卫星光通信系统振动源的模拟设计  

Simulation Design of Vibration Source in Satellite Optical Communication System

作　　者：刘洋[1,2] 宋延嵩[1] 佟首峰[1] 常帅[1,2] 于笑楠 安喆[2] 

机构地区：[1]长春理工大学空地激光通信技术国防重点学科实验室,吉林长春130022 [2]长春理工大学光电工程学院,吉林长春130022

出　　处：《光学学报》2016年第12期67-73,共7页Acta Optica Sinica

基　　金：国家863计划(2014AA701178)

摘　　要：为了便于空间激光通信中捕获、跟踪性能的测试,提出了一种卫星振动模拟源系统设计方案。该系统主要由上位机借助LabVIEW软件解析标准振动功率谱密度函数,将模拟出的平台振动信号传给以STM32F4为核心的控制系统,驱动振镜进行俯仰、方位摆动。借助欧空局设计的SILEX平台模型,推导验证了本方案的可行性,并搭建实验现场,通过探测器对光斑脱靶量进行了实时监测,分析了脱靶量功率谱,同时对在实际应用中产生的伪随机序列进行了优化与处理。实验结果表明,设计的振动源幅值精度优于2μrad,模拟结果真实有效。另外由于其频率可调节,模拟系统幅度可达±10mrad,故易于模拟不同的标准模型,为复合轴捕获、跟踪和瞄准(APT)的实验室验证提供了条件。In order to test the performance of acquisition and tracking in space laser communications,a satellite vibration analog source system is proposed and designed.The system gets standard vibration power spectral density function by upper computer with LabVIEW software,and then transmits the simulated signals of vibration platform to control system with the core of STM32F4 in order to make the galvanometer swing for pitch and azimuth.Based on SILEX platform model designed by European Space Agency（ESA）,the feasibility of the program is derived and verified.Also an experimental site is built to monitor the miss distance in real time by detectors and analysis the miss distance power spectrum.Simultaneously,the pseudo-random sequence in practical applications is processed and optimized.The experimental results show the amplitude accuracy of vibration source is better than 2μrad and the system simulated results are real and effective.In addition,the amplitude of analog system can reach±10 mrad since its frequency can be adjusted.Therefore the system can easily simulate different standard models and provide the conditions for acquisition,pointing and tracking（APT）verification in the laboratory.

关 键 词：光通信 模拟源 卫星振动 捕获、跟踪和瞄准 SILEX平台 

分 类 号：TN929.1[电子电信—通信与信息系统]