高速公路交通流密度的主线速度控制设计方法

结合高速公路出入口的实际设置情况、高速公路交通流的运行特点以及高速公路主线速度控制方式的实际需要,对经典高速公路宏观动态交通流模型进行了一定的修正;针对改进后的交通流模型,利用非线性系统控制中的反步设计方法,给出了求解控制率的矩阵方程;并提出了使用模糊控制方法进行主线速度控制的设计思路,为解决交通流模型难以确定、交通流参数难以检测等情况下的交通流密度主线速度控制问题提供了一种新方法。

Design Methods for Main Line Speed Control of Expressway Traffic Flow Density

Considering the actual design of expressway ramp,the moving characters of expressway traffic flow and the requirement of main line speed control,the classical macro and dynamic model of expressway traffic flow is amended in this paper.On the basis of this improved traffic flow model,the matrix equation of speed control variable is obtained by using the backstepping method.Furthermore,fuzzy control is applied to the expressway speed control,and it provides a new effective method for speed control of the traffic flow density even if the traffic flow model is imprecise or some traffic flow parameters can not be detected.