“风云一号”B卫星姿态控制系统

“风云一号”气象卫星姿态控制系统采用了三轴稳定对地定向的主动控制方案。已发射了两颗（Ａ、Ｂ）卫星，其中Ｂ星是在Ａ星主控系统的基础上，增加了一个完整的备份系统，采取一系列冗余措施并设计全方位姿态重新捕获的故障对策。经飞行试验及在轨故障应急处理证明，系统设计是完善和成功的，其中反作用飞轮控制、偏置动量控制、磁章动进动和飞轮卸载控制、全方位姿态重新捕获方案在中国是首次采用，均取得了较好的飞行效果，为长寿命卫星姿态控制系统的设计积累了宝贵经验。

ATTITUDE CONTROL SYSTEM OF FY 1B SATELLITE

The three axis stabilized Earth oriented attitude control system adopted by FY 1 meteorological satellites represents an active control concept.Two satellites have been launched,namely FY 1A and FY 1B.Based on FY 1A's main attitude control system and with the addition of a set of backup system,FY 1B has taken a series of redundancy measures and designed an all directional attitude reacquisition method as failure countermeasures.The system's design has proved to be perfect and successful via flight test and on orbit trouble emergency removing.The maiden use of reaction wheel control,bias momentum control,magnetic nutation precession,wheel unloading control,and all directional attitude reacquisition has achieved fairly good results,thus accumulating valuable experiences for the design of long life satellite attitude control systems.