系统可靠性SusPensionsystem15oneofthekeyPartsofmaglevtrain.Itsseeurityandreliability15 direetlyresPonsibletothesafetyofmaglevtrain.Thereforetheresearehonfaultdiagnosis(FD) andfaulttolerantcontrol(FTC)methodsforsusPensionsystem15ofgreatsignificanee. ThisPaPerdoessomegroPingstudyofFDandFTCforsusPensionsystemoflow一sPeed maglevtrain.ManymethodsareadoPtedtodesignFDandFTCstrategies,andthenthorough analysis,eomPareandimProvementaredonetothem.TheeffeetoftheseFDandFTC strategies15Provedbysimulation. First,anaetiveFTCstrategy15designedforsensor faultsofsusPensionsystemwhieh15 eomPosedoftwosubsystem一FDsubsystemandeontrollawredistributionsubsystem.TWo strategiesareadoPtedforthedesignoftheFDsubsystem.Thefirstone15baseontraeking differentiator(TD)andcanonlydiagnoseaeeelerometerfault.SimulationshowsthattheFD strategybasedon“fast,,(akindofTD)15themosteffeetiveone.Afterthat,thestrategy15 imProvedeonsideringthefluetuationoftherail.Theseeondone15basedonPrineiPal eomPonentanalysiseombinedwithTDWhich15moreadaptivetoeachkindofsensorfaultsof susPensionsystem.Simulationshowsthatthisstrategyeanreducethetimeeonsumingand misinformationofFDsystem.ThesimulationalsoshowsthetimeeonsumingofeaehFD strategy· faultsofsusPensionsystemwhieh15 eomPosedoftwosubsystem一FDsubsystemandeontrollawredistributionsubsystem.TWo strategiesareadoPtedforthedesignoftheFDsubsystem.Thefirstone15baseontraeking differentiator(TD)andcanonlydiagnoseaeeelerometerfault.SimulationshowsthattheFD strategybasedon“fast,,(akindofTD)15themosteffeetiveone.Afterthat,thestrategy15 imProvedeonsideringthefluetuationoftherail.Theseeondone15basedonPrineiPal eomPonentanalysiseombinedwithTDWhich15moreadaptivetoeachkindofsensorfaultsof susPensionsystem.Simulationshowsthatthisstrategyeanreducethetimeeonsumingand misinformationofFDsystem.ThesimulationalsoshowsthetimeeonsumingofeaehFD strategy·