Jpn. J. Appl. Phys. 36 (1997) pp. 3037-3040  |Next Article|  |Table of Contents|
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Finite Element Method Analysis of Single Crystal Tuning Fork Gyroscope for Suppression of its Inner Leakage Coupling

Noboru Wakatsuki and Hiroshi Tanaka

(Received November 8, 1996; accepted for publication February 6, 1997)

To suppress the null signals in a LiTaO₃ crystal fork gyroscope, we analyzed the fork's vibration modes using the finite element method (FEM) and proposed adding a slit to the base of the fork. In the base with a slit, the movement of the f_x mode is very low level but the symmetrical motion is the same as of the arm for the f_z mode. Therefore, we can place a detecting electrode where the driving mode is negligible. Since the slit also improves the mechanical balance for the f_z mode and suppresses a precessional motion, the mechanical coupling decreases to less than 1/10.

KEYWORDS: piezoelectric vibratory gyroscope, angular rate sensor, leakage coupling, fork resonator, finite element method
URL: http://jjap.ipap.jp/link?JJAP/36/3037/
DOI: 10.1143/JJAP.36.3037

References | Citing Articles (7)

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