Design of optical axis jitters rejecting controller with lag compensator

Long Ou; Jingliang Gu; Chuanlin Xie

doi:10.1117/12.2565312

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17 April 2020 Design of optical axis jitters rejecting controller with lag compensator

Long Ou, Jingliang Gu, Chuanlin Xie

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Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 1145570 (2020) https://doi.org/10.1117/12.2565312
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China

Abstract

Due to the thermal effects, the airflow disturbance and the platform vibration, the random jitters of laser axis are caused, which have a serious impact on the laser coherent combining. If the conventional PID controller is used to reject the disturbance, the control bandwidth will be lager, but the high frequency noise of the system will be significantly amplified, so that the control error increases. The open-loop disturbance data spectrum is analyzed to add a lag compensator. The results show that the system has a good effect on rejecting the jitters of the middle-and-low frequency optical axis, while the high frequency noise has on amplification effect, which decreases the control error of the system.

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Long Ou, Jingliang Gu, and Chuanlin Xie "Design of optical axis jitters rejecting controller with lag compensator", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 1145570 (17 April 2020); https://doi.org/10.1117/12.2565312

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