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Proceedings Paper

Wind Evaluation Breadboard electronics and software
Author(s): Miguel Núñez; Marcos Reyes; Teodora Viera; Pablo Zuluaga
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Paper Abstract

WEB, the Wind Evaluation Breadboard, is an Extremely Large Telescope Primary Mirror simulator, developed with the aim of quantifying the ability of a segmented primary mirror to cope with wind disturbances. This instrument supported by the European Community (Framework Programme 6, ELT Design Study), is developed by ESO, IAC, MEDIA-ALTRAN, JUPASA and FOGALE. The WEB is a bench of about 20 tons and 7 meter diameter emulating a segmented primary mirror and its cell, with 7 hexagonal segments simulators, including electromechanical support systems. In this paper we present the WEB central control electronics and the software development which has to interface with: position actuators, auxiliary slave actuators, edge sensors, azimuth ring, elevation actuator, meteorological station and air balloons enclosure. The set of subsystems to control is a reduced version of a real telescope segmented primary mirror control system with high real time performance but emphasizing on development time efficiency and flexibility, because WEB is a test bench. The paper includes a detailed description of hardware and software, paying special attention to real time performance. The Hardware is composed of three computers and the Software architecture has been divided in three intercommunicated applications and they have been implemented using Labview over Windows XP and Pharlap ETS real time operating system. The edge sensors and position actuators close loop has a sampling and commanding frequency of 1KHz.

Paper Details

Date Published: 14 July 2008
PDF: 11 pages
Proc. SPIE 7019, Advanced Software and Control for Astronomy II, 70190K (14 July 2008); doi: 10.1117/12.788891
Show Author Affiliations
Miguel Núñez, Instituto de Astrofísica de Canarias (Spain)
Marcos Reyes, Instituto de Astrofísica de Canarias (Spain)
Teodora Viera, Instituto de Astrofísica de Canarias (Spain)
Pablo Zuluaga, Instituto de Astrofísica de Canarias (Spain)
Altran Technologies (Spain)

Published in SPIE Proceedings Vol. 7019:
Advanced Software and Control for Astronomy II
Alan Bridger; Nicole M. Radziwill, Editor(s)

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