空间光通信捕获跟踪模拟演示系统  

Acquisition and tracking demonstration experiment system of space optical communication

作　　者：左韬[1,2] 黄海波[2] 苏贵波[2] 肖永军[2] 

机构地区：[1]武汉科技大学信息科学与工程学院,武汉430081 [2]武汉大学电子信息学院,武汉430079

出　　处：《光通信技术》2010年第7期46-49,共4页Optical Communication Technology

基　　金：湖北省教育厅科学技术研究项目(Q20092301)资助

摘　　要：针对移动平台空间光通信信标光捕获跟踪系统的要求,给出了ATP模拟演示系统的设计框图。对CCD采集的光斑图像,先用二维中值滤波来消除噪声点,然后用动态阈值分割出光斑图像,用形心算法定位光斑坐标。跟踪控制器采用增量PID控制来减小累积误差的影响,且便于DSP的实现。通过对模拟仿真台在不同运动速度时的二维转台动态跟踪实验结果分析表明模拟演示系统有较好的跟踪精度。The design diagrams of ATP demonstration experiment is presented according to the requirements of light beacon tracking and acquiring in mobile platform of space optical communication. Two-dimension median filtering is applied first to eliminate the noise spots from the light spot images acquisitioned by CCD. Then the dynamic threshold is used to segment the images. Besides, centroid tracking algorithm is adopted to locate the coordinates of light spot. Incremental PID controller is applied as tracking controller in order to decrease influence of accumulated errors and to realize conveniently on DSP. The dynamic tracking experimental curves of two-dimension rotating floor, which are acquisitioned in different movement velocities of simulation, imply the better tracking accuracy of the system.

关 键 词：ATP 中值滤波 阈值 增量PID 

分 类 号：TN929.1[电子电信—通信与信息系统]