[1] Xia Guoming, Yang Bo, Wang Shourong,. New digital drive phase control for improving bias stabilityof silicon MEMS gyroscope [J]. Journal of Southeast University (English Edition), 2011, 27 (1): 47-51. [doi:10.3969/j.issn.1003-7985.2011.01.010]

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New digital drive phase control for improving bias stabilityof silicon MEMS gyroscope()

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

Volumn:

27

Issue:

2011 1

Page:

47-51

Research Field:

Instrument Science and Technology

Publishing date:

2011-03-30

Info

Title:

New digital drive phase control for improving bias stabilityof silicon MEMS gyroscope

Author(s):

Xia Guoming;  Yang Bo;  Wang Shourong

Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology of Ministry of Education, Southeast University, Nanjing 210096, China

Keywords:

silicon micro-electro mechanical system(MEMS)gyroscope;  bias drift;  drive phase control;  field-programmable gate array(FPGA)

PACS:

U666.123

DOI:

10.3969/j.issn.1003-7985.2011.01.010

Abstract:

In order to improve the bias stability of the micro-electro mechanical system(MEMS)gyroscope and reduce the impact on the bias from environmental temperature, a digital signal processing method is described for improving the accuracy of the drive phase in the gyroscope drive mode. Through the principle of bias signal generation, it can be concluded that the deviation of the drive phase is the main factor affecting the bias stability. To fulfill the purpose of precise drive phase control, a digital signal processing circuit based on the field-programmable gate array(FPGA)with the phase-lock closed-loop control method is described and a demodulation method for phase error suppression is given. Compared with the analog circuit, the bias drift is largely reduced in the new digital circuit and the bias stability is improved from 60 to 19 °/h. The new digital control method can greatly increase the drive phase accuracy, and thus improve the bias stability.

References:

[1] George T. Overview of MEMS/NEMS technology development for space applications at NASA/JPL[C]//Proceedings of SPIE: Smart Sensors, Actuators, and MEMS. Maspalomas, Gran Canaria, Spain, 2003: 136-148.
[2] Brabour N, Schmidt G. Inertial sensor technology trends[J]. IEEE Sensors Journal, 2001, 1(4):332-339.
[3] Raman J, Cretu E, Rombouts P, et al. A closed-loop digitally controlled MEMS gyroscope with unconstrained sigma-delta force-feedback[J]. IEEE Sensors Journal, 2009, 9(3):297-305.
[4] Keymeulen D, Peay C, Food D, et al. Control of MEMS disc resonance gyroscope using a FPGA platform[C]//2008 IEEE Aerospace Conference. Big Sky, MT, USA, 2008:1-8.
[5] Yang Bo. Research on silicon micro gyroscope measurement and control technology [D]. Nanjing: School of Instrument Science and Engineering of Southeast University, 2007.(in Chinese)
[6] Palomaki K, Niittylahti J, Renfors M. Numerical sine and cosine synthesis using a complex multiplier[C]//Proc of IEEE International Symposium on Circuits and Systems. Orlando, FL, USA, 1999: 356-359.
[7] Zhou Wenwen, Zhang Rong, Zhou Bin. Drive loop design of single axis gyroscope based on SOPC[J]. Journal of Chinese Inertial Technology, 2009, 17(1):67-70.(in Chinese)
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Memo

Memo:

Biographies: Xia Guoming(1983—), male, graduate; Wang Shourong(corresponding author), male, doctor, professor, srwang@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.60974116), the Research Fund of Aeronautics Science(No.20090869007), Specialized Research Fund for the Doctoral Program of Higher Education(No.200802861063).
Citation: Xia Guoming, Yang Bo, Wang Shourong. New digital drive phase control for improving bias stability of silicon MEMS gyroscope[J].Journal of Southeast University(English Edition), 2011, 27(1):47-51.[doi:10.3969/j.issn.1003-7985.2011.01.010]

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