Extraction of Runyang bridge vibration information based on a fusion method of wavelet threshold denoising and EMD decomposition

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (12) : 264-270.

YU Teng1, HU Wusheng2, WU Jie1, LI Haifeng3, QIAO Yan1

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Abstract

The data of dynamic vibration monitoring of the Runyang bridge, a large-span bridge, are large and complex, In order to better filter out noise and obtain real vibration information, a method of wavelet denoising and EMD decomposition was proposed.At first the signal was decomposed with the wavelet method, and then noise was filtered out with an improved threshold function.The signal was decomposed after the wavelet threshold de-noising using the EMD method.Finally the signal was refactored.Example analysis shows that the method can filter out noise more effectively and extract the bridge vibration information.

Key words

wavelet / threshold function / EMD decomposition / bridge vibration / de-noising

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YU Teng1, HU Wusheng2, WU Jie1, LI Haifeng3, QIAO Yan1. Extraction of Runyang bridge vibration information based on a fusion method of wavelet threshold denoising and EMD decomposition[J]. Journal of Vibration and Shock, 2019, 38(12): 264-270

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