衛星のスピン軸方向に伸展する超軽量アンテナの簡易モデル化と動的挙動に関する検討

摘要

The model of an observation antenna rod that is produced and developed can be extend by a storing state in the spin axialdirection of the magnetosphere observation mission satellite. It is usually known as SPINAR (Space Inflatable ActuatedRod), and it is the combination of an inflatable tube and a lightweight CFRP rod. For extending CFRP rod, SPINAR usesthe inflatable tube as an actuator. In this study, the simplified model is created by considering the non-isotopic stiffness,spin, and extension of the super lightweight antenna that is used in micro-gravity environment. From this model, thedynamic behavior and stable extension is examined by using the formulation of tip trace analysis that considered theextension of tangential direction inertia and the bending of pivot point inertia. From the result of numerical analysisunder the same condition as the extension experiment that is held in micro-gravity condition in an airplane, we know thateven if there was an offset before the extension, the SPINAR gathered at spin center and can be extended stably at theextension speed of 2.2m per 5.2second.(0.423[m/s]). Because of the sudden change of the momentum when extensionwas finished and the agitation from a plane, the result of numerical analysis is partly different from the result of realextension experiment, but by using this simple model, the stable extension speed, acceleration, and rotational rate can bedistinguished at the initial design stage.