湖面自由空间光通信信标光的粗跟踪设计与实验

以湖面信标光为真实移动跟踪目标,设计了二维粗跟踪演示系统,验证空间光通信捕获、跟踪和对准(ATP)系统对机动目标的跟踪性能。采用双DSP和两轴精密转台搭建了粗跟踪的硬件平台。采用直方图阈值分割法将信标光从复杂的湖面背景中分离出来。采用预测自校正控制算法设计粗跟踪系统的控制器,具有较好的鲁棒性。进行了针对湖面移动信标光的二维跟踪实验,实验结果表明,粗跟踪系统有较好的跟踪精度,跟踪精度与跟踪距离远近关系不大,满足空间光通信跟踪系统的要求。

Design and experiment of coarse tracking for beacon on the lake surface in FSO communications

A two-dimensional coarse tracking demonstration system is designed to verify the tracking performance of maneuvering target,namely the beacon on the lake surface.First,double-DSP and two-axis rotary platform are adopted to construct the hardware platform for coarse tracking.Then,the grayscale histogram is used to segment beacon from complex lake surface background.The predictive self-correcting control algorithm is applied to design the system controller which has better robustness.Finally,two-dimensional tracking experiments are conducted.The experimental results demonstrate that the tracking accuracy is not related to the distance.This system has higher tracking accuracy and can satisfy the requirements for space optical communication.