Mechanical and thermal disturbances of the PSR Moderate Focus-Mission Structure

Details Mechanical and thermal disturbances of the PSR Moderate Focus-Mission Structure Mechanical and thermal disturbances of the PSR Moderate Focus-Mission Structure

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1532...81s&link_type=abstract

In: Analysis of optical structures; Proceedings of the Meeting, San Diego, CA, July 23, 24, 1991 (A93-38415 15-37), p. 81-90.

Astronomy and Astrophysics

Astronomy

Mirrors, Modal Response, Reflectors, Spaceborne Astronomy, Thermal Stability, Structural Stability, Submillimeter Waves, Transient Response, Trusses

Scientific paper

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.

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