识别路段交通平均速度的一种相关分析法

Correlative Analysis of Identifying Mean Speed in A Road Section

本文应用线性系统识别理论，提出一种在轻交通情况下对较长周期内路段交通平均速度进行在线识别的算法。其关键是对路段输入、输出交通量中的随机信号进行相关分析，从而识别该路段交通的脉冲响应函数。优点是所需实测数据少，不必测量每车速度，检测器不必埋设第二个环形线圈。本文进而提出识别路段内平均车辆有效长度的算法及确定各交通参数的整套算法。应用结果表明这些算法可行。

Based on linear system identification theory,this paper presents a algorithmto estimate the on-line long term mean speed of vehicles in a road section with light traffic.The key is to analyse the correlation between the stochastic input and output traffic volumesignals in the section,while the pulse response function of the road section can be indentified.The merits are:few measurement data, without individual vehicle speed measurement andno need of second loop in a detector station,Accordingly,an algorithm to identify the meaneffective vehicle length and procedure to spccify all the traffic parameters of the road sectionare put forward.The application results show that these algorithms are feasible.