Study on the Method of Vibration Signal De-Noising Using Wavelet Packet Based on QPSO

Abstract:

Although many wavelet de-noising methods have been studied and proposed, the parameters of them are obtained by experience mostly, which makes the de-noising effect instable. To solve the issues, the solutions, such as the selection of wavelet function and threshold function, the calculation of decomposition levels, the optimal wavelet packet basis and the thresholds obtained based on QPSO, have been studied in this paper. Every parameter is obtained by calculation. This method is applied to the de-noising experiment of sine and vibration signals. Through the experimental verification, the effect of this de-noising method is obvious.

• Periodical: Applied Mechanics and Materials (Volumes 599-601)
• Pages: 1738-1744
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.599-601.1738
• Online since: August 2014
• Authors: Kai Zhao*, Ben Wei Li, Jing Chen
• Keywords: De-Noising Method, QPSO, Vibration Signal, Wavelet Packet

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