简介：Thereal-timeidentificationofdynamicparametersisimportantforthecontrolsystemofspacecraft.Theeigensystemrealizationalgorithm(ERA)iscurrentlythetypicalmethodforsuchapplica-tion.Inordertoidentifythedynamicparameterofspacecraftrapidlyandaccurately,anacceleratedERAwithapartialsingularvaluesdecomposition(PSVD)algorithmispresented.InthePSVD,theHankelmatrixisreducedtodualdiagonalformfirst,andthentransformedintoatridiagonalmatrix.TheeigenvaluesarecomputedbythebisectionmethodintermsoftheSturmproperty,andthecorrespondingeigenvectorsareob-tainedbytheinverseiterationmethod.Finally,theeigenvaluesandtheeigenvectorsaretransformedintothesingularvaluesandthesingularvaluevectorsoftheoriginalmatrix.Anexampleforspacestationispresent-edtodemonstratetheefficacyandaccuracyoftheproposedalgorithm.