Improved ADRC With ILC Control of a CCD-Based Tracking Loop for Fast Steering Mirror System

IEEE Photonics Journal

Yuliang Zhang¹  Tao Chen¹  Quanrui Dong¹  Yongkai Liu¹  Shijie Gao¹ 

[1] Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun Institute of Optics, Changchun, China;

关键词: Fast steering mirror;    disturbance suppression;    active disturbance rejection control (ADRC);    sliding mode control (SMC);    iterative learning control (ILC).;   

DOI  :  10.1109/JPHOT.2018.2846287

来源: DOAJ

【 摘 要 】

In order to improve the tracking accuracy of the fine tracking system of free-space optical communications, a proposed active disturbance rejection control (ADRC) with iterative learning control (ILC) strategy is designed to regulate the fast steering mirror (FSM) system. First, based on the open-loop frequency response results of the system, we can approximately confirm the system transfer function and prepare for the design of the controller. Then, an improved ADRC that using sliding mode control instead of the traditional nonlinear state error feedback method is proposed to attenuate the influence of the unknown and unmolded parts. In addition, the ILC method is used to compensate the hysteresis of piezoelectric actuators and improve the overall system performance. The experimental results indicate that the tracking accuracy of the system is 1 μrad at 1k sampling frequency. In addition, the recommended method shows the better disturbance suppression performance than traditional ADRC in simulation and experimental investigations. This method has a very high application value in the field of visual axis stability, adaptive optics, and other fields.

【 授权许可】

Unknown