JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2011, Vol. 41 ›› Issue (3): 62-66.
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MU Shigang, FENG Xianying*, YAN Zhiwen, YANG Jingfang
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Abstract:
The unbalanced signal is periodic and carries intense background noise. In view of these characteristics, a de-noising method using a multilevel threshold based on the analysis of the autocorrelation of detailed coefficients was proposed. This method uses the discrete wavelet transform technique to decompose the signal into approximations and details.The autocorrelation sequences of the detailed coefficients were determined.According to whether the sequence reflects the autocorrelation of white noise, the threshold was determined.The results of experiments and the application in practical dynamic balancing measurement system indicate the presented method was fit to apply in dynamic balancing measurement, which satisfies the requirement of high precision.
Key words: dynamic balancing, wavelet transform;autocorrelation sequence, multi-level threshold
MU Shigang, FENG Xianying*, YAN Zhiwen, YANG Jingfang. Study on unbalanced signal extraction from a dynamic balancing machine based on wavelet analysis[J].JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2011, 41(3): 62-66.
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