Denoising method for blasting vibration signals based on APO-VMD combining wavelet threshold

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (15) : 249-258.

SHOCK AND EXPLOSION

Denoising method for blasting vibration signals based on APO-VMD combining wavelet threshold

LI Hongchao1,2, ZHANG Ji1, SHI Yulian3, HUANG Guoquan4, QU Chenliang5， YI Jiaxin6， WEN Yiming*6

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Abstract

Due to the influence of complex geological conditions in the blasting process, the vibration signal is mixed with a large amount of noise, which covers the real information of the signal to a certain extent. In order to effectively reduce the noise part of blasting vibration signal, a denoising method combining Artificial Protozoa Optimizer (APO), Variational Mode Decomposition (VMD) and wavelet threshold is proposed to obtain the real time domain and frequency domain information of vibration signal. This method uses the APO algorithm to find the intrinsic mode number K and the penalty factor α that make the best VMD decomposition effect. Then, VMD is used to adaptively decompose the noisy signal, and the noisy modal components with small variance contribution rate are eliminated. The retained modal components are subjected to wavelet threshold denoising processing, and finally the reconstructed denoised real signal is obtained. The simulation signal and the field measured blasting vibration signal are used as the initial signals, and the APO-VMD combined wavelet threshold, empirical mode decomposition, wavelet threshold denoising, VMD and other methods are used to denoise them. The results show that the APO-VMD combined wavelet threshold method can effectively remove the noise signal and make it maximally guaranteed.

Key words

Blasting vibration signal / APO / Variational modal decomposition / Denoising

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LI Hongchao1, 2, ZHANG Ji1, SHI Yulian3, HUANG Guoquan4, QU Chenliang5, YI Jiaxin6, WEN Yiming6. Denoising method for blasting vibration signals based on APO-VMD combining wavelet threshold[J]. Journal of Vibration and Shock, 2025, 44(15): 249-258

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