Talks and Poster Presentations (with Proceedings-Entry):
H. Song, R. Fraanje, G. Schitter, G. Vdovin, M. Verhaegen:
"Modeling and Control of a Nonlinear Dynamic Adaptive Optics System";
Talk: 5th IFAC Symposium on Mechatronic Systems,
- 09-15-2010; in: "Proceedings of the 5th IFAC Symposium on Mechatronic Systems",
Closed-loop adaptive optics (AO) systems are widely used in many scientific and
medical applications, such as astronomy, laser systems and microscopy, to improve the resolution
of the image by actively sensing and correcting the optical aberration in the system. The
performance of the closed-loop AO system with conventional linear-static-model based controller
degrades if the AO system suffers from nonlinearity or the dynamics is significant. In this
paper, we propose and validate a strategy to model and control a nonlinear dynamic AO
system. The performance of the closed-loop AO system is improved in three successive steps:
hysteresis compensation, closed-loop subspace identification and model-based controller design.
Experimental results show that the convergence speed of the closed-loop AO system has been
improved significantly. The variance of the residual error has been reduced by 30% with respect
to the conventional AO control approach.
adaptive optics, hysteresis compensation, closed-loop subspace identification, model-based controller design.
Created from the Publication Database of the Vienna University of Technology.