【摘要】 主要研究空间光通信中光束抖动的跟踪控制,建立了以可开窗口高帧频CMOS相机和大规模FPGA芯片为核心的全功能camera link光束跟踪控制硬件平台。并在FPGA芯片中嵌入实现了全部跟踪控制算法,包括图像处理中将二元线性插值结合重心算法实现光斑的高精度定位,以及流水线并行运算的模糊增益自调整PID跟踪控制的状态机等。实验结果表明系统实时性强,算法的时间开销很小,光斑的定位精度高,跟踪带宽达到200 Hz以上,低频时跟踪精度约为2μrad,实现了光束抖动的高带宽高精度的跟踪控制。更多还原

【Abstract】 Tracking and control of beam dithering in space optical communication was mainly researched,a set of full function camera link hardware platform for beam tracking and control was built,which consists of a high frame frequency CMOS camera and a large scale FPGA chip.All the tracking and control algorithms are implemented in the FPGA chip,which include dual linear interpolation combining with gravity algorithm in image processing for realizing high precise beam location and the state machine of fuzzy gain self-tuning PID tracking controller with pipeline parallel computation style.Experimental results show that this tracking and control system has the characteristics of high real-time performance,small algorithm time overhead and high precision beam location;the tracking bandwidth is over 200 Hz and the tracking precision is about 2 μrad at low frequency.The proposed system accomplishes high-bandwidth and high-precision beam tracking and control.更多还原