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时间:2019-06-28
《Equivalent circuit for broadband underwate transducer英文学习材料》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、IEEETRANSACTIONSONULTRASONICS,FERROELECTRICS,ANDFREQUENCYCONTROL,vol.55,no.9,SEPTEMBER20082079CorrespondenceEquivalentCircuitforBroadbandplications.MarshallandBrigham[5]haveestimatedtheUnderwaterTransducersequivalentcircuitparametersoftransducerswithalowfigureofmerit.Theyhavedetermined4par
2、ametersoftheR.RameshandD.D.Ebenezerequivalentcircuitfromtheanalysisofcapacitancecurve.Sherritetal.[6]haveproposedanequivalentcircuitmodelAbstract—Amethodispresentedtodeterminetheequiva-ofapiezoelectricthickness-modevibratorandestimatedlentcircuitsofbroadbandtransducerswith2resonancesinthet
3、hecircuitparametersfromcomplexmaterialcoefficients.frequencybandofinterest.ThecircuitparametersarerefinedChurchandPincock[7]havedescribedamethodtodeter-byleast-squaresfittingthemeasuredelectricalconductanceminetheequivalentcircuitparametersofsmallacousticdatawiththismodel.Themethodisillust
4、ratedbycomputingtheconductanceandsusceptanceoftheequivalentcircuitsoftransmittersatornearresonance.However,theseanaly-3typesofbroadbandtransducersandcomparingthemwithsesarerestrictedtotransducerswithoneresonanceinthethemeasuredvalues.Theequivalentcircuitofatransducerisoperatingbandofintere
5、st.CoatesandMaguire[8]havenecessaryfordesigningfiltersthatmatchtheimpedancesofderivedapproximateexpressionsofequivalentcircuitpa-thetransducerandthepoweramplifierthatdrivesthetrans-rametersofmultiple-modetransducersfromtheelectricalducer.admittance.Thesedatacouldbeusedasstartingvaluesforsu
6、bsequentiterativerefinement.I.IntroductionInthispaper,anapproachispresentedtodeterminetheequivalentcircuitofbroadbandtransducerswitharoadbandtransducersthathavenearlyflatandBhightransmittingvoltageresponse(TVR)overonenearlyflatTVRand2resonancesintheimpedanceinthebandofinterest.Theequivalen
7、tcircuithaslumpedfre-octaveorevenmorehavebeendevelopedinrecentyearsquency-independentcomponents.Approximateequivalent[1].However,thereisconsiderablevariationintheimped-circuitparametersarefirstestimatedusing7measuredanceofthetransducerinthebandinwhichtheTVRisv
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