Title
High-Performance Motion Control of the METIS Cold Chopper Mechanism
Author
Huisman, R.
Paalvast, S.
Brandl, B.R.
van den Dool, T.C.
Eggens, M.
Janssen, H.
Aitink-Kroes, G.
Molster, F.
Teuwen, M.
Venema, L.
Jayawardhana, B.
Publication year
2016
Abstract
We present the main results of the performance test campaign of the Mid-Infrared European Extremely Large Telescope Imager and Spectrograph (METIS) Cold Chopper Demonstrator (MCCD). This tip/tilt mirror, which operates at a temperature of 77 K, is one of the critical components in the METIS for the European Extremely Large Telescope. The performance requirements of the MCCD relate to the field of fast and very accurate reference tracking. We discuss the applicability of different high-performance motion control strategies and describe the control synthesis of a repetitive and of a novel hybrid controller. We identified the presence of nonlinearities in the plant, which limits the performance of the hybrid controller. The repetitive controller shows very promising results and can handle the nonlinearities in the system. This experimental phase concludes the MCCD program, which was initiated to verify the feasibility of a high-performance cryogenic tip/tilt mirror at an early stage in the METIS development. Because of the very promising test results, no significant changes to the hardware will be implemented. We believe that minor adjustments will suffice to meet all requirements of the final hardware after integration with the METIS instrument.
Subject
Nano Technology
OM - Opto-Mechatronics
TS - Technical Sciences
High Tech Systems & Materials
Materials
Industrial Innovation
Control synthesis
Tip/tilt mechanism
Control system analysis
Hardware
Hysteresis
Mirrors
Motion control
Optical telescopes
Reconfigurable hardware
Telescopes
Critical component
Extremely Large Telescopes
High-performance motion control
Hybrid controls
Performance requirements
Repetitive control
Repetitive controller
To reference this document use:
http://resolver.tudelft.nl/uuid:3010de96-af43-433e-b01f-a063749330e9
TNO identifier
572342
Publisher
Institute of Electrical and Electronics Engineers IEEE
ISSN
1083-4435
Source
IEEE/ASME Transactions on Mechatronics, 21 (5), 2453-2465
Article number
7487002
Document type
article