Research on line-of-sight stabilization control for servomechanism tracking system based on moving platform using sensor fusion technology

Jinyang Lin; Yunxia Xia; Rongqi Ma; Qiang Wang; Qiliang Bao

doi:10.1117/12.2604751

13 December 2021 Research on line-of-sight stabilization control for servomechanism tracking system based on moving platform using sensor fusion technology

Jinyang Lin, Yunxia Xia, Rongqi Ma, Qiang Wang, Qiliang Bao

Author Affiliations +

Proceedings Volume 12075, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Intelligent Sensing Technologies and Applications; 1207508 (2021) https://doi.org/10.1117/12.2604751
Event: Tenth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2021), 2021, Chengdu, China

Abstract

A feedforward control method based on sensor fusing is proposed to improve the bandwidth of disturbance suppression for compound axis servomechanism tracking system (CASTS). This method takes advantage of the fiber-optic gyroscope (FOG) and the fine charge couple device (FCCD). Two sensor signals are decoupled and fused to obtain a precise observation of the disturbance. The FOG signal contains disturbance information and target moving information, yet the target information cannot be used for feedforward because it’ll deteriorate target tracking capability of the system. The high-pass filter is designed to filter out the low-frequency target signal. However, the high-frequency sampling of the fine FCCD sensor is insufficient. To avoid the inappropriate high-frequency signal of the FCCD, the complementary low-pass filter is applied to the FCCD. An accurate disturbance observation can be achieved by decoupling and fusing the FOG signal and the FCCD signal. The fused disturbance is fed forward to the fast- steering mirror (FSM) which possesses a higher control bandwidth to achieve the line-of-sight (LOS) stabilization control. Finally, comparative simulations are conducted to verify the disturbance rejecting performance of the proposed method. The results indicate that the disturbance suppression performance of the system can be significantly improved by applying the proposed method. A higher disturbance rejection band and a higher disturbance rejection ratio (DRR) can be obtained compared to the conventional control method.

Citation Download Citation

Jinyang Lin, Yunxia Xia, Rongqi Ma, Qiang Wang, and Qiliang Bao "Research on line-of-sight stabilization control for servomechanism tracking system based on moving platform using sensor fusion technology", Proc. SPIE 12075, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Intelligent Sensing Technologies and Applications, 1207508 (13 December 2021); https://doi.org/10.1117/12.2604751

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KEYWORDS

Control systems

Fiber optic gyroscopes

Linear filtering

Charge-coupled devices

Servomechanisms

Line of sight stabilization

Mirrors

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