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A Basic Study of High-accuracy Piezoelectric Vibrator Gyroscopes of Hybrid Type

Research Project

Project/Area Number 05650236
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Dynamics/Control
Research InstitutionOkayama University

Principal Investigator

KAGAWA Yukio  Okayama University, Department of Electrical and Electonic Engineering, Professor, 工学部, 教授 (10019200)

Co-Investigator(Kenkyū-buntansha) TSUCHIYA Takao  Okayama University, Department of Electrical and Electonic Engineering, Lecturer, 工学部, 講師 (20217334)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1994: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
KeywordsPiezoelectric Gyroscope / Finite Element Method / Mode Separation / Degenerate Mode / Monolithic Type Gyroscope
Research Abstract

The use of the finite element approach is proposed for the characteristic prediction of piezoelectric vibrator gyroscopes. The finite element formulation including the effect of Coriolis force due to rotation is given for a piezoelectric thin plate in plane vibration, which is considered to be of a two-dimensional model. Using the program developed, the electric input admittance, the modal shapes, the change of the transmission characteristic of the output voltage due to rotation are demonstrated for three types of configuration. The development of monolithic type gyroscopes are kept in mind.
The following could be deduced from the analysis :
1) The proper of Coriolis force is clearly represented in the finite element formulation for the gyroscopes.
2) The vibratory frequency must be chosen as low as possible for high sensitivity to rotation.
3) The degenerated modes separate into the upper and lower mode due to the rotation.
4) The mode separation affects the electric input admittance and the output voltage.
5) The gyroscopes must be driven at the degenerated mode for high performance.
6) The simulated results show that the monolithic configurations are promising for sensitive detection of rotation and the use of these modes is possibly advantageous as the effect of the temperature change on the frequency change could be canceled to improve the temperature stability. The temperature characteristic is an important factor, and the effect can easily be incorporated in the program.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (1 results)

All Other

All Publications (1 results)

  • [Publications] 加川幸雄: "圧電ジャイロのための有限要素法解析" 電子情報通信学会技術報告超音波研究会. US93. 47-54 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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