Vibration suppression effect of translational motion control for asymmetric flexible satellite

Abstract

As a case of asymmetric satellite with flexible appendages, it is known that there exists coupled vibration between rotational motion and translational motion via flexible appendages which make satellite asymmetric. Hereby, when an asymmetric satellite rotates, elastic vibration excited by control input of rotational motion may, more or less, be transmitted to translational motion. Therefore, suppression of such an excited vibration of translational motion can, in turn, suppress the elastic vibration, and herewith attitude maneuver with little excitation of elastic modes can be expected. From the reason mentioned above, in this paper, we propose translational motion control system using proof-mass actuators and co-located accelerometers for asymmetric satellite. Then, translational motion control law with consideration of actuator saturation was studied. The proposed translational motion control system was verified through numerical simulations. Finally, feasibility of the proposed method was discussed.