Satellite Rotation Modulation Measurement System Based on Ultrasonic Motor

Rotation modulation technique is generally used to improve the performance of aviation and marine inertial navigation system. Considering of the performance requirements from current aerospace to MEMS micro-nano inertial device, this paper proposedrotary inertial device modulation technology application methods on the satellite.Firstly, taking the advantage ofultrasonic motor, like high resolution, fast response, electromagnetic compatibility, a lowmagnetic, high-precision and appropriate for use on satellite ultrasonic motor modulation turntable was developed. Then, through theoretical modeling and simulations,the rotation modulation technology was verified to improvethe precise of satellite attitude measurementeffectively, equivalent toimprove the accuracy of MEMS gyro over an order of magnitude. This work helpsachieve the application of rotation modulation technology in aerospace and acceleratethe promotion of the MEMS gyro in satellite attitude measurement.