空间科学学报
空間科學學報
공간과학학보
CHINESE JOURNAL OF SPACE SCIENCE
2000年
1期
40-47
,共8页
近地卫星—自主定轨—序贯UD协方差分解算法—摄动函数
近地衛星—自主定軌—序貫UD協方差分解算法—攝動函數
근지위성—자주정궤—서관UD협방차분해산법—섭동함수
Autonomous orbit determination%Kalman filter%Sequential UD covariance factorization algorithm%Disturbance function
为了用GPS实现近地卫星的高精度自主定轨, 提出了采用序贯UD协方差分解滤波算法作为定轨算法. 完整地给出了序贯UD分解算法的计算公式, 详细地推导了系统的状态方程和观测方程, 建立了由9维状态向量和8维观测向量组成的导航系统模型. 最后作了数字仿真试验, 试验结果表明,文中的定轨算法既有较高的精度又便于星上计算机的实现.
為瞭用GPS實現近地衛星的高精度自主定軌, 提齣瞭採用序貫UD協方差分解濾波算法作為定軌算法. 完整地給齣瞭序貫UD分解算法的計算公式, 詳細地推導瞭繫統的狀態方程和觀測方程, 建立瞭由9維狀態嚮量和8維觀測嚮量組成的導航繫統模型. 最後作瞭數字倣真試驗, 試驗結果錶明,文中的定軌算法既有較高的精度又便于星上計算機的實現.
위료용GPS실현근지위성적고정도자주정궤, 제출료채용서관UD협방차분해려파산법작위정궤산법. 완정지급출료서관UD분해산법적계산공식, 상세지추도료계통적상태방정화관측방정, 건립료유9유상태향량화8유관측향량조성적도항계통모형. 최후작료수자방진시험, 시험결과표명,문중적정궤산법기유교고적정도우편우성상계산궤적실현.
To realize GPS orbit determination for low eartharbit satellites, a navigation algorithm called sequential UD covariancefactorization algorithm is proposed in this paper. Formulas of UDalgorithm are given completely, and state equations and measurementequations are derived in detail in the paper. Mathematical model of thenavigation system is built, which is composed of nine state vectors andeight observation vectors. Finally, numerical simulation experiments areconducted. Simulation results indicate that UD algorithm can not only providehigh positioning precision but also be fit for computers onboard lowearth orbit satellites.
