Measurement method and simulation for azimuth angle of normal-mode axis of hemispherical resonator
ZHU Beibei1, CHU Jianning2, QIN Lin1, WANG Yixin2, CHEN Xiao2, WANG Xuefang2, XU Jianfeng2
1.Shanghai Aerospace Control Technology Institute, Shanghai 201109, China;
2.School of Mechanical Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract：The Measurement of hemispherical resonator normal-mode axis azimuth is basic for its fabrication and adjustment. Firstly, determination method of the normal-mode axis azimuth was theoretically analyzed. Secondly, based on position excitation, harmonic response simulation of the hemispherical resonator was carried out, measurement process of the normal-mode axis azimuth was simulated. Finally, experimental scheme was designed, normal-mode of hemispherical resonator is excited by the non-contact acoustic excitation, vibration signals at different positions of the lip edge are collected by laser Doppler vibrometer. Angular resolution of the method is better than 1°. The experimental results show that the measurement error of the azimuth angle is about 4.4%. The method is feasible, simple and easy to operate. It is significant for research of improving the hemispherical resonator’s performance.
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