Human-Computer Interaction System Design For Dynamic Simulation Platform Of Urban Rail Transit System

With the increase of China’s population and the improvement of economic level,the pace of urban life is accelerating,the traffic congestion situation is aggravated,and people’s demand for urban traffic is getting higher and higher.As an important part of urban transportation,the development of urban rail transit is imminent.The traction power supply system with good performance can provide better energy for the operation of urban rail transit.Therefore,a fully physical urban rail transit traction power supply system dynamic simulation platform is built,which not only provides a physical environment for relevant research teams,but also provides an experimental platform for university students’ teaching.The subject of this thesis comes from the laboratory project " Dynamic Simulation Platform for Traction Power Supply of Urban Rail Transit".The project designs the traction power supply system model of low-power rail transit according to a specific proportion,simulates various operation conditions of the actual traction power supply system,and makes full use of scientific research resources to provide a new experimental environment for students’ teaching.The human-computer interaction system of urban rail transit dynamic simulation platform is a multifunctional system integrating communication,upper layer monitoring and control and experimental teaching mode according to the needs of the subject.This thesis first introduces the platform layout and underlying hardware structure,which is mainly composed of a control board and a power board with DSP and CPLD as the core to realize the functions of voltage and current sampling.The bottom control board feeds back the collected electrical quantity to the upper computer through the communication equipment,and the upper computer sends the control command to realize the closing and opening of the bottom relay,train speed regulation and start and stop.This system software uses C# language in.NET platform for Win Form programming,and the upper computer interaction system is designed according to the hierarchical distributed C/S mode structure.According to the requirements of the platform,the upper computer adopts two servers,of which 1# server includes two processes: monitoring software layer and optimized data interaction layer.The communication between processes is realized through the built-in functions of windows.The monitoring software mainly realizes data visualization and train operation monitoring;The data interaction layer is responsible for the data receiving and forwarding of the whole platform,and establishes communication with the bottom layer through Socket.Then,aiming at the shortcomings of the initial design of the monitoring software,this thesis optimizes the design of the system software architecture,data communication,interface display,and extends the functions of the monitoring software.Experimental results show that after software optimization,execution efficiency is improved,resource utilization rate is reduced and multi-thread data monitoring pressure is reduced.Finally,according to the experimental teaching needs of the platform,the upper computer adds 2# server as the student interface to provide course experiments for students’ teaching.The data interaction layer communicates with the student client through the Socket based on TCP / IP protocol according to the C/S mode.In this thesis,the client’s data transmission,program execution and experimental courses are specifically designed,in which the experimental operation instructions of the upper computer are controlled by the interaction layer to the bottom layer.In this thesis,four students’ experimental interface and experimental operation design are completed,and the effect is verified by debugging with the bottom layer.59 figures,6 tables,55 references.