基于EKF容错滤波方法的编队卫星相对轨道自主确定

为避免因卫星测量野值导致的相对轨道估计与滤波精度下降,提出了一种基于残差正交性的扩展Kalman滤波（EKF）容错滤波算法的编队卫星相对轨道确定方法。根据卫星相对运动与相对位置量测方程,用残差序列方差的迹实现对野值的剔除及在线修正,保证滤波器有较强的鲁棒性、稳定性和精度。仿真结果表明：该法简单、有效,有较高的理论和工程应用价值。

Autonomous Determination of Relative Orbit for Satellite Formation Flying Using Fault Tolerant EKF

To improve the degraded estimation accuracy of the relative orbit and filtering of the satellites caused by the outliers,a method of the autonomous determination of relative orbit for satellite formation flying based on the residual orthogonal extended Kalman filtering with fault tolerant was put forward in this paper.The outliers′ eliminating and instant modifying were implemented by the trace of the residual series square error according to the measurement equations of the relative motion and position for the satellites,which could ensure the filter obtains stronger robustness,better stability and accuracy.The simulation results showed that this method was simple and effective,which was valuable in theory and engineering.