Analysis of metallic hemispherical shell vibration modes for coriolis vibratory gyroscope

2018 International Joint Conference on Materials Science and Mechanical Engineering

Mittapally, Gopala Krishna Murthy^1 ; Dantala, Dinkar^2 ; Chhabra, I.M.^1 ; Kishore, Putha^2 ; Rao, N.V.N.^1 ; Das, K.C.^1

Research Center Imarat Hyderabad, India^1

National Institute of Technology Warangal, India^2

关键词: Angular motions;    Capacitor location;    Coriolis vibrating gyroscope;    Coriolis vibratory gyroscopes;    Hemispherical shells;    Parallel plate capacitors;    Vibration modes;    Vibration pattern;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/383/1/012022/pdf
DOI  :  10.1088/1757-899X/383/1/012022

来源: IOP

【 摘 要 】

Gyroscope is an instrument widely used in the navigation systems for sensing inertial angular motion. One of the principle of Gyroscope is Coriolis Vibrating Gyroscope (CVG), which is simple and easy to operate. It is realized during the development of the CVG that it is most suitable inertial sensor for aerospace applications. In this paper, a novel method for high reliable gyroscope application is demonstrated to verify the 'Mode 2' vibration pattern of vibrating hemispherical metallic shell. A parallel plate capacitor arrangement is made by placing discrete metallic plates around the metallic shell to study the vibration mode pattern. The shell vibrating at this particular mode, flexes along the axial direction of capacitor. The air gap of the parallel plate capacitor changes as the shell vibrates. The 'Mode 2' vibration pattern from the shell is confirmed by studying the phase relation at different capacitor locations.