空间激光通信系统光斑小目标跟踪算法研究

Research on small target tracking algorithm for space laser communication system

在空间激光通信链路中,大气湍流、结构设计误差、平台扰动等因素为链路的精确对准和精密跟踪带来了困难。为提高激光链路的跟踪精度,首先对光斑跟踪过程中的影响因素进行研究分析,继而对跟踪算法做出改进。针对跟踪目标特性,设计了一种自适应模板目标相关跟踪算法,并搭建了基于粗精复合轴跟踪系统的实验平台,开展了实验验证。结果表明:与当前常用跟踪算法相比,该设计处理速度可达1 kfps,目标跟踪位置与真实位置基本重合,目标跟踪准确率高于98%,在处理速度、跟踪准确率与算法鲁棒性上均有较大提升,具有一定的实用性。

In the research of space laser communication,due to the atmospheric attenuation,the structural design precision error,platform disturbance interference,etc.,it brings a large problem for the system precisely alignment work.First,we study and analyse the influencing factors of speckle tracking,and then improve the tracking algorithm.A target matching algorithm for adaptive window sizes is designed for tracking target characteristics.Take the experimental platform with the crude complex shaft tracking platform to set up an experiment.The results show that comparison with the current common tracking algorithm,the design processing speed can reach 1 kfps,the target tracking position is substantially complicated with the real location,the target tracking accuracy is higher than 98%,and the tracking accuracy and algorithm robustness has a large improvement,with certain practicality.