Design of active disturbance rejection controller for space optical communication coarse tracking system

Jian Gu; Yong Ai

doi:10.1117/12.2202951

15 October 2015 Design of active disturbance rejection controller for space optical communication coarse tracking system

Jian Gu, Yong Ai

Author Affiliations +

Proceedings Volume 9671, AOPC 2015: Advances in Laser Technology and Applications; 96711Y (2015) https://doi.org/10.1117/12.2202951
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

In order to improve the dynamic tracking performance of coarse tracking system in space optical communication, a new control method based on active disturbance rejection controller (ADRC) is proposed. Firstly, based on the structure analysis of coarse tracking system, the simplified system model was obtained, and then the extended state observer was designed to calculate state variables and spot disturbance from the input and output signals. Finally, the ADRC controller of coarse tracking system is realized with the combination of nonlinear PID controller. The simulation experimental results show that compared with the PID method, this method can significantly reduce the step response overshoot and settling time. When the target angular velocity is120mrad/s, tracking error with ADRC method is 30μrad, which decreases 85% compared with the PID method. Meanwhile the disturbance rejection bandwidth is increased by 3 times with ADRC. This method can effectively improve the dynamic tracking performance of coarse tracking and disturbance rejection degree, with no need of hardware upgrade, and is of certain reference value to the wide range and high dynamic precision photoelectric tracking system.

Citation Download Citation

Jian Gu and Yong Ai "Design of active disturbance rejection controller for space optical communication coarse tracking system", Proc. SPIE 9671, AOPC 2015: Advances in Laser Technology and Applications, 96711Y (15 October 2015); https://doi.org/10.1117/12.2202951

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