基于OVM模型的交通流混沌研究

研究基于OVM模型的交通流混沌问题。用Matlab结合C 语言编写OVM模型的仿真程序来产生交通流时间序列。在一定的参数组合下,仿真研究交通流车队中不同序号的前后车辆之间的车头间距变化过程。通过分析这种车头间距变化过程的变化曲线并利用小数据量方法计算Lyapunov指数,证明了基于OVM模型产生的交通流中存在着混沌现象。讨论模型参数和仿真试验参数对该理论交通流运动状态的影响,给出相应的仿真研究结果,得出对于研究与应用交通流理论有益的结论。

Study on Chaos in Traffic Flow Based on the Optimal Velocity Model

The chaos in traffic flow based on the Optimal Velocity Model(OVM) is studied.The traffic flow is generated by OVM using the simulation software programmed in matlab and C~( ) language.The changing processes of the headway of the front vehicle and the following vehicle in the traffic flow are(simulated).The changing processes and the Lyapunov exponents is calculated by the small data set method,the result shows that the chaos exactly exist in the traffic flow of OVM.The influences of the model(parameters) on the movement of the traffic flow are discussed and the relevant simulation results are given.Finally,the useful conclusion for study and application of traffic flow theory is presented.