Research on GNSS Based High-Speed Train Multi-Sensor Information Fusion Positioning

Train positioning plays a significant role in Train Control System, particularly its accuracy and reliability is of chief importance for high-speed train system. This paper introduces the evolution of Train Control System and conventional train location methods. According to comparative research on train location methods,it is shown that GNSS and multi-sensor information fusion based on train location methods are the research direction in future,which can improve the performance of the train positioning system. Analysis of the requirement of high-speed train positioning, a constructive platform of high-speed train integrated positioning system based on GNSS and multi-sensors information fusion is presented, and its key problems are discussed including reliability, accuracy and integrality,for the high-speed train control process modeling and optimization to explore new ways.