• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 17 Issue 5
Oct.  2004
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Article Contents
ZHANGJie, CHENChun-jun, LINJian-hui. Track Irregularity Analysis Based on Wavelet Transform[J]. Journal of Southwest Jiaotong University, 2004, 17(5): 469-471.
Citation: ZHANGJie, CHENChun-jun, LINJian-hui. Track Irregularity Analysis Based on Wavelet Transform[J]. Journal of Southwest Jiaotong University, 2004, 17(5): 469-471.

Track Irregularity Analysis Based on Wavelet Transform

  • Publish Date: 25 Oct 2004
  • To eliminate the disturbances from the speed-instability of the measurement vehicle on the collected track irregularity spectrum, Haar wavelet transform was used to analyze the instantaneous frequencies of the track irregularity signals. The relationship between the instantaneous frequencies of the track irregularity signals and the Haar wavelet coefficients was established to calculate the instantaneous frequencies. The calculated instantaneous frequencies are used for interpolation to get the re-sampled signals, which are then Fourier-transformed to get disturbance-free frequency spectrum.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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