检索结果-南通市图书馆

2011 Chinese Control and Decision Conference（CCDC）

作者： Ronghu Chi and Jia Li are with the School of Automation and Electrical Engineering,Qingdao University of Science and Technology,Qingdao 266042,PRC.Shangtai Jin and Zhongsheng Hou are with Advanced Control Systems Lab,School of Electronics & Information Engineering,Beijing Jiaotong University,Beijing 100044,PRC

Based on the idea of the active disturbance rejection control （ADRC）,a novel freeway traffic density control scheme is developed via ramp *** the designed tracking differentiator （TD） of ADRC,we can arrange a transition process to avoid system overshoot,and by designing an extended state observer （ESO） of ADRC,the state variables and comprehensive disturbances can be estimated and *** a result,the ADRC can produce the on-ramp entering traffic flow to realize the desired traffic density without requring any information about the freeway traffic ***,the capability and feasibility of the proposed ADRC is tested by some simulations.

关键词： Active disturbance rejection control (ADRC) Traffic density control Macroscopic traffic flow ramp metering

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Isolated ramp metering Based on Auto-Disturbances-Rejection Controller

Isolated Ramp Metering Based on Auto-Disturbances-Rejection ...

引用

2005全国博士生学术论坛（交通运输工程学科）

作者： Chen Dong, Chen Yangzhou (School of Electronic Information & Control Engineering, Beijing University of Technology, Beijing 100022)

＜正＞ This paper formulates the ramp metering control problem as a real- time feedback control problem. The nonlinear dynamical traffic flow density model for the ramp metering is developed. A novel control scheme based on Auto - Disturbances - Rejection Controller （ADRC） is applied to ramp metering, which is independent of the plant parameter. Simulations are performed for the local ramp metering using the new nonlinear feedback control law that shows encouraging results. The results indicate that this algorithm is effective for the limited plant parameter range. It can maintain the traffic flow density of mainline in a desired value. The performance of our algorithm is better than ALINEAR algorithm.

关键词： ramp metering traffic flow control auto disturbances rejection controller

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Iterative learning control based ramp metering tracking iteration-varying trajectories with internal model

Iterative learning control based ramp metering tracking iter...

引用

2009中国控制与决策会议

作者： Jingwen Yan,Zhongsheng Hou Advanced Control Systems Lab,Beijing Jiaotong University,Beijing 100044,China

＜正＞In this work,we focus on iterative learning control（ILC） based ramp metering for tracking iteration-varying trajectories which are described by an internal model between two consecutive *** internal model is inserted into the ILC law,which is different from the classical one.A dynamic linearization of the freeway macroscopic traffic flow model along the iteration axis and lifting technique are used for theoretical analysis,which eliminate the needs for identical initialization condition and X -norm that are two fundamental ILC issues in the time *** simulations show the superiority of this control strategy compared with the classical ILC.

关键词： Iterative Learning control ramp metering iteration-varying trajectories internal model

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Double-layer ramp-metering model for incident congestion on expressway

引用

Journal of Traffic and Transportation Engineering(English Edition) 2014年第2期1卷 129-137页

作者： Yihu Wu Dan Yu Wei Yu Tao Qin Yifen Li School of Traffic and Transportation Engineering Changsha University of Science and Technology Engineering Research Center of Electric Power & Traffic Safety Monitoring & Control and Energy Conservation Technology Ministry of EducationChangsha University of Science and Technology

In order to ensure stable traffic capacity and avoid incident congestion, a double-layer ramp metering model is proposed in this paper, based on coordination control theory, to predict and control the traffic flow at each on-ramp, when there is incident congestion on the expressway. The function of the lower model is to recognize where the incident congestion exists, based on an adaptive neural net- work with inputs of traffic flow, velocity and density. The outputs of the lower model are the number of section where the congestion occurs, the number of ramp which should be controlled, and real-time traffic flow information. These outputs should be transmitted to the upper model. The function of the upper model is to design the ramp-metering strategy based on nonlinear theory. The outputs of the up- per model are a ramp-metering rate and traffic-flow state after ramp controlling on the expressway. The results of the simulation show that the double-layer ramp metering model could shorten the delay by about 25%, and the variance of the model results is 0. 002, which could certify the control strategy is equitable.

关键词： traffic engineering double-layer model incident congestion ramp metering urban expressway

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Integrated control of highway traffic flow

引用

Journal of Control and Decision 2018年第1期5卷 19-41页

作者： Yihang Zhang Petros A.Ioannou Department of Electrical Engineering University of Southern CaliforniaLos AngelesCAUSA

Several efforts have been made during recent years on the control of traffic flow using ramp metering,variable speed limit and lane change *** of these techniques reported significant traffic mobility improvements in macroscopic simulations,which cannot be confirmed in some microscopic simulation *** demonstrate that the lack of travel time improvement is due to the forced lane changes at the bottleneck which introduce a capacity *** this paper,a lane change controller is proposed which provides lane change recommendations to avoid the capacity *** with the lane change control,a feedback linearisation variable speed limit controller which maintains the bottleneck flow at the maximum level and coordinates with ramp metering controllers is *** integrated VSL,RM and LC controller can improve system performance,manage the ramp queues and maintain the fairness between mainline and on-ramp *** simulations show consistent improvements under different scenarios.

关键词： Variable speed limit lane change ramp metering feedback linearisation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A simulation study of using active traffic management strategies on congested freeways

引用

Journal of Modern Transportation 2012年第3期20卷 178-184页

作者： Ramakrishna VADDE Joseph O. SAI Mohammed A. FARUQI Pat T. LEELANI Texas A&M University-Kingsville Department of Civil Engineering MSC 194Kingsville Texas 78363 USA

The main objective of this study is to evaluate the effectiveness of using active traffic management （ATM） strategies on freeways in terms of the driver＇s behavior and operational impacts. A few test beds were selected to evaluate the impacts of ATM such as speed harmonization, shoulder utilization, and ramp metering. Test beds used in this study were at places where an ATM is either proposed or previously implemented, i.e., where data exists for condi- tions prior to and after the implementation of ATM. Data collected from the test beds were used in a simulation model to evaluate the impacts of each ATM strategy on speed, travel time, and crash rates. Simulation results indicated that the implementation of speed harmonization on US 90 showed a 14% reduction in crashes and a 2%-3% increase in freeway speed; the implementation of hard shoulders on US 90 showed a 39% increase in travel time, 22% increase in freeway capacity and 60% decrease in delays; and the implementation of ramp metering on US 59 between Bissonnet St. and Fondern road showed a decrease of 23 % in freeway travel time, a 14% increase in freeway speed and 11% decrease in accident rates.

关键词： active traffic management VISSIM speed harmonization hard shoulder ramp metering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Queue Storage Design for Metered On-ramps

引用

International Journal of Transportation Science and Technology 2013年第1期2卷 47-63页

作者： Zhongren Wang Division of Traffic Operations California Department of Transportation1120 N StreetMS-36SacramentoCA 95814

Queue storage at a metered freeway on-ramp is an essential design element for metered on-ramps to prevent on-ramp queue from extending beyond *** this paper,various existing methodologies that are used to size the queue storage at metered on-ramps were first *** was found that queue storage sized using 7%of peak hour on-ramp demand is widely accepted in practice.A limited dataset collected in California helps provide some reality check for this *** is recommended that queue storage be recognized as an indispensable design element at metered on-ramps,and detailed sizing guidance be developed in the highway geometric design policy of the American Association of State Highway and Transportation Officials(AASHTO).

关键词： On-ramp Design Queue Storage Design ramp metering

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：