Adaptive Optics Systems: A Challenge for Closed Loop Subspace Identifcation
Adaptive Optics Systems: A Challenge for Closed Loop Subspace Identifcation
复制标题
自适应光学系统：闭环子空间识别的挑战
DOI：
10.1109/acc.2007.4282939
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
E. Fedrigo
中科院分区：
文献类型：
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作者：
Alessandro Chiuso;Riccardo Muradore;E. Fedrigo
自适应光学元件允许在地面望远镜上获得天空（恒星和星系）的图片，其分辨率接近从大气外的望远镜（例如哈勃望远镜）外获得的分辨率。这需要控制可变形的镜子，以补偿大气引入的失真。在本文中，讨论了基于可以设计控制器的模型的问题。由于许多原因，此问题尤其具有挑战性，其中输入和输出空间的高维度。该系统具有60个输入（镜子上的压电执行器）和60个输出（雪崩光电二极管感知波前“斜率”）。使用最近开发的子空间方法报告了一些有希望的初步结果，该方法允许在闭环中执行识别。
Adaptive optics allows to obtain pictures of the sky (stars and galaxies) on ground telescopes with a resolution close to those obtained from telescopes outside the atmosphere, for example the Hubble telescope. This requires controlling a deformable mirror in order to compensate for the distortion introduced by the atmosphere. In this paper the problem of obtaining a model based on which controllers can be designed is discussed. This problem is particularly challenging for many reasons, among which the high dimensions of the input and output spaces. The system has 60 inputs (piezoelectric actuators on the mirror) and 60 outputs (avalanches photodiodes sensing the wavefront "slope"). Some promising preliminary results are reported using a recently developed subspace method which allows identification to be performed in closed loop.