薄玻璃壳的横向约束：分段式主动反射镜的需求分析和概念设计
Lateral constraint for thin glass shell: analysis of the requirements and conceptual design for a segmented active mirror
摘要：
用于深空间观测的最新高性能望远镜采用由较小部分制成的非常大的主镜，如JWST采用单片铍六边形部分。这些系统的一个非常有前途的发展阶段是使它们活跃，并在它们的反射表面上操作，以改变它们的形状和补偿像差，以及执行非常精确的对准。这是可能的，通过采用存储致动器的参考体来修改壳体的形状，如在SPLATT项目中使用音圈致动器。然而，由于主体和壳体之间没有物理接触，而且两个主体的物理分离具有许多优点，因此在飞行任务寿命期间，在所有可能影响系统的加速条件下，壳体的固定存在一些问题。本文的目的是研究影响航天器在其寿命期间的加速度环境，并使用它作为一个基线的外壳保持系统的操作要求。本文选择了任何一种方案，为约束系统的发展留下了完全的自由，只是定性地讨论了一些方案。
英文摘要：
The latest high-performance telescopes for deep space observation employ very large primary mirrors that are made of smaller segments, like the JWST which employs monolithic beryllium hexagonal segments. A very promising development stage of these systems is to make them active and to operate on their reflective surfaces to change their shape and compensate for aberrations as well as to perform a very precise alignment. This is possible by employing a reference body that stores actuators to modify the shape of the shell, like in the SPLATT project where voice coil actuators are used. However, the lack of physical contact between the main body and shell places, along with the many advantages related to the physical decoupling of the two bodies, some concerns related to the retaining of the shell under all the possible acceleration conditions affecting the system during the mission lifetime. This paper aims to study the acceleration environment affecting the spacecraft during its lifetime and to use it as a baseline for operational requirements of a retaining system for the shells. Any solution is selected in this paper to leave complete freedom for the development of a constraining system, just some are qualitatively discussed.
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