Microdynamics of a precision deployable optical truss

Details Microdynamics of a precision deployable optical truss Microdynamics of a precision deployable optical truss

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3785....2h&link_type=abstract

Proc. SPIE Vol. 3785, p. 2-13, Advanced Telescope Design, Fabrication, and Control, William Roybal; Ed.

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This paper presents the results of an experimental study of the nanometer-level mechanics of a precision deployable structure. The test article is a single bay of a deployable truss, which has both a high structural efficiency (stiffness to mass ratio), and high packaging efficiency. Illustrative data are presented which assess the suitability of the test article for use as an optical support structure, or optical bench. The results show new and unusual microdynamics, namely viscoelasticity and harmonic distortion. However, the structure otherwise exhibits an elastic, stable response within the nanometer-level resolution of the test apparatus. These results are the first experimental evidence that a high efficiency, joint dominated deployable structure might be suitable for optical applications. To the extent this supposition holds true for other structures, these results may have significant implications for the architecture of planned deployable optical spacecraft missions.

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