Design And Implementation Of Subway Train Dynamic Simulation System Based On Modular C/S Architecture

The scale and population of cities are increasing significantly along with the rapid development of society. Whether during the commuting time or the travel minutes, the rigid demands of population flow have greatly exceeded the load capacity of ground traffic. In order to alleviate the increasingly serious traffic congestion problems, urban rail transit with the advantages of rapidity, high-capacity and convenience has become an important indicator of urban traffic capacity. However, urban rail transit system, mainly in metro system, is a high dimension, multi particle complex system, which continuously conducts iteration of space-time and interaction of passengers. Therefore, train delays are on occasion taken place due to human or natural factors among the process of system operation, making it unable to satisfy the needs of population flow. Hence, this thesis proposed a dynamic simulation system for subway train with the method of modular Client/Server architecture. In general, this system is based on the framework of timetable, stations and dynamic running adjustment, which is aimed to simulate function modules such as generations of train diagram, simulations of train operation,2D supervision of train operation, etc, and to achieve the purpose of train operation adjustment by setting the delay scenes and designing the adjustment algorithm. Detailed contents are as follows:Firstly, based on the function of dynamic simulation system, research on modular design is carried out. Considered the overall requirement, the dynamic simulation system has been divided into scheduling based network layer, operation monitoring based line layer and passenger based station layer, has been conducted with the idea of modular designs to reduce the coupling of application processing, has adopted the C/S design pattern to commit the interface of transaction processing and has eventually formed nine modules such as parameter configuration module to accomplish the interior design and communication interface of the function such as train diagram management, train operation monitoring and passenger interaction management.Secondly, based on the basic data of Beijing Yizhuang metro line, research on module implementation and function test is studied. Data of interval length, stations and trains are used as the underlying data of system. Method of database E-R model is used as the back-end of system. Mode of winForm control is used as the front-end of system. To accomplish the operation part, test cases have been conducted during both the peak period and the off-peak hours to implement the function of timetable generation and operation monitoring. It is proved that the system has a good stability and reliability.Lastly, according to the established dynamic simulation system, research on dynamic adjustment scenarios of train delays is studied. The train operation adjustment model has been built in order to restore the running punctuality and the improved particle swarm optimization algorithm has been used to solve the parameters and analyze the model. Meanwhile, delayed scenes have been created to combine the research results of dynamic adjustment with the simulation system. It is proved that the way of dynamic adjustment is not only able to effectively eliminate the delays caused by the accident, but also suitable for the software implementation of simulation system, which make the system has better ability to cope with the emergencies.