摘要
空间碎片的不断增加给人类航天活动的开展和在轨资产的安全造成严重威胁。在已经提出的多种空间碎片主动清除方式中,绳系拖曳(tethered space-tug,TST)系统因有较好的应用前景而受到广泛关注。部分失效航天器因星上器件损坏且姿态控制系统异常,始终将姿态维持在某一特定指向,针对此类具有典型的非合作特征的大型空间碎片,开展绳系拖曳动力学与控制研究。将拖船和目标均视作刚体,用牛顿法建立了TST系统的动力学模型;根据目标姿态稳定方式分为自旋稳定和三轴稳定两种情况,开展了绳系拖曳动力学分析与控制设计,并考察了系绳在失效航天器表面连接点位置对系统稳定状态的影响。仿真结果表明,拖船和失效航天器会在系绳连接下表现出抗衡特点,最终系统会稳定在不同的均衡状态附近。此研究为安全清除尚有残余姿态控制能力的失效航天器中相关拖曳动力学与控制问题提供了参考。
The number of space debris is increasing rapidly which poses severe safety threats to the development of human space activities and in-orbit assets.Among the various proposed active debris removal techniques,tethered space-tug(TST)system has received increasing attention in recent years for its promising application prospects.Some defunct satellites keep specific orientations due to the damage of on-board components and attitude control systems.A dynamics and control study of tethered satellite system during the deorbiting phase was carried out for this special type of large space debris with non-cooperative characteristics.A mathematical model of TST system including two satellites modeled as rigid bodies was developed using Newton laws.According to the different attitude stabilization methods,the emphasis was the spin stabilized satellites and three-axis stabilized satellites.The control laws of the tug and debris were designed respectively and the influence of the positions of attachment points on debris was also studied.The simulation results indicate that the system will stabilize near an equilibrium state after the countermeasure between the tug and debris.
作者
孙瑞琦
祁瑞
SUN Ruiqi;QI Rui(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《中国空间科学技术》
CSCD
北大核心
2021年第6期42-53,共12页
Chinese Space Science and Technology
基金
上海航天控制技术研究所委托课题(201920141209A)。
关键词
空间碎片
非合作目标
绳系拖曳系统
四元数
自旋稳定
三轴稳定
space debris
tethered space-tug
quaternion
spin stabilized satellites
three-axis stabilized satellites
作者简介
孙瑞琦(1996-),女,硕士研究生,研究方向为空间碎片绳系拖曳,ruiqibit@163.com;通信作者:祁瑞(1985-),男,副教授,研究方向为航天器动力学与控制,E-mail:qirui@bit.edu.cn。
