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- W1964045669 abstract "This paper proposes a constructive controller design technique to optimize the closed-loop performance of adaptive optics systems in presence of deformable mirror's dynamics, based on LTI continuous-time models of the disturbance and mirror. This sampled-data stochastic minimum-variance control problem has an equivalent discrete-time and tractable LQG control formulation. We show that the optimal solution can be obtained in a simpler way than what was proposed previously in the literature, with all control calculations being performed using off-the-shelf state-space control software. The proposed formulation provides an easy tool for performance evaluation of sub-optimal controllers. As an illustrative example, control of the tip-tilt wavefront distortion modes for an Extremely Large Telescope (ELT)-class AO system in presence of poorly damped second order DM's dynamics well within the disturbance rejection bandwidth is presented. Variance calculations and time-domain simulations show that in this case, infinite actuator bandwidth is not mandatory, on the condition DM's dynamics be adequately accounted for." @default.
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- W1964045669 date "2014-06-01" @default.
- W1964045669 modified "2023-10-12" @default.
- W1964045669 title "Mirrors' dynamics: A plague for adaptive optics systems performance?" @default.
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- W1964045669 doi "https://doi.org/10.1109/ecc.2014.6862339" @default.
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