仿真交通流混沌特性研究

基于非线性跟驰模型建立了由五辆机动车组成的动态仿真模型,利用Matlab软件产生了五辆机动车的仿真交通流,给出了在一定参数组合下前后车辆之间的车头间距、速度差随时间变化的过程曲线.并结合实际交通系统的特点,对仿真结果做了理论分析.基于混沌时间序列分析方法,提出了证明非线性跟驰模型产生的仿真交通流具有混沌特性的一种方法,并分析了模型参数对仿真交通流动态特性的影响.该研究结果有助于进一步理解实际交通流系统的动态特性,并为短时交通流预测、诱导方法和智能交通控制提供理论依据.

Study on Chaos of Simulation Traffic Flow

Dynamic simulation model of five vehicles was established based on nonlinear car-following model. Utilizing the software of Matlab, the simulation traffic flow of five vehicles was generated. Under certain conditions, the curves of space headway and speed difference between the front vehicle and the following vehicle were given. The simulation results were analyzed in theoretically with real traffic flow. Based on chaotic time series analysis, a method was put forward to prove the chaotic characteristics of simulation traffic flow generated by nonlinear car-following model, and the influence of the model parameters on the dynamic characteristics of simulation traffic flow was analyzed The results are helpful to understand the dynamic characteristics of real traffic flow and provide theoretical foundation for the short time traffic flow forecasting, inducement and intelligent transportation control.