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Article

Thermal Balance and Active Damping of a Piezoelectric Deformable Mirror for Adaptive Optics

1
Department of Control Engineering and System Analysis, Université Libre de Bruxelles (ULB), CP. 165-55, 50 Av. F.D. Roosevelt, B-1050 Brussels, Belgium
2
European Space Agency—ESA/ESTEC, Opto-Electronics Section, Keplerlaan 1, 2201 AZ Noordwijk ZH, The Netherlands
*
Author to whom correspondence should be addressed.
Actuators 2019, 8(4), 75; https://doi.org/10.3390/act8040075
Received: 14 October 2019 / Revised: 24 October 2019 / Accepted: 26 October 2019 / Published: 1 November 2019
Piezoelectric unimorph deformable mirrors offer a cheap solution to adaptive optics, with mass production capability. However, standard solutions have significant drawbacks: (i) the static shape is sensitive to the temperature, and (ii) the low structural damping limits the control bandwidth, because of the interaction between the shape control and the vibration modes of the mirror. This paper discusses how these two problems may be alleviated by using a mirror covered with an array of actuators working in d31 mode on the back side and a ring of transducers (actuators and sensors) on the front side, outside the pupil of the mirror. View Full-Text
Keywords: piezoelectric; unimorph; bimorph; deformable mirror; adaptive optics; thermal control; active damping; modal filters piezoelectric; unimorph; bimorph; deformable mirror; adaptive optics; thermal control; active damping; modal filters
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MDPI and ACS Style

Wang, K.; Alaluf, D.; Preumont, A. Thermal Balance and Active Damping of a Piezoelectric Deformable Mirror for Adaptive Optics. Actuators 2019, 8, 75. https://doi.org/10.3390/act8040075

AMA Style

Wang K, Alaluf D, Preumont A. Thermal Balance and Active Damping of a Piezoelectric Deformable Mirror for Adaptive Optics. Actuators. 2019; 8(4):75. https://doi.org/10.3390/act8040075

Chicago/Turabian Style

Wang, Kainan, David Alaluf, and André Preumont. 2019. "Thermal Balance and Active Damping of a Piezoelectric Deformable Mirror for Adaptive Optics" Actuators 8, no. 4: 75. https://doi.org/10.3390/act8040075

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