[1] Ji Xunsheng, Wang Shourong, Xu Yishen, et al. Application of fast wavelet transformationin signal processing of MEMS gyroscope [J]. Journal of Southeast University (English Edition), 2006, 22 (4): 510-513. [doi:10.3969/j.issn.1003-7985.2006.04.014]

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Application of fast wavelet transformationin signal processing of MEMS gyroscope()

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

Volumn:

22

Issue:

2006 4

Page:

510-513

Research Field:

Automation

Publishing date:

2006-12-30

Info

Title:

Application of fast wavelet transformationin signal processing of MEMS gyroscope

Author(s):

Ji Xunsheng¹;  2;  Wang Shourong¹;  Xu Yishen¹

¹ School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
² School of Communication & Control, Southern University, Wuxi 214063, China

Keywords:

wavelet transformation;  signal processing;  gyroscope;  threshold

PACS:

TP206+.1

DOI:

10.3969/j.issn.1003-7985.2006.04.014

Abstract:

Decomposition and reconstruction of Mallat fast wavelet transformation(WT)is described.A fast algorithm, which can greatly decrease the processing burden and can be very easy for hardware implementation in real-time, is analyzed.The algorithm will no longer have the processing of decimation and interpolation of usual WT.The formulae of the decomposition and the reconstruction are given.Simulation results of the MEMS(micro-electro mechanical systems)gyroscope drift signal show that the algorithm spends much less processing time to finish the de-noising process than the usual WT.And the de-noising effect is the same.The fast algorithm has been implemented in a TMS320C6713 digital signal processor.The standard variance of the gyroscope static drift signal decreases from 78.435 5(°)/h to 36.763 5(°)/h.It takes 0.014 ms to process all input data and can meet the real-time analysis of signal.

References:

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[3] Yang Fusheng.Technical analysis and the application of the wavelet transformation[M].Beijing:Science Press, 2003.4.(in Chinese)
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[8] Liu Jie, Zhu Qibing, Li Yungong, et al.Signal de-noising research based on new threshold function via dyadic wavelet transform[J].Journal of Northeastern University (Natural Science), 2006, 27(5):536-540.(in Chinese)
[9] Zhang Weiqiang, Song Guoxiang.Signal de-noising in wavelet domain based on a new kind of thresholding function[J].Journal of Xidian University, 2004, 31(2):296-302.(in Chinese)
[10] Chen Gang, Zhang Zhaoxia, Zhuang Liangjie.Application of wavelet domain median filter in gyro north finder[J].Journal of Tianjin University, 2006, 28(7):39-42.(in Chinese)
[11] Fu Qiangwen, Zhang Yingming.Practical method in signal processing of FOG[J].Journal of Transcluction Technology, 2005, 18(1):101-105.(in Chinese)

Memo

Memo:

Biographies: Ji Xunsheng(1969—), male, graduate;Wang Shourong(corresponding author), male, doctor, professor, srwang@seu.edu.cn.

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