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Proceedings Paper

Control of deformable mirrors including a nonlinear modal model for air gap damping
Author(s): Michael Böhm; Oliver Sawodny
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Paper Abstract

In this paper, we present nonlinear pressure dynamics as an extension to a linear distributed parameters model of a deformable mirror. The original, undamped model is recalled and measurement results are shown supporting the need for a damping model which includes the pressure dynamics of the air gap behind the mirror membrane. We will derive the damping coefficients to match our measurement results. Based on the mew model, we will derive a modal feedforward and feedback control law for 88 actuators based on only 3 position sensors and show simulation results to support the algorithm's effectiveness.

Paper Details

Date Published: 27 September 2016
PDF: 8 pages
Proc. SPIE 9953, Optical Modeling and Performance Predictions VIII, 995303 (27 September 2016); doi: 10.1117/12.2237839
Show Author Affiliations
Michael Böhm, Univ. Stuttgart (Germany)
Oliver Sawodny, Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 9953:
Optical Modeling and Performance Predictions VIII
Mark A. Kahan; Marie B. Levine-West, Editor(s)

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