空间的在轨补给技术是航天器主要的在轨服务模式之一。它是延长航天器的有效工作寿命、提高航天器经济效益的主要技术手段。本文在大量掌握材料的基础上,分析了在轨补给技术的现状;概括了空间在轨加注的技术要求;对比了三种典型的在轨加注方案:直接加注,更换贮箱,整体更换推进舵;最后以双组元推进剂加注系统为例,简介系统的结构和工作原理。 Space on-orbit supply technology is one of the main in-orbit service modes for spacecraft. It is the main technical means to extend the effective working life of the spacecraft and improve the economic benefits of the spacecraft. Based on a large amount of materials, this paper analyzes the current situation of on-orbit replenishment technology, summarizes the technical requirements of in-orbit-in-place filling, and compares three typical on-rail refueling schemes: direct filling, Replace the propulsion rudder; Finally, take the two component propellant filling system as an example to introduce the structure and working principle of the system.