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1 August 1990 Dynamics and control performance of a very large telescopic structure
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Proceedings Volume 1271, Adaptive Optics and Optical Structures; (1990)
Event: The International Congress on Optical Science and Engineering, 1990, The Hague, Netherlands
Extensive finite-element calculations have been done on a novel type of optical telescope mounting to estimate the dynamic performance as well as the dynamic sensitivity of specific components of the structure. The finite-element analysis led to improved dynamics by welldirected stiffening of the basic structure. At the end of the process a lowest structural eigenfrequency of 8 Hz could be achieved for a 12-m telescope. The finite-element model of this design was also used to estimate the tracking performance of the mount directly. Moreover, it was used to establish and test a control scheme for the telescope that is able to damp the structure within less than a second but residuals in tracking error remain on smaller time scales. Those can not be removed by driving the entire mount but are to be eliminated via fine correction in a second stage.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Harald E. Nicklas, Hans Juergen Kaercher, D. Maurer, and B. Arras "Dynamics and control performance of a very large telescopic structure", Proc. SPIE 1271, Adaptive Optics and Optical Structures, (1 August 1990);


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