Publications of the MPIfR
Optical & Infrared
Interferometry Group
Wolfgang Gaessler, Thomas Bertram, F.
Briegel, Thomas M. Driebe, Matthias Heininger, Edmund Nussbaum, Clemens
Storz, J. Wang, Lahbib Zealouk, Thomas M. Herbst, Roberto Ragazzoni, A.
Eckhardt, and Gerd P. Weigelt
UML modeling of the LINC-NIRVANA control
software
Advanced Software, Control, and Communication Systems
for Astronomy
,
Proceedings of SPIE Volume 5496.
Edited by Hilton Lewis, Gianni Raffi: The International Society
for Optical Engineering, 2004., p.
Abstract
LINC-NIRVANA is a Fizeau interferometer for the Large
Binocular Telescope (LBT) doing imaging in the near
infrared (J,H,K - band). Multi-conjugated adaptive optics
is used to increase sky coverage and to get diffraction
limited images over a 2 arcminute field of view. The
control system consists of five independent loops, which are
mediated through a master control. Due to the configuration, LINC-NIRVANA
has no delay line like other interferometers. To remove residual
atmospheric piston, the system must control both the primary and
secondary mirrors, in addition to a third, dedicated piston mirror.
This leads to a complex and interlocked control scheme and
software. We will present parts of the instrument software design,
which was developed in an object-oriented manner using UML. Several
diagram types were used to structure the overall system and
to evaluate the needs and interfaces of each sub-system to
each other.
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