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1、IIIIIAbstractTitle：ResearchandImplementationofErrorCalibrationofThreeAxisMagnetometerMajor：CircuitandSystemName：XiaowenGONGSignature:Supervisor:Prof.XiaoliXISignature:AbstractWiththemagneticfieldhasbeenstudiedmoredeeply,toacquiretheinformationofmagneticfi
2、eldismoreandmoreimportance,sothereisagreatsignificancefortheaccuratemeasureofmagneticfield.Triaxialmagnetometerisameasuringinstrumentwhichcanmeasurethemagneticfieldcomponentandthetotalmagneticfieldvector,butsomefactorssuchastheprocesstechnology,theimpacto
3、ftheinstallationlevelandoutsideinterferenceinevitablyleadtotheerrorsofbias,non-orthogonalitybetweenthedifferentsensoraxes,scalefactor,hardironhysteresis,softironhysteresisandnoise,whichcouldcausethewrongmeasurementsofthreeaxismagnetometer,sotheerrorscalib
4、rationisnecessary.Inthispaper,itmainlystudiestheerrorcalibrationtechniquesofthreeaxismagnetometerandathree-axismagnetometerdataacquisitionsystemisdevelopedfinally.Firstly,thesignificanceoferrorcalibrationofthreeaxismagnetometeranditsresearchsituationfroma
5、broadtoourcountryareintroduced.Secondly,themechanismsoferrorsareanalyzed,ameasurementmodelofthemagneticfieldvectorandacalibrationmodelaregivenconsideringitsownerrors,NonlinearLeastSquaresmethodisproposedtocalibratethemagneticfieldvector,throughthesimulati
6、onandfieldexperimentstofurthervalidatethefeasibilityandeffectivenessofcalibrationmodelandNonlinearLeastSquaresalgorithm.Thirdly,ameasurementmodelofthetotalmagneticfieldandacalibrationmodelaregivenconsideringitsownerrorsandexternalinterferences,throughsimp
7、lification,consolidation,theobjectivefunctionisdeducedandthreedifferentmethodsthataremadeupofextendedKalmanfilter(EKF),ParticleSwarmOptimization(PSO)andGlobalArtificialFishSwarmAlgorithm(GAFSA)areutilized.Inordertoverifythefeasibilityandeffectivenessofthe
8、calibrationmodelandthreealgorithms,simulationandfieldexperimentsaredesignedcarefully.Bycomparingtheresultsofdifferentcalibrationalgorithms,ascanbeenseenthatGAFSAhasthebestaccuracyandEKFisthefastestspeedandthebestrea
