摘要
在库德式通信终端中,望远单元和库德反射镜与电荷耦合器(CCD)探测器之间的相对运动导致光路结构随通信终端姿态变化而改变,使得控制难度增大。为解决这一问题,利用矩阵光学方法建立库德式激光通信终端的CCD测角模型,设计基于模型-PID的控制算法,搭建实验测试系统验证了该算法在瞄准、捕获和跟踪过程中的性能。结果表明:利用实测数据对测角模型进行静态验证时,计算精度的均方根误差优于9μrad;加入角速度0.1°/s、幅值0.1°的正弦扰动信号进行跟踪测试时,实测动态跟踪误差的标准差优于21μrad(1σ),满足激光通信对于粗跟踪单元50μrad(1σ)跟踪精度的需求。
In the Coude-type communication terminal,the relative motion between the telescope unit,the Coude mirror and the charge coupled device(CCD)detector causes the optical path structure to change with the attitude of the communication terminal,which makes the control more difficult.To solve this problem,the CCD angle measurement model of Coude-type laser communication terminal is established by using matrix optical method,the control algorithm based on Model-PID is designed,and the experimental test system is built to verify the performance of the algorithm in the process of pointing,acquisition and tracking.The results show that the calculation accuracy of the angle measurement model is better than 9μrad(RMSE);the light spot capture process is stable without overshoot;the measured dynamic tracking error is better than 21μrad(1σ)when sin disturbance signal with angular velocity of 0.1°/s and amplitude of 0.1°is used,and meets the requirement of laser communication for tracking accuracy of 50μrad(1σ).
作者
白杨杨
陈力兵
孟立新
张乐仪
张立中
BAI Yangyang;CHEN Libing;MENG Lixin;ZHANG Leyi;ZHANG Lizhong(College of Mechatronic Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China;Fundamental Science on Space-Ground Laser Communication Technology Laboratory,Changchun University of Science and Technology,Changchun 130022, Jilin,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2021年第9期1931-1939,共9页
Acta Armamentarii
基金
教育部高校博士点基金项目(201322130006)。
关键词
激光通信终端
库德光路
电荷耦合器
测角模型
瞄准、捕获和跟踪
laser communication terminal
Coude-type optical path
charge coupled device
angle measurement model
pointing,acquisition and tracking
