多车型自适应性动态称重阈值调节系统与仿真研究

发布时间：2018-11-04 12:08

【摘要】：超载运输是一个综合性社会问题,给社会造成巨大的损失。采用科学合理的方法治理超载超限问题,在减少超载车辆对道路破坏的同时,缓解道路拥堵现状是我们亟待解决的问题。本研究基于动态超载控制技术的基础理论,提出多车型自适应性动态称重阈值调节系统,该系统可在车辆排队过长时将动态称重设备固定阈值检测模式转变成自适应性阈值调节检测模式,从而实现根据道路交通量的大小完成对货车的动态管理。首先,本文介绍适应于多车型的自适应动态称重阈值模型,并通过对高速公路货车进行随机抽样,分析其超载量概率分布趋势,对多车型的自适应性动态称重阈值计算模型中阈值增量i??的取值方法进行确定。其次,基于超载管理站的实际应用特点,并结合多车型自适应性超载控制技术,提出在高速公路入口设置自适应性超载管理站的理念,并设计出高速公路入口自适应超载控制管理站的布局方案,以及管理站的工作流程。再次,针对不同超载超限管理站布局,分析其超载控制站车辆运行特性,基于马尔可夫状态转移理论建立车辆排队模型。并基于超载管理站的实际应用特点,结合多车型自适应性超载控制技术,在超载超限管理站排队模型的基础上确定开启自适应性阈值动态称重系统的界定标准,建立多车型自适应性动态称重阈值调节系统。最后,运用VISSIM软件对该系统在不同超载管理站布局下、以及不同车辆到达率下进行模拟仿真。利用VisVap模块模拟超载管理站自适应控制过程,实现根据不同排队长度设定不同的称重阈值,并实现超载检测站的闭站决策。结果表明,与传统固定阈值动态称重系统相比,多车型自适应阈值调节系统的应用可在降低货车行程延误的同时增加超载车辆捕获率,有效改善超载现象,从而增加道路的使用寿命,减少道路的损坏。同时验证入口自适应超载检测站布局在增加超载车辆捕获率及减少非超载车辆延误上,相比传统布局具有明显优势。
[Abstract]:Overload transportation is a comprehensive social problem, which causes great loss to the society. It is an urgent problem to solve the overload problem by adopting scientific and reasonable methods to reduce the road damage caused by overloaded vehicles and to alleviate the current situation of road congestion at the same time. Based on the basic theory of dynamic overload control technology, a multi-vehicle adaptive dynamic weighing threshold regulating system is proposed in this paper. The system can change the fixed threshold detection mode of dynamic weighing equipment into the adaptive threshold adjusting detection mode when the vehicle queue is too long, and realize the dynamic management of the freight car according to the traffic volume of the road. Firstly, this paper introduces an adaptive dynamic weighing threshold model for multi-vehicle models, and analyzes the probability distribution trend of overloading through random sampling of freeway freight cars. The threshold increment in the adaptive dynamic weighing threshold calculation model for multi-vehicle models? To determine the value of the method. Secondly, based on the practical application characteristics of overload management station and combined with multi-model self-adaptive overload control technology, the idea of setting self-adaptive overload management station at the entrance of expressway is put forward. The layout scheme of the adaptive overload control station at the expressway entrance and the workflow of the station are designed. Thirdly, according to the different overloading management station layout, the vehicle operation characteristics of the overload control station are analyzed, and the vehicle queuing model is established based on Markov state transition theory. Based on the practical application characteristics of overload management station and combined with multi-vehicle self-adaptive overload control technology, the threshold dynamic weighing system is defined on the basis of queue model of overload and overload management station. A multi-vehicle self-adaptive dynamic weighing threshold adjusting system is established. Finally, VISSIM software is used to simulate the system under different overloading management station layout and different vehicle arrival rate. The VisVap module is used to simulate the adaptive control process of overload management station, to set different weighing threshold according to different queue length, and to realize the closed station decision of overload detection station. The results show that compared with the traditional fixed threshold dynamic weighing system, the application of multi-vehicle adaptive threshold adjusting system can reduce the vehicle travel delay while increasing the overloading vehicle capture rate, and effectively improve the overload phenomenon. Thus increasing the service life of the road and reducing the damage of the road. At the same time, it is verified that the entrance adaptive overload detection station layout has obvious advantages over the traditional layout in increasing the overloading vehicle capture rate and reducing the non-overload vehicle delay.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U492.321

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