简介:Bystudyingthethermal-inducedphaseshiftmechanismofaninterferometricfiber-opticgyroscope(IFOG)sensingcoil,anovelgeneralizedexpressionbasedonathree-dimensional(3D)modelisproposed.ComparedwiththetraditionalpureShupeeffectmodel,thesimulationresultsshowthatthenew3Dmodel,includingelasticstrainandtheelasto-opticaleffect,candescribethethermaleffectofthecoilsmoreaccurately.Experimentswithtemperaturechangeratesbetween-40°Cand70°Careperformedtoverifytheeffectivenessoftheproposedgeneralizedexpression.Theresultsofourworkcanguideresearchersinidentifyingcountermeasurestoreducethethermal-inducedbiaserrorinIFOG.