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Microsystem Technologies

, Volume 20, Issue 2, pp 281–289 | Cite as

Design and analysis of a z-axis tuning fork gyroscope with guided-mechanical coupling

  • Thong Quang Trinh
  • Long Quang Nguyen
  • Dzung Viet Dao
  • Hoang Manh Chu
  • Hung Ngoc Vu
Technical Paper

Abstract

This paper presents design and analysis of a z-axis tuning fork gyroscope. The sensor is designed to reduce noises and improve the sensitivity by using a drive coupling spring in the lozenge shape. The in-phase sensing mode is suppressed by using a self-rotation ring. The designed sensor prioritizes anti-phase driving and sensing modes. The frequencies of anti-phase driving and sensing modes are far from those of parasitic ones. The design also enables the sensing mode to decouple from the driving one, which is considered to decrease vibration-induced error. The proposed sensor structure is analyzed by finite element method. The simulated frequencies of the driving and sensing modes are 9.9 and 10.0 kHz, respectively, which show the bandwidth of sensor of 100 Hz. The frequency difference between the driving and sensing modes and the parasitic ones is obtained to be 50 %. The optimized gap between electrodes leads to the determination of the number of the sensing capacitor fingers and consequently the suitable dimension parameters of the whole device. The sensor performance in the time domain and the frequency domain having the transient response to a given rotation rate is also simulated showing the linear dependence of capacitance change on angular velocity. As a result, the sensitivity of the sensor is evaluated to be 11 fF/°/s.

Keywords

Coriolis Force Capacitance Change Proof Mass Mass Frame Parasitic Mode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work is supported by the Ministry of Science and Technology (MOST), Vietnam as the project of NAFOSTED coded 103.02-2010.23.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Institute of Engineering PhysicsHanoi University of Science and TechnologyHanoiVietnam
  2. 2.International Training Institute for Materials Science (ITIMS)Hanoi University of Science and TechnologyHanoiVietnam
  3. 3.Engineering and Information Technology, Griffith School of EngineeringGriffith UniversityBrisbaneAustralia

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