基于耦合映象模型的交通流混沌现象分析

Chaos in traffic flow based on coupled map model

针对交通流耦合映象模型中出现的混沌现象,利用Matlab程序产生交通流时间序列,仿真研究了交通流车队中前后车辆之间车头间距的变化过程,并在此基础上讨论了参数变化对交通流运动状态的影响。结果表明,在该模型产生的交通流中,系统由于参数变化沿着Pomeau-Manne-ville途径走向混沌,从而验证了混沌现象在交通系统中确实存在。

In order to study the chaos in the traffic flow based on couple map model, the time series of the traffic flow are generated by using Matlab program. The changing process of the space headway between the front and the following vehicle are obtained by the simulation. The influence of the model parameters on the movement of the traffic flow is discussed. The analysis of dynamic phase transitions in the traffic flow shows that the chaos exists in the traffic flow indeed, and the system has the characteristics of chaos following the Pomeau-Manneville path due to the variety of model parameter. 5 figs, 10 refs.