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Proceedings Paper

Mechanical and thermal disturbances of the PSR moderate focus-mission structure
Author(s): Choon-Foo Shih; Michael C. Lou
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Paper Abstract

The primary objective of this paper is to evaluate the optical pointing performance of the PSR Moderate Focus-Mission Structure when subjected to both mechanical and thermal disturbances. The mechanical disturbances are based on secondary mirror chopping. Results indicate that dynamic responses of the primary reflector and the secondary reflector subjected to chopping disturbances of the secondary reflector about its center of mass are within the figure maintenance control capabilities. The effects of modal damping, truss-type secondary support, interface boundary constraints, and alternate configurations, are also evaluated in the analysis. Thermal distortions of the structure were also evaluated based on the on-orbit temperature profiles derived from the submillimeter telescope missions. Results from thermal deformation analysis indicate that figure initialization control is needed for the PSR Moderate Focus-Mission. However, a figure maintenance system may not be required if adequate thermal isolation is incorporated into the support truss design for the PSR Moderate Focus-Mission Structure.

Paper Details

Date Published: 1 December 1991
PDF: 10 pages
Proc. SPIE 1532, Analysis of Optical Structures, (1 December 1991); doi: 10.1117/12.48257
Show Author Affiliations
Choon-Foo Shih, Jet Propulsion Lab. (United States)
Michael C. Lou, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 1532:
Analysis of Optical Structures
Donald C. O'Shea, Editor(s)

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