关键词: 应答器故障, 随机Petri网, 等级转换, 建模

Abstract: Researching transponder failure can cause a scene for the train control system to degrade, and it researches the scene of the transformation between the train control system in different grades, by using stochastic Petri net theory, in order to ensure and improve the safety of the train running environment. In the model, three factors that may result in the failure of the transponder：symbol error, transmission delay, transmission failure are carried out to analyze and model. When the scene going through downgrade, it analyzes and models the conversion level of the scene, train control equipment attempts to connect the GSM-R wireless network, the system is upgraded to CTCS-3 for the model. Finally, by using TimeNet 4.0 to measure the correctness of the model, it obtains the model in the probability distribution curve of the various scenes, analyzes the CTCS-3 degradation performance quantitatively and qualitatively.

Key words: transponder failure, stochastic Petri net, level conversion, modeling