Control issues of a fast positioner intended for deflection of a high power laser beam

Michał Bartyś , Maciej Bodnicki , Karol Bagiński , Wojciech Credo , Leszek Wawrzyniuk , Jakub Pełka


This paper discusses some crucial aspects of control of a fast positioner intended for positioning of a mirror reflecting high power laser beam. Positioner is driven by a two linear movement piezo actuators acting on a common flexible flat spring bending it in two perpendicular directions. The reflector is fixed to this spring. Clearly, the actuator is a dynamic oscillating system. This makes control of positioner demanding. In order to overcome the effects of static nonlinearity, hysteresis and their time evolution, there were proposed two independent closed loop positioning systems each governing each own axis. The simulation investigations allowed for determining the suboptimal structure and parameters of controllers. Two different control loops were investigated and discussed. The simulation experiments shown, that the most efficient controller is able to “mask” the actuator hysteresis while introducing appropriate dynamic damping and stiffness to the controlled system. The concept of the positioner controller was described and some chosen results of laboratory experiments were presented. Finally, the assessment of the control quality is given together with some general conclusions closing the paper.
Author Michał Bartyś (FM / IACR)
Michał Bartyś,,
- The Institute of Automatic Control and Robotics
, Maciej Bodnicki (FM / IMPh)
Maciej Bodnicki,,
- The Institute of Micromechanics and Photonics
, Karol Bagiński (FM / IMPh)
Karol Bagiński,,
- The Institute of Micromechanics and Photonics
, Wojciech Credo (FM / IMPh)
Wojciech Credo,,
- The Institute of Micromechanics and Photonics
, Leszek Wawrzyniuk (FM / IMPh)
Leszek Wawrzyniuk,,
- The Institute of Micromechanics and Photonics
, Jakub Pełka (FM / IMPh)
Jakub Pełka,,
- The Institute of Micromechanics and Photonics
Publication size in sheets0.55
Book Dudziak Marian, Malujda Ireneusz, Krawiec Piotr, Talaśka Krzysztof, Wilczyński Dominik, Górecki Jan, Berdychowski Maciej, Moskalewski Krzysztof, Warguła Łukasz, Wojtkowiak Dominik (eds.): MATEC Web of Conferences: Book of Abstracts, vol. 254, no. 01002, 2019, ISBN 978-83-7775-508-2
Keywords in Englishpiezoelectric actuator, fast positioning unit, hysteresis, control error, positioner, tracking error, laser beam reflector
Languageen angielski
Score (nominal)5
Score sourcepublisherList
ScoreMinisterial score = 5.0, 20-10-2019, MonographChapterAuthor
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