Modeling And Simulation Of CTCS-1 On-board Subsystem Based On Simulink/Stateflow

China's railways are constantly developing at a high speed.Despite the increasing coverage of high-speed railways,existing lines still occupy a large proportion in China's railway operation system.The study of CTCS-1 train control system is optimized operating quality and improving the safe operation of trains are of great significance.The train control system can be divided into vehicle-mounted subsystem and ground subsystem.The C1 train control system has not been put into operation,and it still has many research contents that need to be solved and excavated.The CTCS-1 train control system is a train control system scheme suitable for new or retrofitted lines with train speeds below 200 km/h.Due to the preview properties of the scheme,many aspects have not been verified.C1 vehicle subsystem modeling and simulation research,through the results of the verification of C1 technical solutions and attempts to provide constructive suggestions.Aiming at the problems existing in the C1 train control system,this paper proposes a model-based vehicle subsystem modeling and simulation research program and conducts in-depth research.The on-board equipment is mainly responsible for completing the real-time calculation of the continuous speed control curve of the target distance,and protecting the train from overspeed according to the generated curve.The main research contents of this article are as follows:(1)After in-depth study of the device function and interface relationship of the C1 on-board subsystem,the information interaction between each functional module is analyzed,and four key modules of the on-board subsystem are abstracted based on the on-board function and information interaction relationship Modeling and simulation process of C1 vehicle-mounted subsystem under model-based modeling method.(2)Designed the overall framework of the functional modules of the on-board subsystem,analyzed the four key modules of the on-board subsystem,designed their internal and external interfaces,and focused on the on-board ATP module.(3)Simulink / Stateflow is used to establish each functional model of the on-board subsystem.For the complete operation of the model,a train simulation model and a driving permission model are added.(4)Use Simulink testing and verification tools provided by MATLAB to identify hidden errors in the model,perform coverage detection on the model,and perform formal verification and systematic testing on the model.In order to make all the functional models of the whole vehicle-mounted subsystem into a complete system model,this paper designs and constructs a whole model of the driving permission scene,so that the whole system model can be simulated and operated.After applying the real data to the system model,the simulation results were output and the results were analyzed.Finally,the process of automatically converting the vehicle-mounted subsystem model into C ++ code is made.