摘要：AbstractModern Earth observation spacecrafts require high agility to maneuver with larger torque which eventually needs CMGs, as Reaction Wheels cannot meet the demand of such large torques. In order to obtain high-accuracy pointing control with CMG, extremely precise gimbal control is necessary. The current paper brings to light the degree of control precision achieved by gimbal control system with the high fidelity models of inaccuracies like Gimbal Friction, CMG Motor Ripple, structural compliance which hinder the level of accuracy obtainable from CMG attitude control. Proper compensation schemes based on the models help in facilitating an improved level of precision control with CMG. Simulations are carried out with periodic sinusoids as reference gimbal rate to 4 Single Gimbal Control Moment Gyros with roof-top configuration in MATLAB/SIMULINK.
