摘要
基于FPGA的精跟踪系统结构和工作原理,跟踪控制采用自适应模糊PID算法,在线实时动态调整PID参数值,在16km的星地光通信的精跟踪系统演示实验中实现了对通信光束功率(1550nm)的稳定,极大地提高了通信中1550nm光功率耦合效率,通过实验数据分析,精跟踪系统的跟踪精度达到了2.4μrad。
The fine tracking is the core technology of APT （acquisition,pointing and tracking） system in the satellite-to-ground optical communication.The construction and principle of fine tracking system based on FPGA are introduced and analyzed.A novel adaptive fuzzy PID algorithm is introduced,in which the weights of PID parameters can be adjusted in real time.In a terrestrial free-space 16 km optical data link,the experiments of fine tracking are demonstrated successfully.The resuts show that the efficiency of fiber coupling is enhanced obviously,and the tracking precision reaches 2.4 μrad at 16 km distance.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2010年第5期682-685,共4页
Journal of Optoelectronics·Laser
基金
湖北省教育厅教研基金资助项目(CXY2009B032)
关键词
星地光通信
瞄准、捕获和跟踪(APT)
精跟踪
模糊PID算法
光纤耦合
satellite-to-ground optical communication
acquisition
pointing and tracking（APT）
fine tracking
fuzzy PID algorithm
fiber coupling
