高速公路入口匝道启发式控制的仿真研究

Simulation of On-Ramp Heuristic Control in Expressway

为了解决高速公路交通事件引起拥堵的控制问题,提出了基于Bottleneck算法的高速公路入口匝道启发式控制方法并进行了数字仿真。针对交通事件引起拥挤时,事发点上游密度变大,下游密度变小的事实,选取交通密度代替Bottleneck算法中的流量作为控制参数,推导出拥堵条件下的入口匝道协调控制算法;针对单点层面调节缓慢,协调层面调节振荡与调节过度的缺陷,应用数字仿真方法,通过控制效果的仿真分析,提出了改进的调节率公式。以宁杭高速公路为背景,应用MATLAB仿真软件,进行了控制效果的仿真研究,从数字仿真层面表明了所提出的启发式控制算法的有效性。

In order to solve the control problem which led to congestion by expressway traffic incident, the method of expressway on-ramp heuristic control was proposed based on bottleneck algorithmic and digital simulation was put up. Aiming at traffic incident giving rise to congestion, the density of upstream largening and the downstream decreseenting, density was chosen as controls parameter replacing flow in Bottleneck algorithmic to derive the condition of congestion on-ramp coordination control algorithm. Improved regulating rate formula was proposed by simulation analysis of control effect and digital simulation because single point level regulated slowly and coordination level regulated oscillating and excessive. According to NingHang expressway, simulation analysis of control effect was put up using MATLAB simulation software. The digital simulation shows the validity of heuristic control algorithmic.