GMW 14480-2005 Generator Sound Power - Component Evaluation Procedure

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1、WORLDWIDETestProcedureENGINEERINGGMW14480NoiseandVibrationSTANDARDSGeneratorSoundPower-ComponentEvaluationProcedure1Scope3ResourcesNote:Nothinginthespecificationsupersedes3.1Facilities.applicablelawsandregulationsunlessspecificSemi-anechoictestcellmeetingrequirementsexemptionhasbeenobtained

2、.definedinISO3745orISO3744standards.Note:IntheeventofconflictbetweentheEnglish3.2Equipment.anddomesticlanguage,theEnglishlanguageshall3.2.1GeneratorTachometer.Aninstrumentgradetakeprecedence.tachometersignalprobe,suchasanopticaltacho1.1Purpose.Definethemethodofquantifyingpickup,capableofpro

3、vidinga1pulsepersoundpoweremittedbythegeneratorwhenrevolutionsignalisrequired.measuredatacomponentlevel.Theproductof3.2.2MicrophoneArray.Microphoneandarraythisprocedurewillbeasetofsoundpower-12requirementsaredefinedinISO3744andISOmeasuresindBmagnitude(ref10W).3745soundpowerstandards.Thepref

4、erred1.2Foreword.Thesoundpowerofacomponentishemisphericalarraycontains19microphonesataoneofthefactorsaffectingairbornenoiseand1meterradiusoverareflectingplaneasdefinedincorrelatestonoiselevelsinthepassengerFigures1and2.compartment.3.2.3DataAcquisitionEquipment.Multi-channel1.3Applicability.

5、Thistestprocedureisdataacquisitionhardwarecapableofcalculatingappropriateforallmotordrivenelectro-mechanicalfrequencydomainresultsbetween0anddevicesusedinvehiclestosupplytheelectrical11.25kHz,withafrequencyresolutionbetween2systemwithelectricenergyandtorechargetheand4Hz,andaminimumdynamicra

6、ngeof80dBbattery.isrequired.Thishardwareshallmeetclass12ReferencesaccuracycorrespondingtoIEC651orbeNote:Onlythelatestapprovedstandardsareequivalentfortheapplication(precision±0.7dBorapplicableunlessotherwisespecified.±8%).2.1ExternalStandards/Specifications.3.2.4LoadBank.Adevicecapableofcon

7、trollingtheelectronicloadappliedtothegenerator.ANSIS1.11ISO3744ReferenceTransistorDevicesInc.,DynaloadANSIS1.34ISO3745modelDLVP-100-300-3000.ANSIS1.35JISZ87323.3TestVehicle/TestPiece.OnegeneratorDIN45652JISZ8733representingthedesignundertestisrequired.IE