Propellantless precision formation flying with photonic laser thrusters for large space telescopes
Propellantless precision formation flying with photonic laser thrusters for large space telescopes
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DOI：
10.1117/12.824485
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发表时间：
2009-08
影响因子：
5.7
通讯作者：
Y. Bae
中科院分区：
文献类型：
--
作者：
Y. Bae
建造大型（直径> 10米）空间望远镜的一种经济和技术上可行的基础结构是分段或稀疏孔径系统，其子部件用于精确编队飞行。对于紫外/可见/红外系统，初始瞄准和瞄准新物体以建立初始条纹需要定位精度达到纳米- μm精度，因此控制系统应能够进行所需的精确定位和姿态控制，而不会产生推力器排气羽流的污染。提出了一种基于光子激光推力器（PLT）和系绳的纳米级无污染编队结构--光子系绳编队飞行（PTFF），利用PLT推力和系绳张力形成的力平衡，形成适合于大型紫外/可见/红外空间望远镜的精确持久三维编队结构。PLT力的范围理论上可以延伸超过几公里。在以前的NASA赞助下，我们已经成功地展示了概念验证PLT。此外，在军事激光应用下开发的所需激光部件、光学和跟踪技术的演示现在证明，大型空间望远镜的PLT的实施离现实又近了一步。
One economically and technologically feasible bedrock structure for constructing large (diameter > 10 m) space telescopes is a segmented or sparse aperture system with subcomponents in precision formation flight. For UV/Visible/IR systems, initial targeting and targeting new objects to establish initial fringes requires the positioning precision to nm - μm accuracy, thus the control system should be capable of the required precision positioning and attitude controls without producing contaminations from thruster exhaust plumes. A nanometer accuracy contaminationfree formation architecture, Photon Tether Formation Flight (PTFF), based on Photonic Laser Thrusters (PLTs) and tethers has been proposed to exploit a force equilibrium formed by PLT thrust and tether tension for forming precision persistent 3-D formation structures ideal for the large UV/Visible/IR space telescopes. The range of the PLT force can theoretically extend over several kms. Under previous NASA sponsorship, we have successfully demonstrated a proofof- concept PLT. In addition, the demonstrations of required laser components, optics and tracking technologies developed under military laser applications now support that implementation of PLTs for large space telescopes is one step closer to reality.