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- W2045293008 abstract "Adaptive control of a tip-tilt mirror requires precise model estimation, which is difficult for the nonlinear features ofpiezoelectric actuators such as creep, hysteresis and resonance. A linear quadratic Gaussian control/loop transferrecovery (LQG/LTR) based compensation of the non-linearity is used, which employs a high sampling frequencyposition sensor to measure the displacements of the tip-tilt mirror and feedbacks the modified command needed to makethe actuator response linearly to input command. A normalized LMS adaptive filter whose gains are adjusted by weightupdating algorithm to minimize the mean square error of the output is used in order to reduce the jitter introduced bykinds of broadband and narrowband disturbance. The principle of an adaptive filter and LQG/LTR compensatorcombination control of a nonlinear tip-tilt mirror is introduced. The method is compared with the integrator andLQG/LTR combination control by numerical simulation. Results reveal that the adaptive filter and LQG/LTRcompensator combination control is more effective and has less tracking residual error." @default.
- W2045293008 created "2016-06-24" @default.
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- W2045293008 date "2012-10-15" @default.
- W2045293008 modified "2023-09-23" @default.
- W2045293008 title "Adaptive filter and linear quadratic Gaussian/loop transfer recovery compensator combination control of a non-linear tip-tilt mirror" @default.
- W2045293008 doi "https://doi.org/10.1117/12.970528" @default.
- W2045293008 hasPublicationYear "2012" @default.
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