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宏观标定方法在Wiedemann驾驶行为阈值研究中的应用

, PP. 115-119

Keywords: 交通工程,驾驶行为阈值,图像识别,遗传算法,宏观标定平台

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Abstract:

基于流量速度图对Wiedemann74模型参数标定的宏观方法进行了研究,建立了集成VISSIM、Matlab、ExcelVBA的参数标定平台,以最小化流量速度图的实测值与仿真值的差异为优化目标,应用图像识别方法判别图像的差异性,利用遗传算法优化参数值,实现了参数自动寻优的迭代过程。建立的参数标定平台能够利用流量、速度等宏观运行数据标定驾驶行为阈值参数,为利用检测器数据实现自动化标定提供了有效手段,为分析驾驶行为特点提供了方法,解决了VISSIM软件中默认参数不适合我国交通状况导致仿真精度不高的问题。利用路侧激光检测器采集长沙市南二环路断面交通数据,根据标定后的参数、实测数据对Wiedemann模型的驾驶行为阈值曲线进行了拟合,根据驾驶行为分区对长沙市南二环路的驾驶行为进行了分析。

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