Dynamics and control performance of a very large telescopic structure

Harald E. Nicklas; Hans Juergen Kaercher; D. Maurer; B. Arras

doi:10.1117/12.20419

1 August 1990 Dynamics and control performance of a very large telescopic structure

Harald E. Nicklas, Hans Juergen Kaercher, D. Maurer, B. Arras

Proceedings Volume 1271, Adaptive Optics and Optical Structures; (1990) https://doi.org/10.1117/12.20419
Event: The International Congress on Optical Science and Engineering, 1990, The Hague, Netherlands

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.20419

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available