View/Open - 東京農工大学学術機関リポジトリ 6b86a19a
HHHHHHHHHHHHHHIHHHHHHHHHHHHHHHHHHHHHHHHHTitleStudyonstructureOfhydraulicactiveenginemountandactivecontrolmethodAuthorsCitatonIssueDate20100325URLhttphdlhandleney10636146ThesisorDissertationTextversionETDStudyonStructureofHydraulicActiveEngineMountandActiveControlMethodBE222StudyonStructureofHydraulicActiveEngineMountandActiveControlMethodAbstractTodateconventionalactiveenginemountshavebeenappliedtodieselpassengercarsrecreationalvehiclestoreduceidlevibrationHowevertheyhavenotbeenusedfortruckenginesTheauthorshavedevelopedanewtypeofactiveenginemountsystembasedontheuseofavoicecoilmotorthebellowsandanaccumulatorThevoicecoilisadjacenttoapermanentmagnetthatislocatedinthecaseTheoilpressureinsidethehydraulicactivemountsupportstheengineloadThisconfigurationforthemounthastheadvantageofbeingabletosupporttheloadwithoutanyexternalpowersourcesThepistonwithanactuatorislocatedbetweentheupperandlowerchambersThisresultsinequalpressureactingontheupperandthelowersidesofthevoicecoilmotorconsequenceofthisdesignisthatthesystemrequiresareducedcurrentconsumptionTheLMSLeastMeanSquaresalgorithmhasbeenusedforanactivecontrolinthepastorinotherapplicationsButitcanonlyreducethefirstandsecondfiringorderinordertoreduceboomingnoiseTheauthorsdevelopedthenewmethodbymeansofmodifyingtheLMSalgorithminordertoreducewidefrequencybandforcomfortablevehicleinteriorspaceThiscontrolmethodandthehydraulicactiveenginemountwereappliedtoavehicleItwasobtainedthattheinteriornoisetheseatrailvibrationlevelandthetransmittedforcebetweenthemountandtheframewerereducedinthefrequencydomainofnotonlythefirstfiringorderbutalsooverawidefrequencybandfrom200to500HzThefinaldesignhasbeenshowntosupportaheavyloadandtoreducethetransmittedforcessignificantlywhilehavingarelativelysmallelectricalpowerconsumption11112413614
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