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ID:38334724
大小:1.11 MB
页数:18页
时间:2019-06-10
《2 Modeling and Control of Vibration in Mechanical Systems文稿》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、bly,andelectronicscard.cover,spindleandmotorassembly,actuatorassembly,disk,head/suspensionassem-AharddiskdriveasshowninFigure1.1includesfivemajorparts:baseplateand2.2Systemdescriptionanismwiththeerrorsignalastheinput.low-frequencydisturbancesaremodeledastheoutputofanadaptivenonlinearmech-
2、isproposedwhichleadstoapproximatedisturbanceandnoisemodels.Particularly,tionoftheerrorsignalmeasuredinaclosed-loopsystem.Adecouplingprocedurethepositionandthemodelingerror.hysteresis,andanoptimalmodelisobtainedbyminimizingtheenergygainbetweenmentinclosed-loop.Anoperatorbasedmodelingappro
3、achisadoptedtomodeltheThehysteresisoffrictionversusactuatorpositionisthenobtainedfromthemeasure-theconditionthattheactuatoriscontrolledtoavoidunsteadysignalmeasurement.beinvolvedinherently.Moreover,nonlinearityinducedbyfrictionismeasuredundermodel,uncertainties,especiallyduetohighfrequen
4、cyunmodeleddynamics,havetotheparametersofamodelintheformoftransferfunction.Tohaveamorerealisticators.Systemdynamicsmeasurementinthefrequencydomainisusedtodeterminechangesinthephysicalsystem.atanoperatingpoint,findingacontrolstrategythatisrobustandadaptabletothemanyattemptstodealwithaphysi
5、calsystem:approximatingitwithalinearmodelsystemsaremoreorlessnonlinearandmayvarywithtime.Researchershavemadephysicalsystemhastobemodeledinordertodesignacontrolsystem.PhysicalModelingplaysanimportantroleinanycontrolsystemanalysisanddesign.A2.1IntroductionVibrationModelingofDiskDriveSystem
6、andIts2Inthischapter,vibrationmodelingisbasedprimarilyonthespectraldecomposi-Thesystemmodelinginthischapterisdiscussedfromthefirstprincipleofactu-17servoburstinformationiswrittenonthediskcompletely[53][54].Thedefectssuchguidedpush-pinmechanismtopositionthewriteheadonthedisksurfaceuntilthe
7、dedicatedservowritingequipmentexternaltothediskdrive,whichusesalaser-isembeddedineachdisksurface.Servoburstsareconventionallywrclosed-loopsystem.withtheVCMprimaryactuatorisgenerallyusedtoproduceahigherbandwidthoferrorrejectiontransferfunction.Asecondarymicroactuatoractiva
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