Analysis on Track Characteristic Irregularity Based on Wavelet and Wigner-Hough Transform

Time-frequency analysis on track irregularity and accurate extraction of detrimental wavelengths causing car-body excitation are of great importance to the repair and maintenance of railway lines.This paper proposed the automatic extraction algorithm of track irregularity characteristic(detrimental) wavelengths:At first,acquiring adaptively the track irregularity and car-body vibration signals in all frequency bands with the DWT(Discrete Wavelet Transform) method,and then analyzing the(cross) Wigner-Ville time-frequency energies for the signals;using the HT(Hough Transform) to further suppress the cross distracters;deriving the formula for extracting track irregularity characteristic(detrimental) wavelengths lastly.The track inspection data of the Shuo-Huang Heavy Haul Railway from 2011.07 to 2012.10 were checked,showing that the automatic extraction algorithm was correct.The statistical values of the track irregularity characteristic wavelengths of the Shuo-Huang Railway are of reference to operating management and maintenance of heavy haul railway in our country.