Design of a flexure mount for optics in dynamic and cryogenic environments
AuthorPollard, Lloyd Wayne, 1936-
KeywordsLens mounts -- Design and construction.
Orbiting astronomical observatories -- Design and construction.
Astronomical instruments -- Design and construction.
Infrared telescopes -- Design and construction.
AdvisorRichard, Ralph M.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractThe design of the flexure mount recently submitted to NASA Ames for the structural support of the primary mirror of the Space Infrared Telescope Facility (SIRTF) is presented. The flexure system must passively accommodate the differential thermal contraction between the glass mirror and the aluminum structure of the telescope during cryogenic cooldown. Further, it must support the one meter diameter, 116 kilogram (258 pound) primary mirror during a severe launch to orbit. Procedures used to establish the required radial compliance using computer programs NASTRAN and FRINGE are discussed. The parametric design program developed to study early concepts is presented. Methods of combining modal responses resulting from a displacement response spectrum analysis are discussed, and a combination scheme called MRSS, Modified Root of Sum of Squares, is presented. Modal combination schemes using MRSS, SRSS, and ABS are compared to the results of a Modal Frequency Response analysis.
Degree ProgramGraduate College
Civil Engineering and Engineering Mechanics
Degree GrantorUniversity of Arizona
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