关键词: 高速铁路, 列车定位, 应答器, 速度平均法, 最小二乘法

Abstract: As the operation speed is constantly improving, the train operation control system has highly requirement on the accuracy of train’s location. The train will carry out a location check when passing through a position transponder, which makes location error become zero. However, the location error will increase as the train went away from the nearest relevant transponder. In order to solve this problem, this paper establishes a mathematical model on calculation of train’s location at first. Then, location estimation model of high-speed railway based on average speed method or least squares method are built. Finally, it validates the two models by use of measured data from Wuhan - Guangzhou high-speed railway. The results show that least squares model can halve the location error and estimate the train location better comparing with average speed method.

Key words: high-speed train, train location, transponder, average speed method, least-square method