星间光通信中振动抑制的研究

Vibration suppression in optical inter-satellite communications

星间光通信是极具前景的空基通信方式。通信双方光束的捕获 ,对准和跟踪为星间光通信必须解决的关键技术之一。光通信终端作为卫星的有效载荷 ,受到卫星平台及空间环境的影响。本文首先概要地说明了星间光通信对准和跟踪系统的设计要求 ,分析了卫星平台振动 ,给出了典型的振动功率谱密度 ,可行的扰动抑制方法和 APT系统的设计。最后设计了跟踪子系统 ,对其扰动抑制性能进行仿真。

Optical inter satellite communications is a promising method in space based communications.Optical communication transceiver is impacted by platform vibration and space environment as payload of satellite.This paper summarily explains the design requirement of acquisition,pointing and tracking system firstly,then presents the vibration of satellite and typical vibration's power spectral density.It also provides the feasible methods of vibration suppression and design methods of APT system.A tracking subsystem with composite axis control is designed.Finally,this paper uses simulation to verify vibration suppression performance of the designed system.Simulation results shows the efficiency of the designed system.