26 May 1998 Control system of the VLT secondary mirror unit
Author Affiliations +
Proceedings Volume 3351, Telescope Control Systems III; (1998); doi: 10.1117/12.308792
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States
Abstract
The main functions of the control system for the very large telescope (VLT) secondary mirror unit are to control the focusing, centering and tilt/chopping movement of the secondary mirror. The most challenging feature of the VLT M2 unit is to tilt the mirror with very high precision and dynamic requirements in chopping and field stabilization mode. During chopping the mirror is tilted up to 10 times per second with a maximum chopping step of 120 arcsec about an arbitrary axis. In the field stabilization mode the mirror has to follow any angular reference signal up to 10 Hz bandwidth with a very high precision. This paper gives an overview on the VLT M2 unit control system with emphasis on the development and realization of chopping control The finally achieved performance and the gained experience are presented.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joerg Flemmig, Gerald Praeger, Karsten Baumann, "Control system of the VLT secondary mirror unit", Proc. SPIE 3351, Telescope Control Systems III, (26 May 1998); doi: 10.1117/12.308792; https://doi.org/10.1117/12.308792
PROCEEDINGS
11 PAGES


SHARE
KEYWORDS
Mirrors

Control systems

Digital signal processing

Telescopes

Electronics

Optical amplifiers

Sensors

RELATED CONTENT

Design of ground motion compensation servo system
Proceedings of SPIE (May 21 2013)
SpeX: a medium-resolution IR spectrograph for IRTF
Proceedings of SPIE (August 21 1998)
Actuators For A Segmented Mirror Control System
Proceedings of SPIE (November 03 1983)
NASA IRTF tip-tilt secondary system
Proceedings of SPIE (September 18 1997)
Adaptive secondary mirror for the 6.5 m conversion of the...
Proceedings of SPIE (September 27 1999)
LBT adaptive secondary units construction: a progress report
Proceedings of SPIE (October 25 2004)

Back to Top