基于CD-RSF 算法的航天器姿态确定

针对具有模型不确定及初始误差较大的航天器姿态确定系统的滤波问题,提出一种基于中心差分风险敏感滤波(CD-RSF)算法的航天器姿态确定方法.该方法利用风险敏感滤波更具鲁棒性的特点来估计模型不确定的航天器姿态,并利用中心差分求积分法来解决风险敏感器滤波中难以处理的积分.该方法能够消除由于模型不确定和初始误差大而导致的滤波收敛速度慢,甚至发散的现象,使得姿态确定算法更具鲁棒性.仿真结果验证了所提出方法的有效性.

Spacecraft attitude determination based on CD-RSF algorithms

A spacecraft attitude determination method based on the CD-RSF algorithm is proposed to solve the filtering problem of the spacecraft attitude determination system with model uncertainty and large initial error. In this method, CD-RSF which is more robust is available to estimate spacecraft attitude with model uncertainty. And center differential is introduced to solve intractable integration in RSF. This method can eliminate the phenomenon of slow filtering convergence and divergence caused by model uncertainty and large initial error, so that the attitude determination algorithm is more robust. The simulation results show the effectiveness of the proposed method.