Adaptive Optics Tip-Tilt Correction Based on Smith Predictor and Filter-Optimized Linear Active Disturbance Rejection Control Method

Lingxi Kong; Kangjian Yang; Chunxuan Su; Sicheng Guo; Shuai Wang; Tao Cheng; Ping Yang

doi:10.3390/s23156724

Adaptive Optics Tip-Tilt Correction Based on Smith Predictor and Filter-Optimized Linear Active Disturbance Rejection Control Method

Sensors (Basel). 2023 Jul 27;23(15):6724. doi: 10.3390/s23156724.

Authors

Lingxi Kong^{1

2

3}, Kangjian Yang^{1

2}, Chunxuan Su^{1

2}, Sicheng Guo^{1

2

3}, Shuai Wang^{1

2}, Tao Cheng^{1

2}, Ping Yang^{1

2}

Affiliations

¹ Key Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China.
² Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China.
³ School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.

Abstract

A tip-tilt mirror (TTM) control method is designed to enhance the control bandwidth and ensure the rejection performance of the adaptive optics (AO) tip-tilt correction system. Optimized with the Smith predictor and filter, linear active disturbance rejection (LADRC) is adopted to achieve the tip-tilt correction. An AO tip-tilt correction experimental platform was built to validate the method. Experimental results show that the proposed method improves the control bandwidth of the system by at least 3.6 times compared with proportional-integral (PI) control. In addition, under the same control bandwidth condition, compared with the Smith predictor and proportional-integral (PI-Smith) control method, the system is more capable of rejecting internal and external disturbances, and its dynamic response performance is improved by more than 29%.

Keywords: Smith predictor; adaptive optics; linear active disturbance rejection; tip-tilt mirror.

Abstract

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