Optimization of a Predictive Controller for Closed-Loop Adaptive Optics

Details Optimization of a Predictive Controller for Closed-Loop Adaptive Optics Optimization of a Predictive Controller for Closed-Loop Adaptive Optics

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apopt..37.4623d&link_type=abstract

Applied Optics LP, vol. 37, Issue 21, pp.4623-4633

Physics

Optics

10

Scientific paper

For closed-loop adaptive optics systems limited by time delay and measurement noise, we demonstrate that the ideal rejection transfer function is proportional to the frequency signal-to-noise ratio of the wave-front input. We describe a new modal linear predictive controller that approaches this ideal transfer function. Its parameters are optimized by minimization of the residual wave-front error with a modified recursive least-squares algorithm. The optimization can be performed with closed-loop data in the case of evolving turbulent conditions. We present numerical simulations to show the significant improvements brought by the predictor.

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