Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : December 17, 2020 - December 18, 2020
In recent years, there has been a need to improve satellite communications services and develop the satellite communications business. In addition, the sophistication of satellite missions is increasing. As a result, there is a need to develop satellites with high accuracy and large aperture antennas. For this reason, cable-mesh antennas have been developed. The cable-mesh antenna consists of a metal mesh, a cable network and a support structure. However, the surface accuracy of the metal mesh is reduced due to deformation called pillow deformation. In addition, the tension of the mesh shifts the nodes and reduces the accuracy of the mirror surface. The design of cable mesh antennas includes sag insertion geometry to improve shape stability and an offset parabolic model to maintain a large diameter. In this study, we focus on sag and offset parabolas to investigate the effect of cable mesh tension on the cable network mesh tension. The results show that the sag ratio degrades the surface accuracy the most due to the relationship between cable tension and facet size. It was also found that the mirror surface accuracy tended to deteriorate as the offset angle increased. Therefore, it is necessary to set the appropriate sag ratio for the center and offset parabola.
