2C33 Estimation Method of Vertical Track Irregularity Using Independent Component Analysis : Experimental review using an actual bogie
Hiroki Nakamura, Kimihiko Nakano, Masanori Ohori · The Proceedings of the Symposium on the Motion and Vibration Control · 2010
This research introduces a method to estimate vertical track irregularity from accelerations of the bogie using ICA (Independent Component Analysis) and examines the performance through the experiment using test track and an actual bogie. The authors propose to apply ICA to monitor the railway system. It is a method to identify the signal sources from the multi data sets of the mixed signals. The vertical accelerations of bogie frame at several points are measured, and the velocities and the displacements at those points are calculated by integrating and double integrating the measured accelerations, respectively. They are treated as parts of the observed data sets as well as the accelerations. By using ICA, the vibration of front and rear wheels are separated. From this result it is expected to separate some disturbance mixed to the track irregularity such as bias of wheels.