6 September 2017 Dynamic/jitter assessment of multiple potential HabEx structural designs
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Abstract
One of the driving structural requirements of the Habitable Exo-Planet (HabEx) telescope is to maintain Line Of Sight (LOS) stability between the Primary Mirror (PM) and Secondary Mirror (SM) of ≤ 5 milli-arc seconds (mas). Dynamic analyses of two configurations of a proposed HabEx 4 meter off-axis telescope structure were performed to predict effects of a vibration input on primary/secondary mirror alignment. The dynamic disturbance used as the forcing function was the James Webb Space Telescope reaction wheel assembly vibration emission specification level. The objective of these analyses was to predict “order-of-magnitude” performance for various structural configurations which contribute to efforts in defining the HabEx structural design’s global architecture. Two variations of the basic architectural design were analyzed. Relative motion between the PM and the SM for each design configuration are reported.
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J. Brent Knight, H. Philip Stahl, Andy Singleton, Ron Hunt, Melissa Therrell, Kate Caldwell, Jay Garcia, Mike Baysinger, "Dynamic/jitter assessment of multiple potential HabEx structural designs", Proc. SPIE 10374, Optical Modeling and Performance Predictions IX, 1037402 (6 September 2017); doi: 10.1117/12.2274325; https://doi.org/10.1117/12.2274325
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