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随着城市人口的不断增加,城市交通问题日益突出。地铁、轻轨具备客运量大、污染少等特点,是解决大中城市交通问题的首选方案。目前,我国各大中城市不断增加地铁的运营里程。由于地铁列车运行密度高、车站间距近、安全性要求高,列车自动控制系统及列车本身需要实时了解列车在线路中的精确位置和速度,那么如何对列车进行精确的定位和速度控制便显得尤为重要。
With the continuous increase of urban population, the problem of urban transportation has become increasingly prominent. Subway, light rail with large passenger volume, less pollution and other characteristics, is to solve the traffic medium and large cities the preferred program. At present, the major metro cities in our country are constantly increasing the mileage of the MTR. Because of the high density of subway trains, the close distance between stations and the high safety requirements, the train automatic control system and the trains themselves need to know the exact position and speed of the trains in line in real time. Therefore, how to accurately locate and control the trains is especially significant important.