衛星搭載用大形メッシュアンテナ鏡面の形状制御

抄録

This paper describes an on-board shape control technique for large mesh antenna reflectors that compensates the surface errors caused by thermal deformation. Shape control is carried out by displacing the stand-offs to which the cable network is attached. The displacement values are calculated so as to regain the designed parabolic surface. The experimental system consists of a 4m∅ mesh antenna reflector, two theodolites for position measurements and actuators for displacing the stand-offs. The surface error caused by thermal deformation in orbit is assumed and the proposed surface control is applied to compensate this error. The validity of the control method is confirmed by the good agreement of calculated and experimental results. Finally, the antenna patterns are calculated by using experimental data. The effectiveness of the proposed method is confirmed by the restoration of antenna gain.