Recent Patents on Computer Science

Hamid Mcheick  
Computer Science Department
University of Quebec at Chicoutimi
Chicoutimi, Quebec


Wavelet Packet Basis Optimal Selection in Compressing Vibration Signals of a Gearbox

Author(s): Hao WENG and Jinji GAO

Affiliation: Diagnosis and Self-recovery Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China.


In this paper, a compression algorithm of gearbox vibration signal combining wavelet packet transform is proposed. The effects of wavelet packet transform are also introduced and several main attributes of wavelet basis are analysed. Based on the description and discussion, a method to select wavelet basis of the compressing gearbox vibration signal is proposed. The paper represents a review of some recent patents regarding vibration signals. Experiment shows that, better SNRs of reconstruction signal can be obtained by using wavelet basis with low vanishing moment. Among those wavelet basis with low vanishing moment, the best signal-to-noise ratio in the same compression ratio can be obtained by using ‘coif’ wavelet basis because of its best symmetry.

Keywords: Compressing vibration signals, gearbox, wavelet packet basis, wavelet packet transform.

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Article Details

Page: [218 - 226]
Pages: 9
DOI: 10.2174/22132759113069990010