陆地生态系统碳监测卫星控制系统方案设计及在轨验证

Design of Control System and On-Orbit Test for Ju-Mang Satellite

陆地生态系统碳监测卫星(句芒号)主要用于陆地生态系统碳监测、陆地生态和资源调查监测、国家重大生态工程监测评价等,句芒号卫星控制分系统设计了高精度的姿态确定、高稳定的姿态控制算法和混合轨迹规划姿态机动算法.针对载荷对月定标的需求设计任意时刻经过任意惯性空间位置的惯性扫描模式,针对卫星自主任务规划的需求,设计一种基于地表模型图的星下点地表属性预报方法和高精度的火点视线指向地理经纬度计算方法,并为火点检测敏感器提供了太阳天顶角、卫星天顶角、相对方位角等云判辅助信息火点位置的实时动态预报,在轨实现了高可靠的敏感器火点指向计算和伪火点剔除.根据卫星在轨运行数据,给出相应指标实现情况,对姿态控制系统的方案和指标满足情况进行在轨验证.

The Ju-Mang Satellite is mainly used for carbon monitoring of terrestrial ecosystems,investigation and monitoring of terrestrial ecology and resources,and monitoring and evaluation of national major ecological projects.The Ju-Mang control subsystem adopts a high-precision attitude determination,high stable attitude control and hy-brid trajectory planning attitude maneuver algorithm.According to the demand of the load for the monthly calibra-tion,an inertial scanning mode is designed,which can pass through any space position at any time.According to the requirements of satellite autonomous mission planning,a surface attribute prediction method based on the sur-face model map is designed.For the first fire-detection sensor,a high-precision calculation of the geographical lon-gitude and latitude of the fire point is designed,and relative surface linear velocity and the auxiliary cloud judgment information such as the solar zenith angle,satellite zenith angle and relative azimuth angle are provided for the sen-sor to dynamic fire point prediction.In orbit,the highly reliable fire pointing calculation and false fire point are re-alized.Based on on-orbit data of Ju-Mang satellite,the implementation of specific indexes is proposed.Further-more,the scheme of control system is tested on orbit.