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Proceedings Paper

End-to-end simulation of the image stability for the airborne telescope SOFIA
Author(s): Ulrich Schoenhoff; Peter Eisentraeger; Karl Wandner; Hans Juergen Kaercher; Rainer Nordmann
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Paper Abstract

To provide astronomers access to infrared wavelength unavailable from the ground the airborne telescope SOFIA is in development. This paper focuses on the image stability of the telescope, its modeling and simulation. The operation of the telescope under the harsh environmental conditions in the aircraft makes the prediction of the image stability during the design process necessary. For this purpose an integrated mathematical simulation model, which includes the optics, the structural dynamics and the control loops has been constructed. Because of the high relevance of the structural dynamics for image stability and control design, special attention is paid to the import and reduction of the finite element model of the telescopes mechanical structure. Different control approaches are considered for the attitude control and the compensation of the impact of the structural flexibility on the image motion. Additionally the secondary mirror servo-mechanism is utilized to optimize the image stability. Simulation results are shown.

Paper Details

Date Published: 20 June 2000
PDF: 10 pages
Proc. SPIE 4014, Airborne Telescope Systems, (20 June 2000); doi: 10.1117/12.389115
Show Author Affiliations
Ulrich Schoenhoff, Darmstadt Univ. of Technology (Germany)
Peter Eisentraeger, MAN Technologie AG (Germany)
Karl Wandner, MAN Technologie AG (Germany)
Hans Juergen Kaercher, MAN Technologie AG (Germany)
Rainer Nordmann, Darmstadt Univ. of Technology (Germany)

Published in SPIE Proceedings Vol. 4014:
Airborne Telescope Systems
Ramsey K. Melugin; Hans-Peter Roeser, Editor(s)

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