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《閥用超磁致伸縮致動(dòng)器弓張結(jié)構(gòu)靜、動(dòng)態(tài)建模與優(yōu)化》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在工程資料-天天文庫。
1、2018年9月農(nóng)業(yè)機(jī)械學(xué)報(bào)第49卷第9期doi:10.6041/j.issn.1000鄄1298.2018.09.047閥用超磁致伸縮致動(dòng)器弓張結(jié)構(gòu)靜、動(dòng)態(tài)建模與優(yōu)化何忠波搖鄭佳偉搖薛光明搖榮搖策搖柏?fù)u果(陸軍工程大學(xué)石家莊校區(qū)車輛與電氣工程系,石家莊050003)摘要:為滿足大流量超磁致伸縮電液伺服閥的驅(qū)動(dòng)需要,設(shè)計(jì)了一種結(jié)構(gòu)緊湊的弓張放大式超磁致伸縮致動(dòng)器;基于力學(xué)基本原理和振動(dòng)理論知識(shí)建立了弓張結(jié)構(gòu)的靜、動(dòng)態(tài)模型;分析了弓張結(jié)構(gòu)尺寸參數(shù)對其靜、動(dòng)態(tài)性能的影響;結(jié)合弓張放大式超磁致伸縮致動(dòng)器應(yīng)用于電液伺服閥的要求,利用多目標(biāo)優(yōu)化法確定了其結(jié)構(gòu)尺寸最佳參數(shù)值,并利用有
2、限元法對其靜、動(dòng)態(tài)模型進(jìn)行了驗(yàn)證;設(shè)計(jì)了弓張放大式超磁致伸縮致動(dòng)器樣機(jī),搭建了實(shí)驗(yàn)系統(tǒng),并進(jìn)行了靜、動(dòng)態(tài)實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果表明,弓張結(jié)構(gòu)的放大倍數(shù)在8郾13~8郾72間波動(dòng),輸出端最大位移可達(dá)107郾9滋m,固有頻率約為168Hz,測試所得結(jié)果與其靜、動(dòng)態(tài)模型計(jì)算值基本吻合;通過與優(yōu)化前的性能相比,弓張結(jié)構(gòu)的靜態(tài)放大倍數(shù)在滿足要求的條件下,其動(dòng)態(tài)固有頻率提高了55郾6%;所設(shè)計(jì)的弓張放大式超磁致伸縮致動(dòng)器基本上能夠滿足伺服閥的驅(qū)動(dòng)要求,證明了該優(yōu)化設(shè)計(jì)方法的有效性。關(guān)鍵詞:超磁致伸縮材料;弓張結(jié)構(gòu);致動(dòng)器;優(yōu)化設(shè)計(jì);伺服閥中圖分類號(hào):TH703郾2文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1
3、000鄄1298(2018)09鄄0397鄄09StaticandDynamicPropertyOptimizationDesignonBow鄄typeStructureofGiantMagnetostrictiveActuatorforValveHEZhongbo搖ZHENGJiawei搖XUEGuangming搖RONGCe搖BAIGuo(DepartmentofVehicleandElectricalEngineering,ShijiazhuangCampus,ArmyEngineeringUniversity,Shijiazhuang050003,China)A
4、bstract:Acompactgiantmagnetostrictiveactuatorwithbow鄄typeamplifierstructurewasdesignedtomeetthedrivingneedsoflarge鄄flowelectro鄄hydraulicservovalve.Basedonmechanicsandvibrationtheory,thestaticanddynamicmodelsofthisstructurewereestablished.Theinfluenceofthedimensionalparameterstowardsitsst
5、aticanddynamicperformancewasanalyzed,anditwasconcludedthatitsstaticanddynamicpropertiesweremutuallyrestrictive.Combiningwiththeapplicationrequirementsofgiantmagnetostrictiveactuatorinelectro鄄hydraulicservovalve,themulti鄄objectiveoptimizationdesignwasconductedforthebow鄄typestructure,andth
6、enthestaticanddynamicmodelswerevalidatedbythefiniteelementanalysis.Finally,thegiantmagnetostrictiveactuatorwithbow鄄typedisplacementamplifierstructurewasprototypedtotestitsstaticanddynamicproperties.Theresultsshowedthattheamplificationratioofthisstructurewasfluctuatedfrom8郾13to8郾72,themax
7、imumoutputdisplacementwas107郾9滋m,andthenaturalfrequencyreached168Hz.Theresultswerebasicallyinconsistentwiththetheoreticalmodels.Comparedwiththeperformancebeforeoptimization,thenaturalfrequencywasincreasedby55郾6%whentherequirementofthestaticmagnificationwasmet.Theactuatord
