Paper 13100-41
Paper 13100-41
Instrument Rotators. Performance using different electromechanical systems
17 June 2024 • 16:15 - 16:30 Japan Standard Time | Room G214, North - 2F
Abstract
Instrument rotators provide high accuracy instrument rotation at a commanded angle to ensure telescope pupil tracking. The experience gained over the years in working with several types of rotators is summarized in this paper. Not only experimental methods, but also mechanical and control models have allowed us to understand the system in depth. The paper focuses on rotators with two servomotors working together to counteract backlash and rotators with directly coupled motors. For the latter, balanced and unbalanced loads are studied. The mechanical model used to control the servo is explained and analyzed. During the development of the study, different rotator work schedules will be investigated. Tracking will be the focus of the study. The HARMONI rotator and the QUIJOTE telescopes (telescopes built by the Spanish company IDOM) in operation at the Teide Observatory (Tenerife) will therefore be the focus of our attention.
Presenter
Instituto de Astrofísica de Canarias (Spain)
Teodora Viera, senior engineer in the Electronics Department of the IAC. Experience in design, integration and verification of electronic systems in astrophysical instrumentation since 1990.
The Solar Tracking Correlator (KIS-IAC) (1990-1993), Optical Ground Station (ESA-IAC) (1994-2003), IAC80 and Carlos Sanchez telescopes electromechanical and instrumentation upgrade (IAC)(2003- 2005), Adaptive Optics using FPGAs (IAC) (2005-2009), Extremely large telescopes associated technologies (ESO-IAC) (2005-2009), PACT-ELT Prototype (E-ELT M1 Position Actuator) (CESA-IAC) (2009-2011), QUIJOTE Scientific Development Programme (Microwave Instrumentation) (IAC) (2011-2021), HARMONI (High Angular Resolution Monolithic Optical and Near-infrared Integral field spectrograph) (ELT instrument) (2021-Now) are the main projects I have been involved in.
The main capabilities acquired are in electromechanical, automatic and control, real-time processing, digital electronic design.