论文标题
大规模动态充气网络的两层自适应信号控制框架:将有效的最大压力与周长控制结合
Two-layer adaptive signal control framework for large-scale dynamically-congested networks: Combining efficient Max Pressure with Perimeter Control
论文作者
论文摘要
流量响应信号控制是一种具有成本效益且易于实施的网络管理策略,在改善具有动态特征的拥挤网络中的性能方面具有很高的潜力。最大压力(MP)分布式控制器由于理论上证明的队列稳定能力和在特定假设下的最大化能力而获得了显着流行。但是,其在饱和条件下的有效性值得怀疑,而由于仪器成本高,网络范围的应用受到限制。基于宏观基本图(MFD)的概念的外围控制(PC)是一种最新的汇总策略,可调节区域之间的交换流量,以保持最大的区域旅行生产并防止过度饱和。然而,同质性假设在充血状态几乎是现实的,从而损害了PC效率。在本文中,通过介观模拟评估了嵌入在两层控制框架中的PC和MP的范围范围,平行应用PC和MP的有效性。为了降低MP的实施成本而没有大幅绩效损失,我们提出了一种确定部分MP部署的关键节点的方法。包含有限队列和溢出式考虑考虑的商店和前向范式的修改版本用于测试所提出的框架的不同配置,用于真正的大规模网络,以中等和高度拥挤的场景。结果表明:(i)在两种需求方案中,对MP和PC的控制均优于单独的MP和PC应用程序; (ii)与全网络实施相比,降低的临界节点集中的MP控制会导致相似甚至更好的性能,从而大大降低成本; iii)拟议的控制方案即使在需求波动的平均值的20%下,也可以提高系统性能。
Traffic-responsive signal control is a cost-effective and easy-to-implement network management strategy with high potential in improving performance in congested networks with dynamic characteristics. Max Pressure (MP) distributed controller gained significant popularity due to its theoretically proven ability of queue stabilization and throughput maximization under specific assumptions. However, its effectiveness under saturated conditions is questionable, while network-wide application is limited due to high instrumentation cost. Perimeter control (PC) based on the concept of the Macroscopic Fundamental Diagram (MFD) is a state-of-the-art aggregated strategy that regulates exchange flows between regions, in order to maintain maximum regional travel production and prevent over-saturation. Yet, homogeneity assumption is hardly realistic in congested states, thus compromising PC efficiency. In this paper, the effectiveness of network-wide, parallel application of PC and MP embedded in a two-layer control framework is assessed with mesoscopic simulation. Aiming at reducing implementation cost of MP without significant performance loss, we propose a method to identify critical nodes for partial MP deployment. A modified version of Store-and-forward paradigm incorporating finite queue and spill-back consideration is used to test different configurations of the proposed framework, for a real large-scale network, in moderately and highly congested scenarios. Results show that: (i) combined control of MP and PC outperforms separate MP and PC applications in both demand scenarios; (ii) MP control in reduced critical node sets leads to similar or even better performance compared to full-network implementation, thus allowing for significant cost reduction; iii) the proposed control schemes improve system performance even under demand fluctuations of up to 20% of mean.