Study on Vertical Dynamics Compensation for Wobbling Effect Mitigation of Electrostatically Levitated Gyroscope

• Published in: International journal of aeronautical and space sciences Vol. 15; no. 3; pp. 293 - 301
• Main Authors: Lee, Jongmin, Song, Hyungmin, Sung, Sangkyung, Kim, Chang Joo, Lee, Sangwoo
• Format: Journal Article
• Language: English
• Published: 한국항공우주학회 01.09.2014
• Subjects: 항공우주공학; levitated gyro-accelerometer; drift rate; moment control; gyroscope; wobbling effect
• ISSN: 2093-274X; 2093-2480
• DOI: 10.5139/IJASS.2014.15.3.293

We present a study of vertical dynamics control of an electrostatically levitated gyro-accelerometer considering the wobblingeffect and propose a tilt stabilization method with newly introduced control electrodes. Typically, a rotor in a vacuum rotatesat high velocity, which may create a drift rate and lead to displacement instability due to the tilt angle of the rotor. To analyzethis, first we set up a vertical dynamic equation and determined simulation results regarding displacement control. Afterderiving an equation for drift dynamics, we analyzed the drift rate of the rotor and the wobbling effect for displacement controlquantitatively. Then, we designed new sub-electrodes for moment control that will decrease the drift amplitude of wobblingdynamics. Finally, a simulation study demonstrated that the vertical displacement control with the wobbling compensationelectrodes mitigated the rotor’s drift rate, showing the effectiveness of the newly proposed control electrodes. KCI Citation Count: 0