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    Volume 50, Issue 1 (May 2021)

    Cross-Term Suppression Method for Time-Frequency Spectrum of Engineering Blasting Signals

    (Received 8 February 2021; accepted 19 March 2021)

    Published Online: 25 May 2021

    CODEN: JTEVAB

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    Abstract

    Engineering blasting vibration signals are affected by the test environment and contain noise and trend components, which leads to significant cross-term in the time-frequency (TF) distribution. To address these problems, a combined algorithm of matching pursuit (MP) and smooth pseudo-Wigner-Ville distribution (SPWVD) is proposed to suppress the TF spectrum cross-term and extract the signal features. An overcomplete atom library is constructed for signal feature matching according to sparse signal representation theory. Atomic reconstruction of the subsignal is achieved by MP decomposition, and the SPWVD distribution of the reconstructed subsignal is calculated and superimposed, yielding a more accurate TF expression of the blasting signal. The results show that the combined MP-SPWVD method can accurately suppress cross-term and improve the TF identification and feature analysis ability, which verifies the accuracy of its application in signal TF analysis. The combined algorithm is thus suitable for TF feature extraction of engineering blasting signals.

    Author Information:

    Fu, Xiaoqiang
    Fujian Research Center for Tunneling and Urban Underground Space Engineering, Huaqiao University, Xiamen, Fujian

    Department of Architecture and Civil Engineering, Sanming University, Sanming, Fujian

    Sanming Coffer Fine Chemical Industrial Co., Ltd., Sanming, Fujian

    Yu, Jin
    Fujian Research Center for Tunneling and Urban Underground Space Engineering, Huaqiao University, Xiamen, Fujian

    Dai, Liangyu
    Sanming Coffer Fine Chemical Industrial Co., Ltd., Sanming, Fujian

    Liu, Jifeng
    Department of Architecture and Civil Engineering, Sanming University, Sanming, Fujian

    Huang, Jianguo
    China Railway 12th Bureau Group No. 4 Engineering Co., Ltd., Xi’an, Shaanxi

    Ren, Wenbin
    China Railway 12th Bureau Group No. 4 Engineering Co., Ltd., Xi’an, Shaanxi


    Stock #: JTE20210094

    ISSN:0090-3973

    DOI: 10.1520/JTE20210094

    Author
    Title Cross-Term Suppression Method for Time-Frequency Spectrum of Engineering Blasting Signals
    Symposium ,
    Committee E11