基于前馈补偿的空间光通信精跟踪控制研究  

Study on fine tracking control system for space optical communication based on feed-forward compensation

作　　者：黄海波[1] 艾勇[1] 章勇勤[1] 左韬[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079

出　　处：《光电子．激光》2010年第2期209-212,216,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(10477014)

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。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.

关 键 词：捕获、对准和跟踪(APT)精跟踪 前馈补偿 模糊比例、积分和微分(PID) 小脑模型神经网络(CMAC) 

分 类 号：TN929.1[电子电信—通信与信息系统]