@misc{oai:jaxa.repo.nii.ac.jp:00003353,
 author = {野崎, 健太 and 壹岐, 賢太郎 and 河本, 聡美 and 森野, 美樹 and Nozaki, Kenta and Iki, Kentaro and Kawamoto, Satomi and Morino, Yoshiki},
 month = {Mar},
 note = {第7回スペースデブリワークショップ (2016年10月18-20日. 宇宙航空研究開発機構調布航空宇宙センター(JAXA)(CAC)), 調布市, 東京, The 7th Space Debris Workshop (October 18-20, 2016. Chofu Aerospace Center, Japan Aerospace Exploration Agency (JAXA)(CAC)), Chofu, Tokyo, Japan, 宇宙航空研究開発機構(JAXA)ではデブリ除去用導電性テザー(EDT)の研究が進められている. 大型デブリ除去に必要な推力を確保するため, 数km級テザーの伸展が必要とされる. この際, 重力傾斜やコリオリ力の影響で伸展速度や面内振動が増大し, 最終的にテザー耐荷重を超える張力により破断する可能性がある. 本研究では, これに対し, 被覆無しの導電性テザーおよび、比較的重量の重い300kg級の衛星による長距離伸展を想定し, 軌道上で、実績のあるバーバーポールブレーキの導入検討を目的とした. まず, 地上伸展試験により, 自己潤滑性および低固着性をもつPTFEをポール材とし, ブレーキ力のモデル化を行った. 次に, 地上試験によるモデルを反映させ, 数値シミュレーションによる軌道上テザー伸展予測を行った。これにより, 面内振動±10degおよび最大張力70N以下に軽減することができ, 伸展中における本ブレーキ導入の有用性を示した., The Japan Aerospace Exploration Agency (JAXA) has been investigating Electrodynamic Tether (EDT) systems for de-orbiting existing debris. EDT is a high-efficiency propulsion system to generate Lorentz force by the interaction with the Earth's magnetic field. It is necessary to deploy a several kilometer tether in order to obtain sufficient thrust for large debris removal. In the deployment phase, excess of deployment velocity and in-plane libration by gravity gradient become issues, since the behavior of the tether becomes unstable or it is severed by the tension over in excess of the load limit. In some previous flight experiments, a barber pole brake was adapted as a simple brake to acquire effective braking force. However, the barber pole brake was applied for tether deployment with a non-conductive tether and a light satellite up to some tens of kilograms. The purpose of this study is to build a simple barber pole brake using a net-type bare conductive tether and a relatively heavy satellite of about several hundred kilograms. First, a braking force model is built based on on-ground tests with a high-sensitive sensor. Next, numerical simulations about tether deployment dynamics on orbit are performed in order to investigate its applicable limitation. In the numerical simulations using the brake model from the on-ground tests, a 10-km-long tether is deployed, and the changes in the form of the tether and the tether oscillations are also calculated. The simulation confirmed that the barber pole brake can decrease the in-plane libration angle to less than ±10 deg, and the maximum tension up to the half value of the tether load limit 160N., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1630052045, レポート番号: JAXA-SP-16-011},
 title = {Evaluation of a barber pole brake in deployment of conductive tether for debris removal},
 year = {2017}
}