车辆行驶的随机虚坡模型

Randomized Virtual Slope Model Proposed for the Simulation of the Process of Running Vehicles

研究交通流建模问题,其中元胞自动机模型是最具代表性一种模型。但是,该模型中难以适应道路宽度变化的情况,同时其随机减速规则不能较全面地体现车辆行驶随意性。为实现上述车辆行驶随意性,提出了一种随机虚坡模型。在虚坡模型的基础上,引入了附加的虚坡宽度,虚坡宽度包含有多个随机变量,用以对车辆行驶的多重随意性仿真。结果得到了一种连续且随机的车辆行驶虚坡模型。仿真实例表明,模型能方便地用于多车情形,能在产生不同随机行为的同时,保证车辆速度连续变化并满足约束条件。

A lot of research work has been done for the modeling of traffic flow.And cellular automaton model is one of the most typical models.But this kind of model has difficulties for roads with un-constant width.And it＇s deceleration rule couldn＇t reveal randomization habits of vehicles thoroughly.To this end,a so call randomized virtual slope model is proposed herein.It is based on the virtual slope model,and additional slope width is introduced.Several randomization variables are included in the additional slope width.In this way the multiple randomization habits of vehicles were simulated and a randomized virtual slope model for running vehicles was gotten.Simulation example showed that it is easy to be operated for the case of many cars,and the constrain conditions could be obeyed while the calculated velocities were continuous.