Abstract: Thetakeoffstabilityoflunardetectorisanimportantperformanceindexofanascender′stakingofffromthemoon′ssurface.Bychoosingsomemaininfluencefactorsoftakeoffstability,thetakeoffdynamicapproximationmodelofascenderwasestablishedcombiningwithanoptimallatinhypercubeexperimentaldesignmethodandtheRBFneuralnetwork,andthesensitivityofthefactorsfortheangulardisplacementandvelocitywasquantitativelyanalyzed.Basedonthestabilitycriterionthattheangulardisplacementandangularvelocityofascenderswas5°and5(°)/srespectively,theboundaryvaluesofasingleinfluencefactorweregiven.Aprogramformultiplefactorsboundaryanalysisoftheascendertakeoffstabilitywascompiled.Theboundaryexpressionoftheascendertakeoffstabilityisfoundedbythewayofthreedimensionalspace,andthetakeoffstabilityboundariesweredeterminedwithasample.

Key words: spacecraftstructureanddesign, lunardetector, takeoffstability, approximationmodel, sensitivity, criticalcondition, compositivecriterion