星间激光通信组网中改进自抗扰控制研究  

Improved Active Disturbance Rejection Control in Inter-Satellite Laser Communication Network

作　　者：高运普 刘洋[1,2] 滕云杰 刘建华[2] 赵思思[3] 尚卫东[3] Gao Yunpu;Liu Yang;Teng Yunjie;Liu Jianhua;Zhao Sisi;Shang Weidong(Institute of Space Optoelectronics Technology,School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China;National and Local Joint Engineering Research Center of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130012,Jilin,China;Beijing Institute of Space Mechanics and Electricity,Beijing 100000,China)

机构地区：[1]长春理工大学光电工程学院空间光电技术研究所,吉林长春130022 [2]长春理工大学空间光电技术国家地方联合工程研究中心,吉林长春130012 [3]北京空间机电研究所,北京100000

出　　处：《光学学报》2024年第21期20-26,共7页Acta Optica Sinica

基　　金：吉林省科技发展计划(20240304109SF);第八届青年人才托举工程(2022QNRC001);国家重点研发计划重点专项(2022YFB3902500)。

摘　　要：为提高星间激光通信组网跟踪精度和光能量利用率,研究了一对多激光通信端机的控制策略。分析了一对多粗跟踪光学天线的结构和控制系统组成,针对实际控制中系统包含的内外部扰动,根据自抗扰控制设计了结合卡尔曼滤波的模型辅助扩张状态观测器,以提升扰动估计能力,并用期望频率响应法设计了控制器。对所提算法进行仿真,根据实际约束条件完成参数整定,仿真结果表明所设计的控制算法相比线性自抗扰和传统控制算法具有更强的跟踪性能和扰动抑制能力。搭建室内平台进行实验,结果表明,所设计的控制算法相比传统控制算法,对主镜的控制精度提高了34%,对从镜的控制精度提高了40%,总体控制精度得到显著提高。Objective Compared to the mainstream microwave communication methods,laser communication offers advantages such as high data rate,large capacity,compact size,low power consumption,and strong confidentiality.As satellite laser communication becomes increasingly practical,laser communication networking has emerged as a crucial research direction and foundational technology for future space-based communication.However,the narrow beam divergence of laser limits them to point-to-point communication,making them unsuitable for the wide coverage typically achieved with radio frequency communication.Achieving multi-beam,high-precision control under complex space conditions is one of the key challenges in inter-satellite laser communication networking.Currently,most laser communication tracking servo systems utilize the proportional-integral-derivative(PID)control algorithm.While there have been improvements to traditional control algorithms and applications of modern control methods,issues such as low control accuracy and application difficulty remain.In this study,we propose an improved active disturbance rejection control(ADRC)algorithm designed to improve control accuracy in laser communication networking.Methods The control strategy for a one-to-many laser communication terminal is studied.The structure and control system of a one-to-many coarse tracking optical antenna are analyzed.Based on ARDC principles,a model-assisted extended state observer combined with a Kalman filter is developed to improve disturbance estimation.The controller is designed using the desired frequency response method.Simulations are conducted,followed by experiments on an indoor platform.Results and Discussions In linear ADRC,the system is treated as a simple integrator chain when designing the control law.By incorporating known model information into the design of the extended state observer,we overcome the performance limitations of traditional observers.Thermal noise and ambient light can affect the positioning accuracy of the four-quadran

关 键 词：激光通信组网 自抗扰控制 卡尔曼滤波 四象限探测器 

分 类 号：TN929[电子电信—通信与信息系统]