Research on Screening the Longitudinal Level Irregularity of Middle and Low Speed Maglev Track

The gap between the maglev and track is kept consistent, when it runs. The longitudinal level irregularity hidden in the track has an impact on the stability of the train. To screen the condition, the multidimensional data about the maglev, which is saved in the train black box and includes speed, gap, acceleration, current, sampling time and so on, is analyzed. It's huge but sparse, selected form equal time intervals and of high duplication. Therefore, it is intelligently split into pieces based on the data of speed and sampling time. The longitudinal level irregularity can be filtered by basing on the collaborative filtering and the multidimensional data.