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Time to go H_∞?

Erm, Toomas and Hurák, Zdeněk and Bauvir, Bertrand (2004) Time to go H_∞? In: Advanced Software, Control, and Communication Systems for Astronomy. Proceedings of SPIE. No.5496. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 68-78. ISBN 9780819454287.

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Traditionally telescope main axes controllers use a cascaded PI structure. We investigate the benefits and limitations of this and question if better performance can be achieved with modern control techniques. Our interest is mainly to improve disturbance rejection since the tracking performance normally is easy to achieve. Comparison is made to more advanced controller structures using H-infinity design. This type of controller is more complex and needs a mathematical model of the telescope dynamics. We discuss how to obtain this model and also how to reduce it to a more manageable size using state of the art model reduction techniques. As a design example the VLT altitude axis is chosen.

Item Type:Book Section
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Alternate Title:Time to go H-∞?
Additional Information:© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). This research work was supported by the European Southern Observatory (ESO) and Ministry of Education of the Czech Republic under Project LN00B096.
Funding AgencyGrant Number
European Southern Observatory (ESO)UNSPECIFIED
Ministry of Education (Czech Republic)LN00B096
Subject Keywords:Very Large Telescope, H-infinity optimal control, cascaded PI, disturbance rejection
Series Name:Proceedings of SPIE
Issue or Number:5496
Record Number:CaltechAUTHORS:20190221-110526624
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Official Citation:Toomas Erm, Zdenek Hurak, and Bertrand Bauvir "Time to go H-∞?", Proc. SPIE 5496, Advanced Software, Control, and Communication Systems for Astronomy, (15 September 2004); doi: 10.1117/12.555606;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93133
Deposited By: George Porter
Deposited On:25 Feb 2019 21:53
Last Modified:03 Oct 2019 20:51

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