Application Of Interlocking Subsystem Based On Resource Self-Allocation In Vehicle To Vehicle Communication System

The next generation CBTC train control system based on vehicle communication has gradually become an important research object in the field of rail transportation.The arrival of the vehicle to vehicle communication technique means that the train will gradually get rid of the ground control and become the individual with high degree of independent control ability.Train control system innovation is bound to be accompanied by a number of technological innovation and breakthroughs in the field of application.As an important part of the signal system,the interlocking subsystem urgently needs to produce more profound integration with the train control system.Therefore,the new vehicle to vehicle communication system abandons the traditional on-orbit side of the independent interlocking structure,in turn the interlocking subsystem is integrated into the vehicle on-board controller.In this way,it could effectively reduce the system failure rate and system maintenance costs,and improve the level of intelligent vehicle.Based on the development status of advanced train control system in the world,this thesis summarizes the development direction of future train control system,and clarifies that streamlining the trackside equipment is one of the development goals of train control system.On the basis of studying the CBTC system which has been mature at present,the main problems existing in the CBTC system are analyzed and the corresponding solutions are explored.Aiming at the shortcomings of CBTC system,the architecture of next generation CBTC system based on vehicle communication is proposed.The original CBTC system is improved on the function distribution and subsystem composition of the vehicle communication system,which can correct the complex system interface,the long response time and the lack of flexibility.Based on the preliminary structure of the vehicle to vehicle communication system,this thesis focuses on the design of the line resource management subsystem.The basic functions of the former interlocking system was refined to "pave the way",a clear that route control is the means to achieve the basic functions rather than the basic function itself.Through the detailed classification of switch,signal machine,screen door and so on;the scheme of resource management instead of route control is put forward.The tasks of the Intelligent Vehicle On-board Controller(IVOC),the Object Controller(OC)and the Intelligent Train Supervision(ITS)and the interactive process of them to achieve the basic functions of former interlocking system are described.According to the system function architecture,the line resource management subsystem is analyzed and the module is designed.The software of the Vehicle Path Locking(PLU)module and the Object Controller(OC)is completed.In order to develop safe and reliable line resource management software in the vehicle to vehicle communication system,this thesis uses the theory of time automata to describe the line resource management subsystem by formal semanties,using the UPPAAL tool based on time automata theory to carry on the line resource management subsystem typical scenarios Modeling Analysis.The typical scenario chooses the switch control scenario which can best embody the characteristics of the line resource management subsystem,and explains the control flow of the normal condition and the abnormal situation respectively.In the model verification phase,the VV&A principle is strictly followed to ensure the correctness and credibility of the model.Finally,this thesis discusses and studies the possible resource competition problem in resource allocation process,establishes the dynamic programming model under the conflict of two vehicles,and gives the optimal value function.The simulation results show that the optimal solution is obtained in the case of two-vehicle.Further research on the allocation of resources can also be applied to the operation and management of trains,to guide the preparation of train operation plans,to ease traffic pressure.