圆柱壳体振动陀螺谐振结构微质量扰动仿真研究

Frequency split and mode shape drift are main factors affecting the quality of Cylinder Shell Vibrating Gyroscope (CSVG). How to diminish the value of them is of great significance for application of CSVG . In this paper, based on the detailed analysis of the cause of structural errors of CSVG, we find the laws that how micro quality disturbances of slotting and reaming affect on vibration performance of CSVG though studying the slotting on top of CSVG and reaming on bottom of CSVG by finite element method; Using these laws, we design a modification scheme to diminish the value of frequency split and mode shape drift of CSVG ,and confirm the high quality of the modified model through harmonic response analysis under piezoelectric effect. The result indicates the modification scheme is feasible and effective.