Dynamic Characteristics of Vertically Coupled Structures and the Design of a Decoupled Micro Gyroscope

Sensors

Bumkyoo Choi¹  Seung-Yop Lee²  Taekhyun Kim² 

[1] id="af1-sensors-08-03706">Department of Mechanical Engineering Sogang University / #1 Shinsu-dong, Mapo-gu, Seoul 121-742, Kor

关键词: vibratory gyroscope;    coupled motion;    vibration analysis;   

DOI  :  10.3390/s8063706

来源: mdpi

【 摘 要 】

In a vertical type, vibratory gyroscope, the coupled motion between reference (driving) and sensing vibrations causes the zero-point output, which is the unwanted sensing vibration without angular velocity. This structural coupling leads to an inherent discrepancy between the natural frequencies of the reference and the sensing oscillations, causing curve veering in frequency loci. The coupled motion deteriorates sensing performance and dynamic stability. In this paper, the dynamic characteristics associated with the coupling phenomenon are theoretically analyzed. The effects of reference frequency and coupling factor on the rotational direction and amplitude of elliptic oscillation are determined. Based on the analytical studies on the coupling effects, we propose and fabricate a vertically decoupled vibratory gyroscope with the frequency matching.

【 授权许可】

CC BY   
© 2008 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.