Dynamic modeling, control and simulation of the EST telescope structure: quantifying performance during tracking operation

  1. Gonzalez-Cava, Jose M. 1
  2. Soler, Mahy
  3. González, Francisco
  4. Cózar-Castellano, Juan
  5. Mato, Ángel
  6. Belío-Asin, Marta
  7. Sánchez-Capuchino, Jorge
  8. Núñez Cagigal, Miguel A.
  9. Barreto, Mary
  1. 1 Universidad de La Laguna
    info

    Universidad de La Laguna

    San Cristobal de La Laguna, España

    ROR https://ror.org/01r9z8p25

Actas:
Modeling, Systems Engineering, and Project Management for Astronomy X

Año de publicación: 2022

Congreso: Modeling, Systems Engineering, and Project Management for Astronomy

Tipo: Aportación congreso

DOI: 10.1117/12.2628247 GOOGLE SCHOLAR

Resumen

The European Solar Telescope (EST) is a 4-m class solar telescope that will include a multi-conjugate adaptive optics system (MCAO) integrated in the telescope optical path. Currently, the EST is in its preliminary design phase, in which different alternatives for the main telescope subsystems must be proposed and evaluated to meet the main scientific requirements. The availability of models to predict the performance in this phase is therefore essential. A global end-to-end model including the main telescope structure control, the active optics system and adaptive optics strategy is planned for the EST. This document presents the in-house model developed to evaluate the dynamic requirements defined for the telescope structure during tracking operation. First, those requirements specified for the EST during tracking operation are presented. Then, the whole process to obtain and validate the dynamic representation of the telescope structure from the mechanical model is explained. Main dynamic loads likely to affect the tracking performance such as wind buffeting initially characterized for the EST are described. A controller is tuned for closed-loop axes control to ensure trajectory tracking while rejecting the wind effects. Finally, a Simulink model for the evaluation of the tracking performance including the main elements identified for the EST is proposed. Preliminary results based on simulations and their effects on the final telescope structure design are presented. In addition, possible implications on the tip-tilt control strategy to reduce residual image motion for an accurate image stability are analyzed.