北斗三号卫星与上面级供电相关接口分析及验证

卫星采用运载火箭上面级发射入轨期间，经历了由大椭圆轨道至圆轨道的过程，飞行姿态经历了变轨、慢旋、分离后巡航等多个阶段。在太阳翼展开前，卫星要经历比自身变轨更为恶劣的高低温环境及能源紧张等供电风险。在分离时刻的太阳翼碰撞或干涉安全性也需要重点关注和分析。针对北斗三号一箭双星采用上面级直接入轨方式的特点，分析了卫星与上面级间的供电和热设计接口，并从双星分离安全性角度考虑，分析影响卫星与上面级接口安全性的主要要素，并对应用和验证情况进行总结。

Analysis and Verification of the Electrical Power Interface Between Beidou-3 Satellites and Upper Stage

When two Beidou satellites are carried by upper stage from large ellipse orbit to round orbit, the flight attitude experiences the orbit maneuver, the slow rotation, the cruise after separation and so on. Before the deployment of solar wings, the satellites experience more severe temperature environment than traditional orbit maneuver by itself, and power supply shortage such as battery over discharge. And the collision or interference safety of the solar wings at the moment of separation also needs to be focused on and analyzed. This paper analyzes the power supply and thermal design interface between the satellite and the upper stage according to the characteristics of the direct orbit entry mode of the upper stage, and analyzes the main factors affecting the safety of the interface between the satellite and the upper stage from the perspective of the safety of the separation of the two satellites, and summarizes the application and verification.