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LST secondary mirror articulation mechanismThe analysis, design, manufacture, test, and delivery of one secondary mirror articulation mechanism for the large space telescope (LST) are reported. The mechanism provides angular freedom about two axes that are perpendicular to the optical axis of the secondary mirror. Motion in each axis is controlled from two sources; one source provides alignment, the other source provides stabilization. Two articulation mechanism configurations were evaluated. In one configuration the stabilization system was assembled with piezoelectric actuators. In the second configuration the stabilization system utilized flexure torque motor actuators. The alignment system was the same for both configurations. System testing confirmed performance that met or exceeded all operational requirements. The two types of stabilization actuators had different performance characteristics. Both types demonstrated position resolution and frequency response better than specified limits.
Document ID
19740019763
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Date Acquired
September 3, 2013
Publication Date
May 1, 1974
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-CR-120237
REPT-11923
Accession Number
74N27876
Funding Number(s)
CONTRACT_GRANT: NAS8-29723
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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