Harmonic wavelet packet transform for on-line system health diagnosis

2004 ◽  
Author(s):  
Ruqiang Yan ◽  
Robert X. Gao
Keyword(s):  
Wavelet Packet ◽  
Wavelet Packet Transform ◽  
Line System ◽  
Harmonic Wavelet ◽  
On Line ◽  
Health Diagnosis

A Detection Method for Friction Vibration Based on Harmonic Wavelet Packet Transform and Cross-Correlation Analysis

2018 ◽  
Vol 140 (3) ◽  
Author(s):  
Pengfei Xing ◽  
Guobin Li ◽  
Ting Liu ◽  
Hongtao Gao ◽  
Guoyou Wang
Keyword(s):  
Steady State ◽  
Correlation Analysis ◽  
Cross Correlation ◽  
Detection Method ◽  
Wavelet Packet ◽  
Wavelet Packet Transform ◽  
Mean Square ◽  
Vibration Signals ◽  
Cross Correlation Analysis ◽  
Harmonic Wavelet

Running-in wear experiments were conducted on a spherical-on-disk tester. The vibration signals collected in the experiments were detected by a combination of harmonic wavelet packet transform (HWPT) and cross-correlation analysis (CCA) methods. Experimental results show that the friction vibration signals detected in tangential and normal directions have the characteristics of no time delay and strong correlation. Their root-mean-square (RMS) values gradually reduce and enter a steady-state of fluctuation with the experiments time, which are consistent with the variation of friction coefficient and reflect the change of wear states from the running-in wear to the stable wear. Therefore, the detection of friction vibration can be realized by a combination of HWPT and CCA methods.

Classification of surface EMG signals using harmonic wavelet packet transform

2006 ◽  
Vol 27 (12) ◽  
pp. 1255-1267 ◽  
Author(s):  
Gang Wang ◽  
Zhiguo Yan ◽  
Xiao Hu ◽  
Hongbo Xie ◽  
Zhizhong Wang
Keyword(s):  
Wavelet Packet ◽  
Surface Emg ◽  
Wavelet Packet Transform ◽  
Harmonic Wavelet

Study of Vibration Characteristics of the Reciprocating Compressor on the Offshore Platform Based on Harmonic Wavelet Packet Transform

2014 ◽  
Vol 875-877 ◽  
pp. 2107-2112
Author(s):  
Ye Hua Huang ◽  
Guo Hua Dai
Keyword(s):  
Wavelet Packet ◽  
Low Frequency ◽  
Vibration Signal ◽  
Axial Direction ◽  
Wavelet Packet Transform ◽  
Vibration Characteristics ◽  
Offshore Platform ◽  
Vibration Energy ◽  
Reciprocating Compressor ◽  
Harmonic Wavelet

In order to determine the vibration characteristics of the reciprocating compressor on the offshore platform, the vibration signal from the reciprocating compressor on the offshore platform was investigated by applying the harmonic wavelet packet transform. The energy variation of vibration signal under the different frequencies was discussed. It was shown that the vibration energy of the reciprocating compressor in the horizontal and vertical directions is mainly concentrated in the low frequency of 25Hz and 50Hz, and the vibration energy of other frequency is small and smooth. In the axial direction, the vibration energy of the reciprocating compressor extends to the medium-high frequency, and the large energy appears in the 225 Hz. Therefore, the harmonic wavelet packet transform can be used to research the vibration characteristics of the reciprocating compressor on the offshore platform.

Mistuning identification in a bladed disk using wavelet packet transform

2017 ◽  
Vol 229 (3) ◽  
pp. 1275-1295 ◽  
Author(s):  
N. Jamia ◽  
P. Rajendran ◽  
S. El-Borgi ◽  
M. I. Friswell
Keyword(s):  
Wavelet Packet ◽  
Wavelet Packet Transform ◽  
Bladed Disk
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