High performance control of mirror segment actuators for the European Extremely Large Telescope

Gert Witvoet; Remco den Breeje; Jan Nijenhuis; René Hazelebach; Niek Doelman

doi:10.1117/12.2056901

22 July 2014 High performance control of mirror segment actuators for the European Extremely Large Telescope

Gert Witvoet, Remco den Breeje, Jan Nijenhuis, René Hazelebach, Niek Doelman

Proceedings Volume 9145, Ground-based and Airborne Telescopes V; 91451S (2014) https://doi.org/10.1117/12.2056901
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

Segmented primary mirror telescopes require dedicated piston-tip-tilt actuators for optimal optical performance. TNO has developed various prototypes of such actuators, in particular for the E-ELT. In this paper the control results of a specific two-stage prototype will be presented. First, the dynamics of the actuator in interconnection with the to-be-positioned mass has been analyzed, both using frequency response measurements and first principles modeling, resulting in a detailed understanding of the dynamic behavior of the system. Next, feedback controllers for both the fine and the coarse stage have been designed and implemented. Finally, the feedback controlled actuator has been subjected to a realistic tracking experiment; the results have demonstrated that the TNO actuator is able to suppress wind force disturbances and ground vibrations with more than a factor 10₃, down to 1.4 nm RMS, which is compliant with the requirements.

Citation Download Citation

Gert Witvoet, Remco den Breeje, Jan Nijenhuis, René Hazelebach, and Niek Doelman "High performance control of mirror segment actuators for the European Extremely Large Telescope", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91451S (22 July 2014); https://doi.org/10.1117/12.2056901

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
14 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Photoacoustic tomography

Actuators

Prototyping

Mirrors

Sensors

Large telescopes

Telescopes

Show All Keywords

Keywords/Phrases

Search In:

Publication Years