基于强跟踪扩展Kalman滤波的X射线脉冲星导航定轨精度研究  

Research on Accuracy of Orbit Determination in X-ray Pulsar Navigation Based on Strong Tracking Extended Kalman Filter

作　　者：杜健[1] 费保俊[1] 刘颖[2] 潘高田[3] 要俊杰[1] 孙维瑾[1] 

机构地区：[1]装甲兵工程学院基础部,北京100072 [2]中国航天空气动力技术研究院,北京100074 [3]装甲兵工程学院装备指挥与管理系,北京100072

出　　处：《装甲兵工程学院学报》2011年第2期93-96,共4页Journal of Academy of Armored Force Engineering

基　　金：军队科研计划项目

摘　　要：为提高X射线脉冲星导航定轨精度,依据脉冲星导航原理,建立了X射线脉冲星自主导航系统的状态方程和观测方程,提出用强跟踪扩展Kalman滤波（Strong Tracking Extended Kalman Filter,STEKF）替代扩展Kalman滤波,并对3颗脉冲星卫星运行的位置和速度估计进行了仿真实验。仿真结果表明：STEKF具有使滤波器能够自适应地校正估计偏差并迅速跟踪状态变化的能力,有效地提高了卫星运动状态的估计精度和数值稳定性。In order to improve the accuracy of orbit determination for the spacecraft,a navigation system state equation and an observational equation are established according to the X-ray pulsar autonomous navigation principle,the Strong Tracking Extended Kalman Filter（STEKF） instead EKF is proposed,and the simulation experiment is carried on the position and speed operation estimate of three pulsars.The simulation results shows that STEKF has the ability of enabling the filter adaptively to correct estimate deviations and rapidly track state changes,effectively improving the estimation precision of the satellite motion state and numerical stability.

关 键 词：扩展Kalman滤波 强跟踪扩展Kalman滤波 X射线脉冲星自主导航 渐消因子 滤波性能 

分 类 号：P131[天文地球—天体力学] V44[天文地球—天文学]