多敏感器卫星姿态确定的联邦滤波器设计

针对由惯性测量组件、星敏感器、数字式太阳敏感器和红外地球敏感器构成的卫星姿态确定系统 ,提出采用联邦滤波器进行信息融合。设计了多敏感器信息融合的联邦滤波器结构和算法 ,推导了卫星姿态确定的误差状态方程和各子系统的量测方程。仿真分析结果表明 ,采用联邦滤波器对多敏感器卫星姿态确定系统进行信息融合 ,能够以较小的计算量实现高精度的信息融合 ,并且还能使高精度的信息融合具备容错性能

Federated Filter Design for Multi-sensors Satellite Attitude Determination

A federated filter is designed to fuse information from the inertial measurement unit, the star sensor, the digital sun sensor and the digital earth sensor which compose the satellite attitude determination system. The algorithm and structure of the federated filter are proposed. The error propagation equations and the each subsystem measurement equations of the satellite attitude determination system are derived. Simulation results show that the federated filter realizes the optimal estimation at the cost of low computational complexity. And when parts of attitude sensors fail, the federated filter could still give satisfied estimation uninfluenced by the information of failed attitude sensors.