Volume 35 Issue 4
Apr.  2010
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WU Jizhong, HUA Xianghong, GAO Junqiang. Feature Extraction of Structure Natural Vibration and Multipath Separation Based on Wavelet Packet Decomposition[J]. Geomatics and Information Science of Wuhan University, 2010, 35(4): 486-490.
Citation: WU Jizhong, HUA Xianghong, GAO Junqiang. Feature Extraction of Structure Natural Vibration and Multipath Separation Based on Wavelet Packet Decomposition[J]. Geomatics and Information Science of Wuhan University, 2010, 35(4): 486-490.
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Feature Extraction of Structure Natural Vibration and Multipath Separation Based on Wavelet Packet Decomposition

  • 1School of Geodesy and Geomatics, Wuhan University,129 Luoyu Road, Wuhan 430079, China;2College of Civil Engineering, Nanjing University of Technology, 200 North Zhongshan Road, Nanjing 210009, China

Funds: 国家863计划资助项目(2007AA12E345)
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  • Received Date: February 19, 2010
  • Revised Date: February 19, 2010
  • Published Date: April 04, 2010
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    • Abstract
  • Multipath is the dominant error source in the structural vibration monitoring using GPS. In order to obtain the characteristics of structure natural vibration accurately, both the frequency characteristics of the multipath and the structural vibration are analyzed, then wavelet packet decomposition is employed to extract specifical components in different scales and spectral analysis is adopted for frequency characteristic analysis. Experimental results show that the wavelet packet can be used to separate multipah error and extract the vibration feature effectively. In addition, the actual vibration frequency obtained using GPS conforms its theoretical value and it has high stability.
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