In order to track the beacon facular accuratly and real time for fine tracking system in free space optical communication,a set of fuzzy proportional integral and derivative(PID)control system based on feed-forward compensation is designed,the fine tracking control platform is developed by adopting CMOS camera with camera-link interface and large scale FPGA chip,and the function modules such as image processing,feed-forward compensation and fuzzy PID algorithms are all integrated into FPGA chip.Fuzzy PID in...