直流电机模型参数的直接辨识

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1、DirectIentifcationofDCElectromotorModelParameterZHOURu—xun，ZHANGZe—long，QIYingchuan(DepartmentofElectronicWarfare，AirForceRadarAcademy，WuhanHubei430019，China)ABSTRACT：HowtoworkoutthemathematicmodelofDCelectromotorisveryimportanttodesignaDCadjustedvelocitysystem．T

2、heparametererroroftheDCelectromotormodelworkedoutbytraditionalmethodisbig，andtheinlineparameteridentificationcan’tbeacquiredbytraditionalmethod．InordertoworkoutthemodelparameterofDCelectromotor，thispapergivesadirectidentificationarithmeticwhichisusedtoworkoutDCel

3、ectromotormathematicmode1．Takinganelectromotorasexample，theelectromotormodelparameteranditsstepresponseCurveareworkedoutbytraditionalmethodandthedirectidentificationarithmeticrespectively．Throughthecomparisonofthetwosimulationresults，itisprovedthatthedirectidenti

4、ficationarithmeticisfeasibleandtheaccuracyofthemodelisimprovedclearly．KEYWORDS：Directidentification：Directcurrentelectromotor；Transferfunction1.IntroductionInhigh-precisionDCservosystemsandDCspeedcontrolsystem,DCmotorcomponentsareinawiderangeofapplicationsasexecu

5、tiveones.ThedesignofthesystemdependsonthemodelparameterscalculationresultsoftheDCmotor.ThemathematicalmodelofDCmotorfromitstwoequations:electricalequationandmechanicalpropertiesequation.Intheconditionofknowingtheparameters,wecangetmodelparametersofthemotor.Thetra

6、ditionalmethodisusingempiricalformulasandexperimentalmethodforstaticparameters,butusuallymodelerrorsandcannotobtaintheonlineparameteridentification.Thispapergivesthedirectidentificationalgorithm,usingdirectidentificationalgorithmandtraditionalmethodrespectivelywo

7、ntheparametersforthemodeloftheDCmotor,andthenthecomparativesimulation,throughcomparing,itcanbeprovedthatthedirectidentificationalgorithmcaneasilyandeffectivelyobtainDCmotortransferfunctionmodelonlineorofflineways.AnditcangaintnetransferfunctionmodelofDCmotormorea

8、ccuratethanthetraditionalmethods.2.ThedirectidentificationprincipleofDCmotormodelTheelectricalequationandmechanicalequationsofDCmotorisasfollowing.(1)(2)inthea