| Issue |
J. Phys. IV France
Volume 128, September 2005
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|---|---|---|
| Page(s) | 201 - 205 | |
| DOI | https://doi.org/10.1051/jp4:2005128030 | |
J. Phys. IV France 128 (2005) 201-205
DOI: 10.1051/jp4:2005128030
Interest of using piezoelectric single crystals with high electromechanical coupling factor in Coriolis Vibrating Gyros
A. Parent, S. Masson and O. Le TraonONERA, Physics, Instrumentation and Sensing Department, Sensors and Microtechnology Unit, BP. 72, 29 avenue de la Division Leclerc, 92322 Châtillon Cedex, France
Abstract
In piezoelectric Coriolis Vibrating Gyros
piezoelectricity is both used to excite the in plane reference vibration and
to detect the out of plane vibration induced by an input angular rate.
Quartz crystal is used because of its good mechanical properties (e.g. high
quality factor... ). In this paper, the opportunity of using new
piezoelectric crystals with high electromechanical coupling factor is
studied. An analytical model of a piezoelectric beam CVG has been
established in the case of high piezoelectric coupling. This model predicts
an improvement by a factor 50 of the gyro resolution by using the
ferroelectric single crystal PMN-0.34PT instead of quartz.
© EDP Sciences 2005