中文摘要：

针对空间光通信精跟踪系统存在非线性、时延滞后的特性而难于建立精确的数学模型,设计了基于前馈补偿的模糊比例、积分和微分（PID）控制系统。采用camera-link接口的高帧频可开窗口CMOS相机和大规模FPGA芯片,设计了精跟踪处理控制平台。将图像处理、前馈补偿和模糊PID控制等功能全部集成在FPGA芯片内部,大大降低了系统体积和成本;将模糊PID与前馈补偿相结合,极大提高了系统的控制精度和抑制外部干扰的能力。测试结果表明,该系统稳定精度高、抗干扰能力强。

英文摘要：

Aiming at the problem of nonlinearity and time delay in fine tracking system for space optical communication,which makes it difficult to set up a precise mathematical model,a set of fuzzy PID control system based on feed-forward compensation is designed,and a fine tracking control platform is developed by means of adopting openable windows CMOS camera with camera-link interface and large scale FPGA chip.The function modules such as image processing,feed-forward compensation and fuzzy PID algorithms are all integrated into FPGA chip,which greatly reduce equipment′s bulk and cost.Fuzzy PID integrated with feed-forward compensation improves the control precision and enhances the anti-jitter ability of nonlinear system largely.Indoor test demonstrates that this system has the characteristics of high stability precision,powerful anti-jitter ability and better practical value.