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A Mode Matched Triaxial Vibratory Wheel Gyroscope with Fully Decoupled Structure

To avoid the oscillation of four unequal masses seen in previous triaxial linear gyroscopes, a modified silicon triaxial gyroscope with a rotary wheel is presented in this paper. To maintain a large sensitivity and suppress the coupling of different modes, this novel gyroscope structure is designed...

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Detalles Bibliográficos
Autores principales: Xia, Dunzhu, Kong, Lun, Gao, Haiyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4701317/
https://www.ncbi.nlm.nih.gov/pubmed/26593916
http://dx.doi.org/10.3390/s151128979
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author Xia, Dunzhu
Kong, Lun
Gao, Haiyu
author_facet Xia, Dunzhu
Kong, Lun
Gao, Haiyu
author_sort Xia, Dunzhu
collection PubMed
description To avoid the oscillation of four unequal masses seen in previous triaxial linear gyroscopes, a modified silicon triaxial gyroscope with a rotary wheel is presented in this paper. To maintain a large sensitivity and suppress the coupling of different modes, this novel gyroscope structure is designed be perfectly symmetrical with a relatively large size of about 9.8 mm × 9.8 mm. It is available for differentially detecting three-axis angular rates simultaneously. To overcome the coupling between drive and sense modes, numerous necessary frames, beams, and anchors are delicately figured out and properly arranged. Besides, some frequency tuning and feedback mechanisms are addressed in the case of post processing after fabrication. To facilitate mode matched function, a new artificial fish swarm algorithm (AFSA) performed faster than particle swarm optimization (PSO) with a frequency split of 108 Hz. Then, by entrusting the post adjustment of the springs dimensions to the finite element method (FEM) software ANSYS, the final frequency splits can be below 3 Hz. The simulation results demonstrate that the modal frequencies in drive and different sense modes are respectively 8001.1, 8002.6, 8002.8 and 8003.3 Hz. Subsequently, different axis cross coupling effects and scale factors are also analyzed. The simulation results effectively validate the feasibility of the design and relevant theoretical calculation.
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spelling pubmed-47013172016-01-19 A Mode Matched Triaxial Vibratory Wheel Gyroscope with Fully Decoupled Structure Xia, Dunzhu Kong, Lun Gao, Haiyu Sensors (Basel) Article To avoid the oscillation of four unequal masses seen in previous triaxial linear gyroscopes, a modified silicon triaxial gyroscope with a rotary wheel is presented in this paper. To maintain a large sensitivity and suppress the coupling of different modes, this novel gyroscope structure is designed be perfectly symmetrical with a relatively large size of about 9.8 mm × 9.8 mm. It is available for differentially detecting three-axis angular rates simultaneously. To overcome the coupling between drive and sense modes, numerous necessary frames, beams, and anchors are delicately figured out and properly arranged. Besides, some frequency tuning and feedback mechanisms are addressed in the case of post processing after fabrication. To facilitate mode matched function, a new artificial fish swarm algorithm (AFSA) performed faster than particle swarm optimization (PSO) with a frequency split of 108 Hz. Then, by entrusting the post adjustment of the springs dimensions to the finite element method (FEM) software ANSYS, the final frequency splits can be below 3 Hz. The simulation results demonstrate that the modal frequencies in drive and different sense modes are respectively 8001.1, 8002.6, 8002.8 and 8003.3 Hz. Subsequently, different axis cross coupling effects and scale factors are also analyzed. The simulation results effectively validate the feasibility of the design and relevant theoretical calculation. MDPI 2015-11-17 /pmc/articles/PMC4701317/ /pubmed/26593916 http://dx.doi.org/10.3390/s151128979 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xia, Dunzhu
Kong, Lun
Gao, Haiyu
A Mode Matched Triaxial Vibratory Wheel Gyroscope with Fully Decoupled Structure
title A Mode Matched Triaxial Vibratory Wheel Gyroscope with Fully Decoupled Structure
title_full A Mode Matched Triaxial Vibratory Wheel Gyroscope with Fully Decoupled Structure
title_fullStr A Mode Matched Triaxial Vibratory Wheel Gyroscope with Fully Decoupled Structure
title_full_unstemmed A Mode Matched Triaxial Vibratory Wheel Gyroscope with Fully Decoupled Structure
title_short A Mode Matched Triaxial Vibratory Wheel Gyroscope with Fully Decoupled Structure
title_sort mode matched triaxial vibratory wheel gyroscope with fully decoupled structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4701317/
https://www.ncbi.nlm.nih.gov/pubmed/26593916
http://dx.doi.org/10.3390/s151128979
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