自由空间激光通信系统APT粗跟踪单元光斑检测优化设计  

The optimum spot detecting design of APT coarse tracking unit of free space laser communication system

作　　者：陈安松[1] 佟首峰[1] 宋延嵩[1] 任斌[1] 

机构地区：[1]长春理工大学空地激光通信国防重点学科实验室,长春130022

出　　处：《仪器仪表用户》2011年第4期75-79,共5页Instrumentation

基　　金：863-701基金资助项目

摘　　要：复合轴APT(Acquisition Pointing Tracking)控制子系统是自由空间激光通信系统中重要组成部分和关键技术,其中粗跟踪伺服单元主要完成高概率、快速捕获和高稳定、高精度跟踪。在简要介绍自由空间激光通信粗跟踪光斑检测的基础上,优化设计了APT粗跟踪光斑检测单元。以XILINX公司的Spartan-3E系列XC3S1200E型FPGA芯片为平台,完成了对光斑检测单元CCD相机图像进行模拟高斯分布的自适应滤波的实时处理,并对相机进行自适应光强控制,提高了粗跟踪光斑信号的检测精度。最后经过APT复合轴的实验系统测试得出:粗跟踪精度120μrad,可靠进入精跟踪视场。The compound-axis APT（Acquisition Pointing Tracking） control subsystem is not only one of the most important parts but also is one of the key of technologies on the Free Space Laser Communication（FSLC） system.In this subsystem,the Coarse Tracking Assembly mainly aimed to accomplish the high probability,fast acquisition and high stability coarse tracking.Based on the brief introduction of the spot detection on coarse tracking in the Free Space Laser Communication,optimum design of the APT coarse tracking spot detection unit.To XILINX＇s Spartan-3E FPGA chip series XC3S1200E type as a platform,completed the real time process of a CCD camera image spot detection unit,via analoging GAUSS distribution of adaptive filtering,and adaptive optical intensity controling of the camera,advance the precision of detecting of coarse tracking spot signal.Finally,thanks to the compound-axis APT control subsystem testing laboratory,it makes a conclusion that the coarse tracking accuracy is 120μrad,and it can reliable access to the field of fine tracking.

关 键 词：自由空间激光通信 捕获、瞄准、跟踪 粗跟踪 自适应控制 

分 类 号：TN929.1[电子电信—通信与信息系统]