changing the car speed uplimits and imaginary slope lengths.In this way the acceleration and deceleration habits as well as the car following habits had more flexibility.It was applied to a simulation example and the calculation showed that it′s fast enough.