Abstract
High accuracy and large torque actuators are needed for the agile satellite. Magnetically Suspended Control Moment Gyroscope (MSCMG) has these characters. In addition, it has the advantages of long-life, micro-vibration and non-lubricate, and then is an ideal actuator for agile satellite. However, the stability of the rotor in magnetic bearing and the precision of output torque are affected by the fast slew of satellite and the rotational gimbals. This paper is aimed to meet the demand of the agile small satellite maneuver and attitude control by using two parallel mounted small SGMSCMGs. The effect of whether using limited torque, limited gimbals rate, and the attitude control period on the displacement of rotor and the precision of output torque are analyzed. Simulation results are given to show that, the pitch axis of the satellite has the ability to rotate fifty degrees in ten seconds without destroying the rotor stability.
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