THREE DIMENSIONAL RIGID BALL ACTUATION SYSTEM FOR SPACECRAFT ATTITUDE CONTROL

摘要

The present invention relates to a three dimensional sphere actuating system for controlling the attitude of a satellite, comprising: a support frame (10) having a polyhedral shape; a sphere (20) positioned at the inner center of the support frame (10); a plurality of ball bearings (30) installed at the inner corners of the support frame (10) and being in contact with the surface of the sphere (20); a plurality of electromagnets (40) arranged at the periphery of the ball bearings and forming a magnetic field to rotate the sphere (20); and a controller (50) for the rotational direction and the rotational speed of the sphere (20) by controlling the electromagnets (40). The present invention need not install a magnetic levitation apparatus for levitating the sphere in the air by making the ball bearings support the sphere installed within a satellite attitude control apparatus and additionally, can precisely control the attitude of the satellite by maintaining a position of the sphere against vibration, and so on.