[1] Wang Qi, Xu Xiaosu,. Application of wavelet package filteringin the de-noising of fiber optic gyroscopes [J]. Journal of Southeast University (English Edition), 2008, 24 (1): 46-49. [doi:10.3969/j.issn.1003-7985.2008.01.011]

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Application of wavelet package filteringin the de-noising of fiber optic gyroscopes()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

24

Issue:

2008 1

Page:

46-49

Research Field:

Automation

Publishing date:

2008-03-30

Info

Title:

Application of wavelet package filteringin the de-noising of fiber optic gyroscopes

Author(s):

Wang Qi;  Xu Xiaosu

School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China

Keywords:

wavelet package analysis;  signal processing;  fiber optic gyro;  threshold filtering

PACS:

TP206+.1

DOI:

10.3969/j.issn.1003-7985.2008.01.011

Abstract:

To reduce the drift error existing in the output signal of fiber optic gyroscopes(FOG), a mathematical model of the FOG output signal is set up; the error characteristics of the FOG output signal are analyzed, and semi-soft threshold filtering is chosen based on the comparison of hard threshold and soft threshold filtering. The semi-soft threshold wavelet package filtering method is applied in the filtering of the FOG output signal. Experiments of the stationary and dynamic FOG output signals filtered with the wavelet package analysis are carried out in a lab environment, respectively. Experiments done with the real-time measured FOG signal show that the method of semi-soft threshold wavelet package filtering reduces the mean square error from 5(°)/h to 1(°)/h, so it is effective in eliminating the white noises and the fractal noises existing in the FOG. The novel method proposed here is proved valid in reducing the FOG drift error, satisfying the technical demands of high precision and real-time processing.

References:

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Memo

Memo:

Biographies: Wang Qi(1981—), male, graduate;Xu Xiaosu(corresponding author), male, doctor, professor, xxs@seu.edu.cn.
Foundation items: Pre-Research Program of General Armament Department during the 11th Five-Year Plan Period(No.51309020503), the National Defense Basic Research Program of China(973 Program)(No.973-61334), the National Natural Science Foundation of China(No.50575042), Specialized Research Fund for the Doctoral Program of Higher Education(No.20050286026).
Citation: Wang Qi, Xu Xiaosu.Application of wavelet package filtering in the de-noising of fiber optic gyroscopes[J].Journal of Southeast University(English Edition), 2008, 24(1):46-49.

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