Time-frequency Analysis of Track Irregularity Based on Orthogonal Empirical Mode Decomposition

Ling Zhao, Darong Huang, Honggang Wang, Hongtao Yu, Xiaoyan Chu
2016 TELKOMNIKA (Telecommunication Computing Electronics and Control)  
A method of extracting transient features of a non-stationary signal was proposed based on the combination of orthogonal empirical mode decomposition (OEMD) and the Hilbert transform. After obtaining orthogonal intrinsic mode functions, the instantaneous frequency and amplitude can be calculated, so problems existing in the original Hilbert-Huang Transform (HHT) method, such as mode aliasing, can be solved. The track irregularity signal is studied with the OEMD method, and the statistical and
more » ... alytic result indicates that there are relatively serious short wave and long wave track irregularities in the sample signal. Analysis of track irregularities using OEMD is a new technical method for guaranteeing the safe running of railway.
doi:10.12928/telkomnika.v14i3a.4400 fatcat:6m2lxr73n5f2vgm4aybunm2bqm