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基于动态Allan方差的光纤陀螺随机误差分析(英文).docx

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基于动态Allan方差的光纤陀螺随机误差分析(英文) Title:RandomErrorAnalysisofFiberOpticGyroscopeBasedonDynamicAllanVariance Abstract: FiberOpticGyroscopes(FOGs)havegainedsignificantattentioninvariousapplicationsduetotheirexcellentnavigationandguidancecapabilities.However,likeanyothermeasurementdevice,FOGsaresubjecttoinherentrandomerrorsthatcanaffecttheaccuracyandreliabilityofthemeasurements.Inthispaper,wepresentacomprehensiveanalysisoftherandomerrorsinFOGsbasedontheDynamicAllanVariance(DAV)method.TheDAVapproachenablesamoreaccuratecharacterizationoftherandomerrorsbyconsideringthetemporaldynamicsofthegyroscope'soutput. Keywords:FiberOpticGyroscope,RandomError,DynamicAllanVariance,Analysis,Accuracy 1.Introduction Theaccuratemeasurementofangularrotationiscrucialinnumerousapplications,suchasaircraftnavigation,satelliteattitudedetermination,andautonomousvehiclecontrol.FiberOpticGyroscopes(FOGs)haveemergedasareliableandcompactsolutionformeasuringangularrotation.FOGsutilizetheinterferenceoflightinacoiledfiberopticcabletodetectrotation,providinghighprecisionandstabilitycomparedtoconventionalmechanicalgyroscopes. 2.RandomErrorSourcesinFOG FOGsareinfluencedbyvarioussourcesofrandomerrorsthatcandegradetheirperformance.Theseerrorscanbecategorizedintoseveraltypes,includingnoise-inducederrors,drifterrors,scalefactorerrors,andbiaserrors.Thenoise-inducederrorsarisefromthedetectionprocessandtheinherentnoiseinthegyroscope'scomponents.Drifterrorsrefertotheslow,time-varyingchangesinthegyroscope'soutputovertime.Scalefactorerrorsresultfromnonlinearityandgainvariationsinthegyroscope'soutput.Lastly,biaserrorsareconstantoffsetsinthegyroscope'soutput. 3.DynamicAllanVarianceanditsApplication TheAllanVariance(AV)isacommonlyusedstatisticalmethodtoanalyzetherandomerrorsingyroscopemeasurements.However,itassumesthattheerrorsarestationaryovertheentiremeasurementperiod.Inreal-worldscenarios,randomerrorsinFOGsareoftennon-stationaryduetoenvironmentalfactors,temperaturevariations,andagingeffects.Toaddressthislimitation,theDyna