Title :
Rejecting the low-frequency noise in the 10m diameter primary mirror of the GRANTECAN telescope
Author :
Acosta, Leopoldo ; Sigut, Marta ; Méndez, Juan A. ; Hamilton, Alberto ; Marichal, Graciliano N. ; Torres, Santiago ; Moreno, Lorenzo
Author_Institution :
Dept. of Appl. Phys., Univ. of La Laguna, Tenerife, Spain
Abstract :
The goal of this paper is to provide an overview of the studies that have been done with the aim of finding a controller that solves the noise rejection problem in the 10m diameter primary mirror of the Grantecan Telescope. In the first place, a method for decoupling the dynamics of this large-scale MIMO system is presented. A change of basis makes the decoupling possible, becoming an important result for control purposes. In addition to this, the possibility of making tests with a scale model of the mirror is specially interesting thanks to the decoupling. Secondly, this scale model is described and its dynamic identified using an ARMAX model. Finally, a discussion about the design of a controller for low-frequency noise rejection in the scale model´s segments and the results obtained are presented
Keywords :
MIMO systems; astronomical telescopes; autoregressive moving average processes; control system synthesis; interference suppression; large-scale systems; mirrors; multivariable control systems; optical variables control; 10 m; ARMAX model; GRANTECAN telescope; controller design; large-scale MIMO system; low-frequency noise rejection; primary mirror; Actuators; Extraterrestrial measurements; Frequency; Image segmentation; Large-scale systems; Low-frequency noise; Mirrors; Optical design; Telescopes; Testing;
Conference_Titel :
Control Applications, 2001. (CCA '01). Proceedings of the 2001 IEEE International Conference on
Conference_Location :
Mexico City
Print_ISBN :
0-7803-6733-2
DOI :
10.1109/CCA.2001.974001
