|Table of Contents|

[1] Wang Xiaolei, Li Hongsheng, Yang Bo,. Design and implementation of digital closed-loopdrive control system of a MEMS gyroscope [J]. Journal of Southeast University (English Edition), 2012, 28 (1): 35-40. [doi:10.3969/j.issn.1003-7985.2012.01.007]
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Design and implementation of digital closed-loopdrive control system of a MEMS gyroscope()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
28
Issue:
2012 1
Page:
35-40
Research Field:
Instrument Science and Technology
Publishing date:
2012-03-30

Info

Title:
Design and implementation of digital closed-loopdrive control system of a MEMS gyroscope
Author(s):
Wang Xiaolei Li Hongsheng Yang Bo
School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology of Ministry of Education, Southeast University, Nanjing 210096, China
Keywords:
micro electromechanical system(MEMS)digital gyroscope drive frequency phase-locked loop(PLL) oscillating amplitude automatic gain control(AGC)
PACS:
U666.123
DOI:
10.3969/j.issn.1003-7985.2012.01.007
Abstract:
In order to effectively control the working state of the gyroscope in drive mode, the drive characteristics of the micro electromechanical system(MEMS)gyroscope are analyzed in principle. A novel drive circuit for the MEMS gyroscope in digital closed-loop control is proposed, which utilizes a digital phase-locked loop(PLL)in frequency control and an automatic gain control(AGC)method in amplitude control. A digital processing circuit with a field programmable gate array(FPGA)is designed and the experiments are carried out. The results indicate that when the temperature changes, the drive frequency can automatically track the resonant frequency of gyroscope in drive mode and that of the oscillating amplitude holds at a set value. And at room temperature, the relative deviation of the drive frequency is 0.624×10-6 and the oscillating amplitude is 8.0×10-6, which are 0.094% and 18.39% of the analog control program, respectively. Therefore, the control solution of the digital PLL in frequency and the AGC in amplitude is feasible.

References:

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Memo

Memo:
Biographies: Wang Xiaolei(1980—), male, graduate; Li Hongsheng(corresponding author), male, doctor, professor, hsli@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.200902861063).
Citation: Wang Xiaolei, Li Hongsheng, Yang Bo.Design and implementation of digital closed-loop drive control system of a MEMS gyroscope[J].Journal of Southeast University(English Edition), 2012, 28(1):35-40.[doi:10.3969/j.issn.1003-7985.2012.01.007]
Last Update: 2012-03-20