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Proceedings Paper

VISTA telescope mount: factory testing prior to optics integration
Author(s): Paul Jeffers; Brian Stobie; Stan Hermann; Brad McCreight
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Paper Abstract

VISTA is a survey telescope which will deliver 0.5 arc second images over a 2 degree diameter unvignetted field of view. The Telescope Work Package which includes both the Mount and M1 support system is being designed and built by VertexRSI. The Contract includes an extensive factory test programme after full assembly of the telescope systems. The main optical elements in projects this size are ordered early so that they are ready for integration with the telescope on site. This means that testing of the telescope with its optics in the factory environment is rarely possible. So to try and avoid problems during site integration, the scope and extent of hardware and control system factory testing is significant and should be suitably in-depth. This paper describes the metrology and testing carried out to date in the factory environment. In addition the axis control system was simulated using Matlab-Simulink models. The models were also used as the basis of software verification using hardware-in-the-loop tests in a model-based development process. This development process and subsequent factory testing is described in some detail, and covers the mount axes and the M1 support system. In conclusion this paper discusses the perceived usefulness of the extent of the factory testing employed and how this is expected to mesh with the process of telescope and optics integration on site.

Paper Details

Date Published: 26 June 2006
PDF: 12 pages
Proc. SPIE 6267, Ground-based and Airborne Telescopes, 626739 (26 June 2006); doi: 10.1117/12.671814
Show Author Affiliations
Paul Jeffers, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
Brian Stobie, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
Stan Hermann, VertexRSI, General Dynamics C4 Systems (United States)
Brad McCreight, VertexRSI, General Dynamics C4 Systems (United States)

Published in SPIE Proceedings Vol. 6267:
Ground-based and Airborne Telescopes
Larry M. Stepp, Editor(s)

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