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Article Navigation> JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY> 2019> 28(3): 428-436
Qing Li, Wenlong Xu, Di Zhang, Dandan Feng, Na Li. Improved Method and Application of EMD Endpoint Continuation Processing for Blasting Vibration Signals[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2019, 28(3): 428-436. doi: 10.15918/j.jbit1004-0579.18070
Citation: Qing Li, Wenlong Xu, Di Zhang, Dandan Feng, Na Li. Improved Method and Application of EMD Endpoint Continuation Processing for Blasting Vibration Signals[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2019, 28(3): 428-436.doi:10.15918/j.jbit1004-0579.18070
shu

Improved Method and Application of EMD Endpoint Continuation Processing for Blasting Vibration Signals

doi:10.15918/j.jbit1004-0579.18070
  • 1.

    School of Mechanics and Civil Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China

  • 2.

    School of Civil Engineering, Guangzhou University, Guangzhou 510006, China

  • Received Date:2018-04-09
    Abstract
  • In order to deal with the non-stationary characteristics of blasting vibration signals and the end issue in the empirical mode decomposition(EMD), an improved endpoint continuation method is proposed. First, the linear continuation method of extreme points is used to determine the extremum of the signal endpoint fast. Secondly, the extreme points of transition section outside the signal ends are obtained by a mirror continuation method of extreme points, and then the envelope and continuation curve of the transition section of the signal are constructed. Lastly, the sinusoid of the stationary section outside the signal is constructed to achieve the continuation curve from the transition section to the stationary section. Based on the "singular extreme points" phenomenon of blasting vibration signal, the negative maxima and positive minimum are eliminated, then the maximum and minimum are guaranteed to appear at intervals. Thus,the number of iterations is reduced and the instability of EMD decomposition is improved. The calculation formula of amplitude, cycle and initial phase are given for the transition section and stationary section outside the signal. The endpoint processing effect of the simulated signal and the measured blasting vibration signal show that the improved endpoint continuation method can suppress the signal endpoint effect well.
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