关键词: 北斗三号卫星导航系统, 姿态控制, 轨道控制, 功能链, 天文导航, 偏航机动, 磁卸载

Abstract: In order to adapt to the unprecedented development of satellite development technology and scale, and achieve high reliability and low cost at the same time, the author reorganizes the traditional subsystem design methods according to the characteristics and disciplines, and puts forward the domestic initialtive subject chain design method, which has been successfully applied to the beidou3 experimental satellites, networking satellites and backup satellites, realizing the rapid mass production networking of Beidou3 (BDS3) satellite. This paper describes the design concept based on the subject chain, and focuses on the attitude and orbit control technology of beidou3 satellite based on the subject chain. The onboard operation results show that the satellites function continuously and reliably, and fully meets the high control accuracy requirements of Ka and laser intersatellite links and the requirements of navigation satellites for high continuity.

Key words: BDS3 satellite navigation system, attitude control, orbit control, subject chain, celestial navigation, yaw sheering, magnetic unloading