Fuzzy active disturbance rejection control of fine tracking system for free space optical communication

CUI Ning; CHEN Xing-lin; CAO Kai-rui; YU Zhi-liang; XU Chuan-chuan

doi:10.3788/OPE.20152305.1394

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Fuzzy active disturbance rejection control of fine tracking system for free space optical communication

更新时间：2020-08-13

- Fuzzy active disturbance rejection control of fine tracking system for free space optical communication
- Optics and Precision Engineering Vol. 23, Issue 5, Pages: 1394-1400(2015)
- 作者机构：
  
  1. 哈尔滨工业大学可调谐激光技术国家级重点实验室,黑龙江哈尔滨,中国,150001
  2. 哈尔滨工业大学航天学院,黑龙江哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152305.1394
  CLC： TN929.1
- Received：20 August 2014，
  
  Revised：12 October 2014，
  
  Published：25 May 2015
- 稿件说明：
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崔宁, 陈兴林, 曹开锐等. 空间光通信精跟踪系统的模糊自抗扰控制[J]. 光学精密工程, 2015,23(5): 1394-1400

CUI Ning, CHEN Xing-lin, CAO Kai-rui etc. Fuzzy active disturbance rejection control of fine tracking system for free space optical communication[J]. Editorial Office of Optics and Precision Engineering, 2015,23(5): 1394-1400
崔宁, 陈兴林, 曹开锐等. 空间光通信精跟踪系统的模糊自抗扰控制[J]. 光学精密工程, 2015,23(5): 1394-1400 DOI： 10.3788/OPE.20152305.1394.

CUI Ning, CHEN Xing-lin, CAO Kai-rui etc. Fuzzy active disturbance rejection control of fine tracking system for free space optical communication[J]. Editorial Office of Optics and Precision Engineering, 2015,23(5): 1394-1400 DOI： 10.3788/OPE.20152305.1394.

摘要

针对输入光束抖动及卫星本体微振动对空间光通信系统跟踪精度的影响

设计了模糊自抗扰控制器

提出了对精跟踪系统进行控制的方法。首先

建立了精跟踪系统模型

对系统内外扰动进行分析

并模拟了卫星振动信号。针对系统自身所受的扰动及输入光信号的不确定性

设计了模糊自抗扰控制器。提出的控制方法通过扩张状态观测器观测卫星本体振动及系统未建模动态

应用微分跟踪器提高系统动态响应性能

并用模糊控制原理改进了非线性状态误差反馈控制律

使其可以自适应调整比例和微分增益。最后进行了实验分析

结果表明:与PID控制方法相比

模糊自抗扰控制方法在不同频率及幅值的输入信号下均能提高系统跟踪精度

跟踪精度可以达到8 rad

跟踪误差减小了50%左右。该方法基本满足空间光通信精跟踪系统对跟踪速度、跟踪精度及抗干扰能力的要求。

Abstract

In consideration of the effects of input beam jitter and satellite micro vibration on the tracking precision of a space optical communication system

a fuzzy active disturbance rejection controller is designed and a control method for the fine tracking system in optical communication is proposed. Firstly

a fine tracking system model is established

the internal and external disturbances of the system are analyzed and the satellite vibration signals are simulated. Then

focused on the uncertainties of system disturbance and input optical signals

the fuzzy active disturbance rejection controller is designed. The proposed method observes satellite vibration and unmodelled dynamics of the system by an extended state observer and uses a differential tracker to improve the dynamic response performance of the system. Then it utilizes fuzzy control theory to improve the nonlinear state error control law

by which the system can adjust adaptively proportion and differential gains. Finally

the experiments analysis are performed and compared with PID control method. It shows that the fuzzy active disturbance rejection control method improves the system tracking accuracy under the input signals with different frequencies and amplitudes

the tracking accuracy has reached to 8 rad

and the tracking error reduces about 50 percent. This method basically meets the requirements of tracking systems of optical communication for tracking speeds

tracking accuracy and antijamming capability.

关键词

Keywords

references

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