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Sensors 2011, 11(8), 7665-7677; doi:10.3390/s110807665

A Study of the Temperature Characteristics of Vibration Mode Axes for Vibratory Cylinder Gyroscopes

1
Department of Mechatronics Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China
2
Wuhan Ordnance N.C.O. Academy, Wuhan, 430075, China
*
Author to whom correspondence should be addressed.
Received: 8 June 2011 / Revised: 26 July 2011 / Accepted: 28 July 2011 / Published: 4 August 2011
(This article belongs to the Section Physical Sensors)
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Abstract

The zero bias stability, which is an important performance parameter for vibratory cylinder gyroscopes, is high sensitive to temperature change. It is considered that the varying temperature makes the vibration mode axes unstable, which has significant influence on the zero bias stability. This paper will investigate this problem in detail. First, the relationships between the angular positions of vibration mode axes and the zero bias are analyzed. Secondly, the thermal-modal model of the cylinder resonator with several defects such as mass imbalance, frequency split (FS), and geometry errors are developed by ANSYS. Simulation results show that with the increase of temperature, angular positions of the vibration mode axes obviously change, which leads to a dramatic zero bias drift. Finally, several major influence factors on the angular position stability of vibration mode axes, including frequency split, geometry errors, thermal elastic modulus coefficient (TEMC) and thermal expansion coefficient (TEC) are analyzed in detail. Simulation results in this paper will be helpful for deep understanding of the drift principle of zero bias induced by temperature for vibratory cylinder gyroscopes and also be helpful for further temperature compensation or control. View Full-Text
Keywords: vibratory cylinder gyroscopes; vibration mode axes; zero bias drift; temperature vibratory cylinder gyroscopes; vibration mode axes; zero bias drift; temperature
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wu, Y.; Xi, X.; Tao, Y.; Wu, X.; Wu, X. A Study of the Temperature Characteristics of Vibration Mode Axes for Vibratory Cylinder Gyroscopes. Sensors 2011, 11, 7665-7677.

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