Modeling And Simulation Of The Automatic Train Protection In Communication Based Train Control System

With the 3C technique has been widely applied to the train control system, there is a new generation of train control system " Communication Based Train Control " which is CBTC,and CBTC system is more and more widely used.It is becoming increasingly important that how to create a low cost,high accuracy,suitable for wireless local area network of the CBTC system's ATP system.In the actual operation of trains, it is a complex and changing environment,the traditional ATP system has been in urgent need of reform to adapt to the new generation of train control system,because it is dependent track circuit to transmit information,and can only achieve one-way signal transmission,and need for laying cables and setting a lot of transponders,has high investment cost and maintenance difficulties problems.WLAN-based CBTC's train protection system has become the development trend of ATP system.For such ATP system requires repeated testing,but if direct access to the trains and the track of the real test environment,will lead to high costs and insecurity.In order to overcome these drawbacks,this paper will establish a suitable model to simulate the operation of trains,as well as its environment,and use Lab VIEW platform to simulate the model in order to do variety of tests in trains which are applied CBTC.This paper also summaries and analyses the recently researches on WLAN-based CBTC technology,through the theoretical research on WLAN-based CBTC system and Automatic Train Protection system,and introduces in detail on ATP which based wireless communication systems,and designs the model and framework of the ATP system.And focus on modeling ATP's speed-distance braking curve on mathematical and dynamics ways.In the end,I use the Lab VIEW platform to simulation.By analyzing the simulation results,it verifies the correctness of the model.