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Optical Engineering

Variable-order adaptive control of a microelectromechanical steering mirror for suppression of laser beam jitter
Author(s): Nestor O. Perez Arancibia; Neil Chen; James Steven Gibson; Tsu-Chin Tsao
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Paper Abstract

We present an adaptive control scheme for laser-beam steering by a two-axis microelectromechanical systems (MEMS) fast steering mirror. Disturbances in the laser beam are rejected by a µ-synthesis 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 controller is based on an adaptive lattice filter that implicitly identifies the disturbance statistics from real-time sensor data. Experimental results demonstrate that the adaptive controller significantly extends the disturbance-rejection bandwidth achieved by the feedback controller alone. The experimental results also illustrate the value of the variable-order capability of the adaptive controller.

Paper Details

Date Published: 1 October 2006
PDF: 12 pages
Opt. Eng. 45(10) 104206 doi: 10.1117/1.2363189
Published in: Optical Engineering Volume 45, Issue 10
Show Author Affiliations
Nestor O. Perez Arancibia, Univ. of California/Los Angeles (United States)
Neil Chen, Univ. of California/Los Angeles (United States)
James Steven Gibson, Univ. of California/Los Angeles (United States)
Tsu-Chin Tsao, Univ. of California/Los Angeles (United States)

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