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高速公路非线性反馈模糊逻辑匝道控制器
引用本文:梁新荣,刘智勇,毛宗源.高速公路非线性反馈模糊逻辑匝道控制器[J].控制理论与应用,2006,23(1):99-102.
作者姓名:梁新荣  刘智勇  毛宗源
作者单位:1. 华南理工大学,自动化科学与工程学院,广东,广州,510640;五邑大学,信息学院,广东,江门,529020
2. 五邑大学,信息学院,广东,江门,529020
3. 华南理工大学,自动化科学与工程学院,广东,广州,510640
基金项目:广东省自然科学基金资助项目(010486)
摘    要:入口匝道控制是高速公路交通控制和智能运输系统的重要组成部分,但现有的入口匝道控制效果尚不理想.为此,本文提出一种非线性反馈方法用模糊逻辑进行入口匝道控制.建立了高速公路交通流动态模型,在此基础上,结合模糊逻辑理论设计了非线性反馈匝道控制器,根据密度误差和误差变化用模糊控制决定匝道调节率,模糊变量选用三角形隶属度函数,并制定了包含56条模糊规则的规则库,最后用MATLAB软件进行系统仿真.结果表明该控制器具有优越的动态和稳态性能,它能使高速公路主线交通流密度保持为设定的期望密度,该方法用在高速公路入口匝道控制中效果良好.

关 键 词:高速公路  模糊控制  匝道调节  反馈控制  交通流模型
文章编号:1000-8152(2006)01-0099-04
收稿时间:8/4/2004 12:00:00 AM
修稿时间:6/1/2005 12:00:00 AM

Nonlinear feedback ramp controller in freeway based on fuzzy logic
LIANG Xin-rong,LIU Zhi-yong,MAO Zong-yuan.Nonlinear feedback ramp controller in freeway based on fuzzy logic[J].Control Theory & Applications,2006,23(1):99-102.
Authors:LIANG Xin-rong  LIU Zhi-yong  MAO Zong-yuan
Affiliation:College of Automation Science and Engineering,South China University of Technology,Guangzhou Guangdong 510640,China;School of Information,Wuyi University,Jiangmen Guangdong 529020,China
Abstract:The on-ramp control is considered as an important component of freeway traffic control and intelligent transport systems,but the results of existing on-ramp control are not satisfactory.A nonlinear feedback method is proposed for on-ramp metering by using fuzzy logic.The freeway traffic flow dynamic model is built.Based on the model and in conjunction with the fuzzy logic theory,the nonlinear feedback ramp controller is designed. The ramp metering rate is determined by the fuzzy control based on the density tracking error and error variation.Triangle curves are used for the membership functions of the fuzzy variables.The rule base including 56 fuzzy rules is also established.Finally,the control system is simulated in MATLAB software.The result shows that the controller designed has good dynamic and steady-state performance,and can achieve a desired traffic density along the mainline of a freeway.This method is effective to the on-ramp control.
Keywords:freeway  fuzzy control  ramp metering  feedback control  traffic flow model
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