快速路系统密度控制器设计与参数辨识  

Density controller design and parameter identification of freeway systems

作　　者：谢劲松[1] 范炳全[1] 

机构地区：[1]上海理工大学管理学院,上海200093

出　　处：《计算机工程与应用》2009年第20期192-194,223,共4页Computer Engineering and Applications

基　　金：上海市重点学科建设项目(No.T0502);上海市科委国际合作研究项目(No.062107043);上海理工大学博士启动基金(No.X693);上海市研究生创新基金项目

摘　　要：车辆之间密度、车头时距的不均匀分布,导致快速路系统效率降低。为了提高其效率,提出了密度控制器设计方法。它能控制车辆按恰当的速度行驶,能使快速路各段密度指数收敛于期望密度,从而获得均匀的密度、车头时距分布。然后通过仿真实例来辨识模型参数,结果表明当所辨识的模型参数接近1时,系统在此控制器作用下能获得平稳的交通流。由此说明所提控制器设计能提高系统效率、指导实践。The density and headway’s non-uniformity distribution between vehicles in the freeway system caused its low efficiency.To improve the efficiency,a density controller design was put forward.It could control the vehicles’ operation by appropriate speed and make each section’s density exponentially converge to desired density.Uniform distribution of density and headway was obtained.The model parameters were identified by simulative examples.The simulative results demonstrate the freeway system will obtain smooth and stable traffic flow under this controller when identified parameters are approaching 1.Therefore the proposed controller can improve the system efficiency and guide practice.

关 键 词：快速路系统 密度控制器设计 均匀分布 指数收敛 参数辨识 

分 类 号：U491[交通运输工程—交通运输规划与管理]