Precision control of airborne laser communication optical axis using sliding mode observer

被引：0

作者：

Wang D. ^{[1
]}

Kong G. ^{[2
]}

Chen S. ^{[3
]}

机构：

[1] School of Mechanical and Electrical Engineering, Henan Polytechnic, Zhengzhou

[2] School of Information Engineering, Zhengzhou University of Technology, Zhengzhou

[3] School of Electrical Engineering, Zhengzhou University, Zhengzhou

来源：

Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2022年 / 51卷 / 03期

关键词：

Airborne laser communication system; Back-stepping sliding mode control; Disturbance; Optical axis alignment; Sliding mode observer;

D O I：

10.3788/IRLA20210460

中图分类号：

学科分类号：

摘要：

To improve the optical axis alignment accuracy of airborne laser communication system under the disturbance of body vibration and mechanical friction, a back-stepping sliding mode control method based on sliding mode observer was proposed. Firstly, the mathematical model of the airborne laser communication system was established, and then the disturbance value was estimated by the designed sliding mode observer. At the same time, the back-stepping sliding mode control law was gradually designed for the command conversion module, laser communication module and motor module, which realized the high-precision control for the optical axis of the airborne laser communication system. The experimental results show that the proposed method has better rapidity and accuracy than the fractional PID control method, the response time is only 0.4 s, the maximum space alignment error is only 0.3 m, the designed sliding mode observer can estimate the disturbance value quickly and accurately, the response time is only 0.3 s, and the maximum estimation error is only 0.1 m/s, 0.06 (°)/s2 and 0.07 A/s, which greatly improves the alignment accuracy of the optical axis in the airborne laser communication system. Copyright ©2022 Infrared and Laser Engineering. All rights reserved.

引用

共 16 条

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