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Article

Automatic Mode-Matching Method for MEMS Disk Resonator Gyroscopes Based on Virtual Coriolis Force

by 1,2, 1,2, 1,2, 1,2 and 1,2,*
1
School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
2
Key Laboratory of Micro-Inertial Instruments and Advanced Navigation Technology, Ministry of Education, Nanjing 210096, China
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(2), 210; https://doi.org/10.3390/mi11020210
Received: 18 January 2020 / Revised: 13 February 2020 / Accepted: 14 February 2020 / Published: 18 February 2020
An automatic mode-matching method for MEMS (Micro-electromechanical Systems) disk resonator gyroscopes (DRGs) based on virtual Coriolis force is presented in this paper. For this mode-matching method, the additional tuning electrodes are not required to be designed, which simplifies the structure design. By using the quadratic relationship between the driving voltage and the electrostatic force, the virtual Coriolis force is obtained by applying an AC voltage whose frequency is half of the driving mode resonant frequency to the sense electrode. The phase difference between the virtual Coriolis force and the sense output signal is used for mode-matching. The structural characteristics and electrode distribution of the DRG are briefly introduced. Moreover, the mode-matching theories of the DRG are studied in detail. The scheme of the mode-matching control system is proposed. Simultaneously, the feasibility and effectiveness of the mode-matching method are verified by system simulation. The experimental results show that under the control of mode-matching at room temperature, the bias instability is reduced from 30.7575 ° /h to 2.8331 ° /h, and the Angle Random Walk (ARW) decreases from 1.0208 ° / h to 0.0524 ° / h . Compared with the mode mismatch condition, the ARW is improved by 19.48 times. View Full-Text
Keywords: MEMS (Micro-electromechanical Systems) disk resonator gyroscope; frequency split; virtual Coriolis force; electrostatic negative stiffness effect; mode-matching MEMS (Micro-electromechanical Systems) disk resonator gyroscope; frequency split; virtual Coriolis force; electrostatic negative stiffness effect; mode-matching
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MDPI and ACS Style

Ruan, Z.; Ding, X.; Qin, Z.; Jia, J.; Li, H. Automatic Mode-Matching Method for MEMS Disk Resonator Gyroscopes Based on Virtual Coriolis Force. Micromachines 2020, 11, 210. https://doi.org/10.3390/mi11020210

AMA Style

Ruan Z, Ding X, Qin Z, Jia J, Li H. Automatic Mode-Matching Method for MEMS Disk Resonator Gyroscopes Based on Virtual Coriolis Force. Micromachines. 2020; 11(2):210. https://doi.org/10.3390/mi11020210

Chicago/Turabian Style

Ruan, Zhihu, Xukai Ding, Zhengcheng Qin, Jia Jia, and Hongsheng Li. 2020. "Automatic Mode-Matching Method for MEMS Disk Resonator Gyroscopes Based on Virtual Coriolis Force" Micromachines 11, no. 2: 210. https://doi.org/10.3390/mi11020210

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