基于PM流量控制器的开式液体静压导轨动态特性分析.pdf

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1、HydromechatronicsEngineering机床与液压DOI：10．3969／j．issn．1001—3881．2012．06．006DynamicCharacteristicAnalysisofOpen-typeHydrostaticGuideBasedonPMFlowControllerGAODianrong，ZHANGZuochao，ZHAOJianhua(SchoolofMechanicalEngineering，YanshanUniversity，Qinhuangdao066004，Ch

2、ina)Abstract：Hydrostaticguidesystem，whichisactuallynonlinearsystem，usuallyisconsideredasthelinearsystemwhenthedynamicperformanceisconcerned，however，theerorvialinearizationtransformhasnotbeenanalyzed．Taketheopen—typehydrostaticguideadjustedbyPMflowControlera

3、sanexample，thenonlineardiferentialequationsofthepressureandflowarederived．OnemethodtolinearizethenonlineardiferentialequationsbyLaplacetransformandthecorrespondingtransferfunctionsareobtained，andthestepresponseeurvesandthepulseresponsecurvesarepresentedinth

4、ispaper．TheothermethodforhydrostaticguidesystemistouseSimulinktoolboxtobuildthenonlinearsystemblockdiagramoftheguidesystem．Thecorespondingstepresponseeurvesandthepulseresponsecurvesarepresentedaswel1．Comparingtheresponsecurvesfromthesetwodifferentmethods．th

5、edifferencebetweentheresuhs丑reverysmall，andtheprecisionofthesetwomethodscanmeetthedemandofthepracticalengineeringapplication，andtheline—attreatmentisvalidfortheopen—typehydrostaticslideadjustedbythePMcontroler．Basedonthesemethods，thedy—namicperformanceonthe

6、slideisanalyzed，andtheamplitude—frequencyeurves，thephase—frequencycurves，andthedynamicstiffness—frequencycurvesarepresented．Thepresentstudyprovidesatheoreticalbasisfortheopen—typehy—drostaticslidebasedonPMflowController，andshowsfeasibilityforthepracticaleng

7、ineeringapplications．Keywords：PMflowController，open—typehydrostaticslide，nonlineardifferentialequationssystems，laplacetrans—form，dynamicstiffnessThehydrostaticbearingcanautomaticallyregu-thedynamicperformanceofthehydrostaticbeatinglatethepressureoftheoilpoc

8、ketsinordertoadapttobyusingthefinitediferencemethod；inlitera—thechangeofexternalload．Thedynamicperform—tureE，basedontheSimulinktoolboxofMatlab，theanceofthehydrostaticbearingreferstothedynamicdynamicres