Analysis of Loss Mechanisms in Hemispherical Shell of Vibratory Gyroscopes

Authors

  • Shailesh Kumar Research Centre Imarat, RCI Hyderabad and Physics Department , IIT Hyderabad
  • Runa Debnath Research Centre Imarat, RCI, Hyderabad
  • Amit Kumar Chaurasiya Research Centre Imarat, RCI, Hyderabad
  • Sumit Kumar Yadav Research Centre Imarat, RCI, Hyderabad

DOI:

https://doi.org/10.29284/gb73ep30

Keywords:

Hemispherical Shell; flexural vibration; q-factor; resonant frequency.

Abstract

CVG (Coriolis Vibratory Gyroscope) is one kind of sensor in inertial sensors technology for navigation applications in aerospace field. Different factors effecting Q-factor of hemispherical shell are analyzed. Different loss mechanisms are studied and ways to reduce them are presented in this paper. The precessional phenomenon and vibration characteristics of hemispherical resonator shell are investigated in this paper. Thin shell theory and virtual displacement principle are employed to model hemispherical shell. The influence of shell’s geometry parameters on its natural frequency and precessional rate is analyzed. ANSYS-finite element analyzer, is used to analyze the influence of shell’s geometry, physical parameters on optimal Q-factor.

References

[1] D.M.Rozelle, “The Hemispherical Resonator : From wine glass to planets” AAS 09-176.

[2] A.Mathews,F.J.Rybak, “Comparision of Hemispherical Resonator Gyro and Optical Gyro”, IEE AES Magazine,vol.5,pp.40-45,1992.

[3] D.D.Lynch, “Vibration-Induced Drift in the Hemispherical Resonator Gyro”, Proc.Inst. of NAV, 23-25June1987, Dayton, Ohio.

[4] E.J. Loper and D.D.Lynch, “Projected System Performance Based on Recent HRG Test Results”, Proc.IEEE/AIAA 5th Digital Avionics System Conference,Seatle,WA,October 31,1983.

[5] Chan-Shin Chou, “ Modal Precession of a Hemispherical Shell Gyro Excited by Electrostatic Field”, “International Journal of Applied Electromagnetics & Mechanics”,1383-5416,October 1,1999.

[6] E.A.Izmailov,M.M.Kolesnic,A.M.Osipov, “Hemispherical Resonator Gyro Technology Problems and Possible ways of their solutions”,RTO MP-43.pp.3-6,May 1999.

[7] Zeyan xu, Weidong Zhu,Guoxing Yi, Wei Fan, “ Dynamic modelling and output error analysis of an imperfect hemisphericall shell resonator”, 498

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Published

2026-02-10

Issue

Vol. 12 No. 2s (2026)

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

This work is licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

How to Cite

[1]
S. Kumar, R. Debnath, A. K. Chaurasiya, and S. K. Yadav, “Analysis of Loss Mechanisms in Hemispherical Shell of Vibratory Gyroscopes”, IJASIS, pp. 1779–1787, Feb. 2026, doi: 10.29284/gb73ep30.

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