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首页> 外文会议>3rd AIAA spacecraft structures conference 2016 >Precision High-Strain Composite Hinges for the Deployable In-Space Coherent Imaging Telescope
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Precision High-Strain Composite Hinges for the Deployable In-Space Coherent Imaging Telescope

机译：适用于可展开空间相干成像望远镜的精密高应变复合铰链

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摘要

The Deployable In-Space Coherent Imaging Telescope (DISCIT) research effort seeks to develop a 0.7-meter diameter deployable sparse-aperture primary-mirror telescope that leverages recent advances in mirror phasing and deployable structure technologies. A system such as DISCIT could provide affordable, high-resolution, persistent space-based imaging. A key challenge with deploying telescope segments would be the precision required for the location of each component relative to the other components. DISCIT seeks to address this in two ways. First, the primary mirror segments are deployed and initially positioned using flexible composite hinges that can achieve piston- and axial-position repeatability to within 10 μm and tip- and tilt-angle repeatability to within 100 μrad. Second, the mirror segments are then phased using closed-loop image-based alignment via three degree-of-freedom piezo actuators located between each composite hinge and its primary mirror segment. Therefore, the composite hinge only needs position and angle repeatability within the capture range of the piezo actuator. This paper focuses on the development of the flexible composite hinges used to deploy the primary mirror segments, including measurements of the position and angle repeatability and deployment dynamics of candidate hinges.
机译：可展开的空间相干成像望远镜（DISCIT）的研究工作旨在开发直径为0.7米的可展开的稀疏孔径主镜望远镜，该镜利用了镜相定相和可展开结构技术的最新进展。诸如DISCIT之类的系统可以提供负担得起的高分辨率，持久的基于空间的成像。部署望远镜段的主要挑战是每个组件相对于其他组件的位置所需的精度。 DISCIT试图以两种方式解决这个问题。首先，使用柔性复合铰链展开主镜段并进行初始定位，这些铰链可以实现10微米以内的活塞和轴向位置重复性以及100弧度以内的顶角和倾斜角重复性。其次，然后通过位于每个复合铰链与其主镜段之间的三个自由度压电致动器，使用基于闭环图像的对齐方式对镜段进行定相。因此，复合铰链仅需要在压电致动器的捕获范围内的位置和角度可重复性。本文重点研究用于部署主镜段的柔性复合铰链的开发，包括位置和角度重复性的测量以及候选铰链的部署动态。

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