上海航天
上海航天
상해항천
AEROSPACE SHANGHAI
2012年
6期
26-31,67
,共7页
郭雪姣%周海银%潘晓刚
郭雪姣%週海銀%潘曉剛
곽설교%주해은%반효강
卫星轨道确定%无迹转换%无迹Kalman滤波%滤波发散%抑制%改进UKF
衛星軌道確定%無跡轉換%無跡Kalman濾波%濾波髮散%抑製%改進UKF
위성궤도학정%무적전환%무적Kalman려파%려파발산%억제%개진UKF
Satellite orbit determination%Unscented transform%Unscented Kalman filtering%Instability%Suppression%Improved unscented Kalman' filtering
为避免实际应用中一般无迹Kalman滤波（UKF）算法的不稳定性，基于对传统线性Kalman框架的UKF算法造成滤波发散现象的阐述，讨论了无迹转换（uT）的基本原理开口UKF算法，并给出了造成滤波发散的原因，提出了两种抑制滤波发散的改进UKF算法。仿真分析了某星载GPS低轨卫星轨道发散的主因，结果表明改进算法有效。
為避免實際應用中一般無跡Kalman濾波（UKF）算法的不穩定性，基于對傳統線性Kalman框架的UKF算法造成濾波髮散現象的闡述，討論瞭無跡轉換（uT）的基本原理開口UKF算法，併給齣瞭造成濾波髮散的原因，提齣瞭兩種抑製濾波髮散的改進UKF算法。倣真分析瞭某星載GPS低軌衛星軌道髮散的主因，結果錶明改進算法有效。
위피면실제응용중일반무적Kalman려파（UKF）산법적불은정성，기우대전통선성Kalman광가적UKF산법조성려파발산현상적천술，토론료무적전환（uT）적기본원리개구UKF산법，병급출료조성려파발산적원인，제출료량충억제려파발산적개진UKF산법。방진분석료모성재GPS저궤위성궤도발산적주인，결과표명개진산법유효。
In order to prevent from the instability of common unscented Kalman filtering (UKF) algorithm in practical application, the principle and algorithm of unscented transform (UT) were discussed based on the interpretion of filtering spreading caused by the linear Kalman frame in this paper. The reasons of instability of UKF were given out. Two improved algorithms for the filtration spreading-suppression were put forward. The main causes of the orbit instability for some spacehorne GPS low orbit satellite were analyzed by the simulation. The results showed that the improved algorithm was effective.
