回波瞄准系统中基于爬山法的光束闭环瞄准实验

瞄准偏差和光束抖动，会导致光束到达靶面能量的损失，是光束瞄准系统中两个最主要的误差。分析了以高斯光束和高斯抖动为基础的光束在照明目标时产生的光回波信号的特性；在此基础上，搭建了实验室平台，实现了基于二维爬山法的光束闭环瞄准，讨论了光束抖动对光束瞄准实时性的影响，分析了不同抖动强度下光束瞄准的精度。实验结果表明：爬山算法无需已知目标和光束分布的任何信息，即可实现光束回波闭环瞄准，且性能优良；但随着光束抖动的增加，其瞄准所需回波信号样本增大，瞄准精度降低。

Experiment of Closed-Loop Pointing Errors Compensated by Hill-Climbing Method in Laser Pointing System Using Return Photons

Energy losses on target caused by boresight and jitter are two fundamental pointing errors for a laser pointing system. The characteristics of return photons reflected from an intended target in a laser pointing system are studied and a laboratory device is set up. With the hill-climbing method, a closed-loop laser pointing is realized. Furthermore, the accuracy of this technology is analyzed with different jitters, and effect of jitter on real-time pointing is discussed. The experimental results demonstrate that, the performance of hill-climbing method is still excellent. Moreover, with the increasing of jitter, the sample size of return photons increases, and the pointing precision decreases.