星间光通信中的APT技术及其控制系统

APT（Acquisition Pointing and Tracking）技术是星间光通信的关键技术。介绍了该技术中的扫描、捕获、指向、跟踪过程及其控制系统，重点论述了实现跟踪的困难性，相应地介绍了一种有效的扰动抑制控制系统。

APT is a key technology in space laser communication. In this paper, we introduce the scanning, acquisition, pointing, tracking process and the control system of the technology. The difficulty of tracking is discussed as the focal point, and an effective disturbing rejection control system is introduced.