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首页> 外文会议>Conference on MEMS Adaptive Optics; 20080122-24; San Jose,CA(US) >Synthesis of Approximate Zonal Controllers for MEMS DMs
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Synthesis of Approximate Zonal Controllers for MEMS DMs

机译：MEMS DM的近似分区控制器的综合

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摘要

We present a novel technique for the design of DM controllers in high spatial resolution adaptive optics systems, operating in open-loop. It consists of a Shack-Hartmann (SH) figure sensor and multiple overlapping MIMO controllers based on the H_∞ synthesis method. The controller synthesis can be carried out periodically using a linearized representation of a continuously adjusted model that accounts for varying physical or ambient conditions and incorporates the spatial geometry of the SH The figure sensor uses a bright reference source and a fast CMOS detector to sample the DM surface sequentially with an optical arrangement that does not interfere with the main corrected beam. Taking full advantage of such robust techniques, the controller can successfully handle the dynamics and non-linearity of the DM, allowing one to decouple, from the main AO control loop standpoint, the turbulence estimation errors from those originating in the DM servo-loop. It can also implement noise and vibration rejection without compromising the loop stability, pushing the control bandwidth to the physical limits imposed by hardware and software components. By splitting the control function into several overlapping controllers, implementation complexity is reduced and continuous updating of the controller can be easily achieved. Simulations show its ability to successfully control the DM shape, in spite of partial and non-simultaneous sampling of the SH figure sensor due to detector speed limitations.
机译：我们提出了一种新颖的技术，用于在开环下操作的高空间分辨率自适应光学系统中设计DM控制器。它由Shack-Hartmann（SH）图形传感器和基于H_∞综合方法的多个重叠MIMO控制器组成。控制器的合成可以使用连续调整模型的线性表示来定期进行，该模型考虑了不同的物理或环境条件并结合了SH的空间几何形状。图形传感器使用明亮的参考源和快速CMOS检测器对DM进行采样依次以不干扰主校正光束的光学布置对表面进行校正。充分利用这种强大的技术，控制器可以成功地处理DM的动态和非线性，从而使AO控制器从主AO控制回路的角度出发将湍流估计误差与DM伺服回路中的误差分离开。它还可以在不损害环路稳定性的情况下实现噪声和振动抑制，从而将控制带宽推到硬件和软件组件所施加的物理极限。通过将控制功能分成几个重叠的控制器，可以降低实现的复杂性，并且可以轻松实现控制器的连续更新。尽管由于检测器速度的限制而对SH图形传感器进行了部分和非同时采样，但仿真显示了其成功控制DM形状的能力。

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