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Proceedings Paper

Development of sunshield structures for large space telescopes
Author(s): John D. Johnston; Brian D. Ross; Joe Blandino; Jon Lawrence; Charles M. Perrygo
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Paper Abstract

Future large aperture infrared space telescopes such as the Next Generation Space Telescope will require lightweight, deployable sunshields to enable passive radiative cooling to cryogenic operating temperatures. In addition to the requirement for a high performance thermal design, mechanical and structural requirements are also demanding due to constraints on mass and volume. NASA has supported several technology development efforts to reduce risks in the area of sunshield structures, including: system packaging and deployment, film management, materials characterization, modeling tools for thin-film membranes, and ground test capabilities for characterizing structural performance. This paper discusses recent progress in sunshield structures technology development relating to post-deployment structural performance. First, improved approaches for analyzing partially wrinkled, thin-film membrane structures will be discussed. Next, new techniques for static and dynamic testing of ultra-lightweight structures will be described. Finally, analytical and experimental results from two recent studies will be described: (a) dynamic characterization of a 1/10th scale sunshield model and (b) static shape characterization of a 1/20th scale sunshield membrane layer. Results from these studies will provide valuable resources for use in design of sunshields for future space telescopes.

Paper Details

Date Published: 5 March 2003
PDF: 12 pages
Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); doi: 10.1117/12.461249
Show Author Affiliations
John D. Johnston, NASA Goddard Space Flight Ctr. (United States)
Brian D. Ross, NASA Goddard Space Flight Ctr. (United States)
Joe Blandino, James Madison Univ. (United States)
Jon Lawrence, NASA Goddard Space Flight Ctr. (United States)
Charles M. Perrygo, Swales Aerospace (United States)

Published in SPIE Proceedings Vol. 4850:
IR Space Telescopes and Instruments
John C. Mather, Editor(s)

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