简介:Todetectthelaserdopplersignal,theunknownsignalistrackedbytheknownsignalusingtheconceptoftopologicalcontravariance.TheunknowntopologicalspaceUandknownspaceMarefounded,andthentheunknownsignal'stransformationistrackeddynamicallyaccordingtothismappingrelationshipbetweenthetwospaces.Thesystemequationisobtainedbygradient-descentmethod,andtheconditionsofstabilityaregivenbyPoincarémapping.Theproposedmethodisappliedtomeasurethein-planedisplacementsignalofthesolid50mawayusinglaserdoppler,signal.Theresultprovesthatthemethodcandetectlaserdoppler.signalaccurately,itsrelativeerrorislessthan0.7%.