Application of FDM with Adaptive Energy Distribution Improvement in Blasting Vibration Signal Noise Reduction
In order to solve the problem of reduced efficiency caused by excessive decom-position in the non-dominant interval when analyzing and processing blasting vibration sig-nals using Fourier Decomposition Method(FDM),according to the characteristic that the energy distribution of this type of signal is mainly concentrated in low frequency,an FDM blasting vibration signal decomposition method with adaptive energy characteristics is pro-posed and compared with Wavelet Transform(WT),Empirical Mode Decomposition(EMD)and FDM decomposition methods.The results show that the improved FDM de-composition method can find the best advantage frequency interval according to the energy distribution of the signal,greatly reducing the meaningless components caused by over-de-composition,and effectively improving the signal decomposition efficiency;compared with the WT,EMD and FDM decomposition methods,this method has a higher signal-to-noise ratio and a lower root mean square difference.It can effectively reduce the signal recon-struction error while retaining the time-frequency characteristics of the blasting vibration signal.
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