多車型自適應(yīng)性動態(tài)稱重閾值調(diào)節(jié)系統(tǒng)與仿真研究
[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.
【學(xué)位授予單位】:河北工業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:U492.321
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