| 快速路通道动态OD流估计模型 |
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| 引用本文： | 李俊卫,林柏梁,王海星,耿雪霏.快速路通道动态OD流估计模型[J].北京交通大学学报(自然科学版),2008,32(6). |
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| 作者姓名： | 李俊卫 林柏梁 王海星 耿雪霏 |
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| 作者单位： | 轨道交通控制与安全国家重点实验室，交通运输学院 |
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| 基金项目： | 国家自然科学基金
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铁道部科技研究项目
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| 摘 要： | 基于快速路通道的主干道和匝道出入流量信息,提出了一个新的动态OD矩阵估计模型和在线估计算法.文中引入宏观交通流模型以计算旅行时间,并把模型参数也作为状态变量进行估计,相应增加了新的测量方程.该文构建了新的动态OD估计状态空间模型,采用了含有约束条件的Unscented kalman filter(UKF)算法,运用仿真数据进行评估,结果表明,即使在拥堵状况下,提出的模型和算法也能达到很好的精度.
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| 关 键 词： | 交通流 OD估计 快速路通道 卡尔曼滤波 |
A Model of Estimating Time-Varying OD Flows for Expressway Corridors |
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| LI Junwei,LIN Boliang,WANG Haixing,GENG Xuefei.A Model of Estimating Time-Varying OD Flows for Expressway Corridors[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2008,32(6). |
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| Authors: | LI Junwei LIN Boliang WANG Haixing GENG Xuefei |
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| Abstract: | On the basis of mainline traffic counts and ramp flow measurements,this research presents a dynamic system model and its on-line estimation algorithm for time-varying expressway origin-destination matrices. The proposed model employs a macro-traffic flow model to estimation travel times of OD flows and uses parameters of the traffic model as state variables, which adds to the constraint function of the system. The research employs a newly developed filtering technique, called Unscented Kalman Filter(UKF). The proposed model is evaluated with simulation experiments. The results indicate that the proposed method is reasonably and stable. |
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| Keywords: | traffic flow origin-destination(OD) estimation expressway corridor Kalman Filter |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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