12 September 2005 Adaptive control of a MEMS steering mirror for free-space laser communications
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This paper presents an adaptive control scheme for laser-beam steering by a two-axis MEMS tilt mirror used in current free-space optical communications systems. In the control scheme presented here, disturbances in the laser beam are rejected by a high-performance linear time-invariant feedback controller augmented by the adaptive control loop, which determines control gains that are optimal for the current disturbance acting on the laser beam. The variable-order adaptive control loop is based on an adaptive lattice filter that implicitly identifies the disturbance statistics from real-time sensor data. Experimental results are presented to demonstrate the effectiveness of the adaptive controller for rejecting multi-bandwidth jitter. These results demonstrate that the adaptive loop significantly extends the jitter-rejection bandwidth achieved by the feedback controller alone.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nestor O. Perez Arancibia, Nestor O. Perez Arancibia, Neil Chen, Neil Chen, Steve Gibson, Steve Gibson, Tsu-Chin Tsao, Tsu-Chin Tsao, } "Adaptive control of a MEMS steering mirror for free-space laser communications", Proc. SPIE 5892, Free-Space Laser Communications V, 589210 (12 September 2005); doi: 10.1117/12.619586; https://doi.org/10.1117/12.619586

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