Computer Science – Performance
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jspro..31.1092l&link_type=abstract
Journal of Spacecraft and Rockets (ISSN 0022-4650), vol. 31, no. 6, p. 1092-1098
Computer Science
Performance
Deformation, Lunar Based Equipment, Lunar Observatories, Mirrors, Spaceborne Telescopes, Structural Design, Temperature Effects, Ultraviolet Telescopes, Distortion, Finite Element Method, Flexing, Heat Transfer Coefficients, Silicon Carbides, Supports
Scientific paper
Structural design and analysis of the optical systems for lunar-based telescopes is a challenging task. A driving concern of the Lunar Ultraviolet Telescope Experiment (LUTE) preliminary design study was the degradation of the LUTE optical figure due to thermal deformations, during a temperature cycle of 65 to 265 K at the reference 40 deg latitude, 0 deg longitude landing site. In addressing this task, temperature effects were characterized, and primary-mirror thermal deformations calculated for use in the optical analyses. Trade studies evaluated the qualitative performance of various design schemes. Results indicated that statically determinate mirror supports with bottom-mounted flexures created less optical disturbance under thermal loading than mirror supports at the inner or outer periphery. Another trade indicated that a telescope's baseplate must be athermalized with respect to the mirrors by matching thermal distortion coefficients. A comparison of three materials for the primary mirror predicted that silicon carbide would be the best material for resisting thermally induced figure deformations on the moon.
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