Abstract
Gyroscopes operating along a single axis are widely developed and are currently batch-fabricated. Several applications which require three-dimensional (3D) motion have necessitated the need for a detailed study of a 3D vibratory gyroscope. We consider a functionally graded plate gyroscope (FGPG) with an arbitrary number of sections supported by means of a rigid stem at the center. The system vibrates both in- and out-of-plane. We derive the equations of motion for the system and show that a slow 3D inertial rotation rate of the gyroscope can be calculated approximately in terms of amplitudes of vibration. These amplitudes should be experimentally determinable. The in- and out-of-plane vibrations are excited respectively with different circumferential wave numbers. To realise a 3D vibrational gyroscope, the in- and out-of-plane eigenvalues are tuned by means of the variation of radial and/or axial lengths. To better understand the ordinary differential equations (ODE’s) modeling this system, we introduced an averaging operator. Numerical examples are included for two concentric components of the FGPG, where the inner component is made from an aluminum alloy and the outer component is made from a titanium alloy. Frequency spectra diagrams of tuned in- and out-of-plane vibrations are plotted. Diagrams of normalised eigenfunctions for both in- and out-of-plane vibrations are plotted.
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This material is based upon work supported financially by the Tshwane University of Technology (TUT). Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors, and TUT therefore does not accept any liability in regard thereto.
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The work was financially supported by the Tshwane University of Technology.
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Sedebo, G., Shatalov, M.Y., Joubert, S.V. et al. The Dynamics of a Three-Dimensional Tuning Functionally Graded Plate Gyroscope. Mech. Solids 57, 1577–1589 (2022). https://doi.org/10.3103/S0025654422060267
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DOI: https://doi.org/10.3103/S0025654422060267