Research On Neighborhood Train Cooperation Method Of Train Control System Based On Vehicle-vehicle Communication

In recent years,with the continuous exploration and research of new train control systems at home and abroard,the new train control system has made new breakthroughs in reducing trackside equipment,improving train autonomy and dynamic interval control.The new train control system is still in the early stage of research.Compared with the traditional train control system,it has major changes in system structure and function classification.Therefore,a complete design of new functions is required.The traditional centralized control of ground equipment has been transformed into an onboard-centered train control method.The train obtains the running status of the train ahead through the vehicle-to-vehicle communication.So it is necessary to study how the train can establish a tracking relationship with the preceding train,and be able to manage the tracking relationship during dynamic operation.With the development of train cooperative control technology,the way of individual train control has gradually changed to the way that cooperative train groups operate according to the cooperative control strategy.This method further shortens the headway between trains,improves the ability of the high-speed rail system to respond to emergencies.Therefore,it is necessary to study how trains communicate with trains in a wider range,share the information of nearby trains to a greater extent,and manage neighborhood collaboration relationships according to changes in operation plans.Therefore,in response to the demand for vehicle-to-vehicle communication and coordinated control in the new train control system,this thesis proposes the concept of dynamic neighborhood in rail transit,proposes a neighborhood train cooperative management mode and method,and designs train safety protection strategies under abnormal conditions.The correctness of the scheme is verified by formal modeling and simulation.Finally,this thesis discusses the new method of information synchronization for neighborhood collaboration.The main work of this theis is as follows:(1)The vehicle-to-vehicle communication schemes of the new train control system were compared,and the significance and feasibility of neighboring train cooperation were analyzed.The information exchange and collaboration management methods for neighboring collaboration related modules were designed,including tracing communication relationship management,and neighborhood communication relationship management.The management process includes the establishment,maintenance and disconnection of tracing communication,and the joining,maintenance and withdrawal of neighborhood relations.(2)In the process of neighborhood collaboration,the distribution of neighborhood control rights and management methods were designed.The interactive information in the neighborhood information processing of the neighborhood master train was analyzed.In view of the dynamic process of neighborhood relationship change,the management method of neighborhood mastership in neighborhood split and neighborhood combination scenarios was designed.(3)Different failure scenarios of wireless communication abnormalities in the neighborhood collaboration process were analyzed,and a sefety protection method based on the combination of neighborhood information sharing and control mode switching is designed.The overall train group’s ability to respond to external emergencies was improved.The design method is modeled and analyzed by the formal modeling method combining UML and HCPN,and finally verified by building a simulation model with Simulink.(4)Finally,the application of train neighborhood collaboration was expanded,and a new method of train information synchronization based on neighborhood cooperation was designed.In the case of not relying on a unified clock source,it is divided into a train group clock system synchronization protocol with or without a target.In order to illustrate the feasibility of the method,the synchronization protocol was theoretically proved and numerically simulated.There are 64 graphs,25 tables and 68 references in this thesis.