Mixed-Sensitivity $H_\infty$ Control of Magnetic-Fluid-Deformable Mirrors

作者: Azhar Iqbal , Zhizheng Wu , Foued Ben Amara

DOI: 10.1109/TMECH.2010.2051452

关键词: WavefrontEngineeringControl theorySurface shapeDeformable mirrorSensitivity (control systems)Adaptive opticsControl algorithmTracking (particle physics)Control theory

摘要: This paper presents an H∞ controller designed to cancel dynamic wavefront aberrations in adaptive optics (AO) system based on a magnetic-fluid-deformable mirror (MFDM). MFDMs are recently proposed novel type of active optical elements called correctors, which constitute the central part AO systems. They offer cost and performance advantages over existing correctors. have been found particularly suitable for ophthalmic imaging systems where they can be used compensate complex eye that blur images internal parts eye. However, their practical implementation clinical devices is hampered by lack effective methods control shape deformable surface. Specifically, algorithms dynamically varying need developed. one such algorithm high-order time-varying using MFDM. The developed mixed-sensitivity design method enables tracking desired MFDM surface also limits magnitude currents applied Experimental results showing closed-loop comprising 19-channel prototype presented.

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