Design Of A Support System For The Primary Mirror Of A Cryogenic Space Telescope

Robert DiTolla; Ralph M. Richard; Daniel Vukobratovich

doi:10.1117/12.966651

18 July 1986 Design Of A Support System For The Primary Mirror Of A Cryogenic Space Telescope

Robert DiTolla, Ralph M. Richard, Daniel Vukobratovich

Proceedings Volume 0619, Cryogenic Optical Systems and Instruments II; (1986) https://doi.org/10.1117/12.966651
Event: O-E/LASE'86 Symposium, 1986, Los Angeles, CA, United States

Abstract

The finite element method was used for the structural design of the Space Infrared Telescope Facility (SIRTF) primary mirror and its support system in a cryogenic environment similar to space-shuttle cargo-bay launch conditions. Shuttle loads were specified by power spectral density functions (PSDF) obtained from previous shuttle launches. The primary goal in the development of a design to withstand this random loading was to ensure the structural integrity of the support system, which comprised an aluminum baseplate and three titanium flexures. This design was an extension of a support system previously developed for cryogenic static effects only. The displacements and stresses of the support system are greatly affected by the damping characteristics of the flexures, which are very difficult to quantify. A parametric study illustrates the behavior of the system over the range of the estimated damping values. Recommendations and techniques for modeling this type of structure are presented. The methods and approaches used in the analysis and the effect of model refinement upon solution accuracy are discussed.

Citation Download Citation

Robert DiTolla, Ralph M. Richard, and Daniel Vukobratovich "Design Of A Support System For The Primary Mirror Of A Cryogenic Space Telescope", Proc. SPIE 0619, Cryogenic Optical Systems and Instruments II, (18 July 1986); https://doi.org/10.1117/12.966651

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