Application of Wavelet Transform in the De-Noising of Angular Displacement Signals of Crank Rocker Mechanism

Article Preview

Abstract:

In order to get rid of noise from the angular displacement of the crank rocker mechanism, the wavelet transform method is introduced. After the noise corresponds to the high frequency band of wavelet domain of the signal and the signal corresponds to the low frequency band of wavelet domain of the signal, the signal is decomposed into four layers, and the high frequency brand is set zero. The test results show that this method was most ideal for the de-noising effect on displacement signals, which is able to not only retain valid signals but to effectively remove the noise.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

1062-1065

Citation:

Online since:

November 2014

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2014 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] Chen, J., et al., Construction of customized redundant multiwavelet via increasing multiplicity for fault detection of rotating machinery. Mechanical Systems and Signal Processing, 2014. 42(1): pp.206-224.

DOI: 10.1016/j.ymssp.2013.08.024

Google Scholar

[2] Solís, M., M. Algaba and P. Galvín, Continuous wavelet analysis of mode shapes differences for damage detection. Mechanical Systems and Signal Processing, 2013. 40(2): pp.645-666.

DOI: 10.1016/j.ymssp.2013.06.006

Google Scholar

[3] Klepka, A. and T. Uhl, Identification of modal parameters of non-stationary systems with the use of wavelet based adaptive filtering. Mechanical Systems and Signal Processing, (2013).

DOI: 10.1016/j.ymssp.2013.09.001

Google Scholar

[4] Yan, G., et al., Structural damage detection using residual forces based on wavelet transform. Mechanical Systems and Signal Processing, 2010. 24(1): pp.224-239.

DOI: 10.1016/j.ymssp.2009.05.013

Google Scholar

[5] Wang, Y., Z. He and Y. Zi, Enhancement of signal denoising and multiple fault signatures detecting in rotating machinery using dual-tree complex wavelet transform. Mechanical Systems and Signal Processing, 2010. 24(1): pp.119-137.

DOI: 10.1016/j.ymssp.2009.06.015

Google Scholar

[6] Bayissa, W.L., N. Haritos and S. Thelandersson, Vibration-based structural damage identification using wavelet transform. Mechanical Systems and Signal Processing, 2008. 22(5): pp.1194-1215.

DOI: 10.1016/j.ymssp.2007.11.001

Google Scholar

[7] Zhong, S. and S.O. Oyadiji, Crack detection in simply supported beams without baseline modal parameters by stationary wavelet transform. Mechanical Systems and Signal Processing, 2007. 21(4): pp.1853-1884.

DOI: 10.1016/j.ymssp.2006.07.007

Google Scholar

[8] Schukin, E.L., R.U. Zamaraev and L.I. Schukin, The optimisation of wavelet transform for the impulse analysis in vibration signals. Mechanical systems and signal processing, 2004. 18(6): pp.1315-1333.

DOI: 10.1016/j.ymssp.2004.01.008

Google Scholar