激光通信用潜望式跟瞄转台伺服系统设计  

Servo System Design of Cycle-scan Tracking and Aiming Turntable for Laser Communication

作　　者：龚文 张立中[1,2] 白杨杨[1,2] 王天宇 GONG Wen;ZHANG Li-zhong;BAI Yang-yang;WANG Tian-yu(National and Local Joint Engineering Research Center of space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022;Fundamental Science on Space-Ground Laser Communication Technology Laboratory,Changchun University of Science and Technology,Changchun 130022;School of Mechatronic Engineering Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]长春理工大学空间光电技术国家地方联合工程研究中心,长春130022 [2]长春理工大学空地激光通信技术国防重点学科实验室,长春130022 [3]长春理工大学,机电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2019年第6期7-14,共8页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金重大研究计划(91338116)

摘　　要：在卫星激光通信的背景下,为了实现潜望式卫星通信终端对大口径地面站发出的目标光束的快速捕获和精确跟踪,需要具有潜望式通信终端伺服系统的跟踪精度高、低速平稳性好的性能。为此,从两个方面来保证潜望式通信终端的跟踪性能,一是设计了基于ARM和FPGA的伺服控制器,建立基础空间矢量控制的三闭环控制策略,二是建立基于潜望式结构的自动跟踪模型。根据永磁同步电机磁场定向控制原理(FOC)和空间矢量控制原理(SVPWM),进行了相关的硬件设计和控制算法设计。另由于潜望式跟踪结构在对目标光束进行跟踪时存在方位轴与俯仰轴的耦合关系,因此需要利用光学矩阵和转轴的旋转矩阵建立潜望式跟踪转台的自动跟踪模型。之后将单轴电机控制系统与自动跟踪模型相结合,实现潜望式通信终端对目标光束的精确跟踪。实验结果证明:本潜望式跟瞄转台伺服控制系统能够满足跟踪精度和低速平稳性的要求,并且根据建立的自动跟踪模型,实现对目标光束的精确跟踪,满足星间激光通信的高精度粗跟踪要求。Under the background of satellite laser communication,in order to realize the fast acquisition and accurate tracking of the target beam emitted by the perimeter satellite communication terminal to the large aperture ground station,the servo system of the perimeter communication terminal needs high tracking accuracy and good stability at low speed.Therefore,in this paper,the tracking performance of the periscopical communication terminal is guaranteed from two aspects.One is the design of servo controller based on ARM and FPGA,the establishment of three closed-loop control strategy of basic space vector control;and the other is the establishment of automatic tracking model based on periscopical structure.According to the principle of permanent magnet synchronous motor field oriented control(FOC)and space vector control(SVPWM),the related hardware design and control algorithm design are carried out.In addition,the coupling relationship between the azimuth axis and the pitch axis exists in the perimeter tracking structure when tracking the target beam,so it is necessary to establish the automatic tracking model of the perimeter tracking turntable by using the optical matrix and the rotation matrix of the rotating axis.Then,the single-axis motor control system and the automatic tracking model are combined to realize the precise tracking of the target beam by the perimeter communication terminal.The experimental results show that the servo control system of the perimeter tracking and aiming turntable can meet the requirements of tracking accuracy and low speed stability,and according to the established automatic tracking model;it can achieve accurate tracking of the target beam and meet the requirements of high precision rough tracking of inter-satellite laser communication.

关 键 词：激光通信 ARM FPGA 潜望式跟踪转台 

分 类 号：TN9291[电子电信—通信与信息系统]