The invention relates to an expressway heterogeneous traffic flow variable speed limit control method based on edge calculation, which comprises the following steps: based on multi-objective optimization, carrying out standardization processing on average delay and average queuing length indexes by utilizing a threshold value method, and setting the indexes as a reward function of the variable speed limit control method; deploying an RSU and a variable speed limit control agent to integrate an edge computing node, and extracting expressway heterogeneous traffic flow information to serve as a state space of an EDQN algorithm; performing feature dimension reduction on the state space of the heterogeneous traffic flow by using a convolutional neural network; importing a result output by the CNN network into a full connection layer, executing an action and outputting a Q value of a current time step; storing samples in a Prioritized reply Buffer, wherein the KL divergence is used as the priority of training samples for sorting, so that the loss function is minimized, and the variable speed limit control effect is effectively improved; and 6, judging whether the greedy algorithm converges or not. According to the method, the reward function based on multi-objective optimization is considered, the overall traffic efficiency is improved, and bottleneck congestion is reduced.

    本专利涉及一种基于边缘计算的高速公路异质交通流可变限速控制方法,包括:基于多目标优化,利用阈值法对平均延误和平均排队长度指标进行标准化处理,并设置为可变限速控制方法的奖励函数;部署由RSU和可变限速控制代理集成边缘计算节点,提取高速公路异质交通流信息,作为EDQN算法的状态空间;使用卷积神经网络对异质交通流的状态空间进行特征降维;将CNN网络输出的结果导入到全连接层,执行动作并输出当前时间步的Q值;在Priorized replay Buffer存储样本,利用KL散度作为训练样本的优先级进行排序,从而最小化损失函数,有效提高可变限速控制效果;步骤六、判断贪婪算法是否收敛。本发明考虑了基于多目标优化的奖励函数,提高整体交通效率并减少瓶颈拥堵。


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    Titel :

    Expressway heterogeneous traffic flow variable speed limit control method based on edge calculation


    Weitere Titelangaben:

    一种基于边缘计算的高速公路异质交通流可变限速控制方法


    Beteiligte:
    YU HAIYANG (Autor:in) / LIN YUAN (Autor:in) / REN YILONG (Autor:in)

    Erscheinungsdatum :

    2021-10-26


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen / G06Q Datenverarbeitungssysteme oder -verfahren, besonders angepasst an verwaltungstechnische, geschäftliche, finanzielle oder betriebswirtschaftliche Zwecke, sowie an geschäftsbezogene Überwachungs- oder Voraussagezwecke , DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES





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