简介：Flexiblesupercapacitorsshowagreatpotentialforapplicationsinwearable,miniaturized,portable,largescaletransparentandflexibleconsumerelectronicsduetotheirsignificant,inherentadvantages,suchasbeingflexible,lightweight,lowcostandenvironmentallyfriendlyincomparisonwiththecurrentenergystoragedevices.Inthisreport,recentprogressonflexiblesupercapacitors,flexibleelectrodesandelectrolytesisreviewed.Inaddition,thefuturechallengesandopportunitiesarediscussed.

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简介：Thepotentialforharvestingenergyfromaflexibledeltawingusingapiezoelectricbimorphisexperimentallyinvestigated.Differentconfigurationsoftheproposedharvestingsystemweretestedinawindtunneloverabroadrangeofairspeeds.Inadditiontoevaluatingthelevelofharvestedpower,ananalysisisperformedtoextractcriticalaspectsfortherelationbetweenspeed,flexibility,geometryandthepotentialpowerthatcanbeharvestedfromaclamped,cantileveredflexibledeltawingatlowanglesofattackandlowspeeds.Thisanalysisprovidesaninsightintoparametersthatimpactenergyharvestingfromflexiblemembranesorelements.

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简介：Hamiltonianstructureofarigidbodyinacircularorbitisestablishedinthispaper.Withthereductiontechnique,theHamiltonianstructureofarigidbodyinacircularorbitisderivedfromLie-Poissonstructureofsemidirectproduct,andHamiltonianisderivedfromJacobi’sintegral.TheabovemethodcanbegeneralizedtoestablishtheHamiltonianstructureofarigidbodywithaflexibleattachmentinacircularor-bit.Atlast,anexampleofstabilityanalysisisgiven.

简介：Recently,someresearchesindicatethatpositivefeedbackcanbenefitthecontrolifappropriatetimedelayisintentionallyintroducedintocontrolsystem.However,mostworkistheoreticalonebutfewareexperimental.Thispaperpresentstheoreticalandexperimentalstudiesofdelayedpositivefeedbackcontroltechniqueusingaflexiblebeamasresearchobject.Thepositivefeedbackweightingcoefficientisdesignedbyusingtheoptimalcontrolmethod.Theavailabletimedelayisdeterminedbyanalyzing...

简介：Thispaperdevelopsgeometricnonlinearhybridformulationforflexiblemultibodysystemwithlargedeformationconsideringthermalefect.Diferentfromtheconventionalformulation,theheatfluxisthefunctionoftherotationalangleandtheelasticdeformation,therefore,thecouplingamongthetemperature,thelargeoverallmotionandtheelasticdeformationshouldbetakenintoaccount.Firstly,basedonnonlinearstrain–displacementrelationship,variationaldynamicequationsandheatconductionequationsforaflexiblebeamarederivedbyusingvirtualworkapproach,andthen,LagrangedynamicsequationsandheatconductionequationsofthefirstkindoftheflexiblemultibodysystemareobtainedbyleadingintothevectorsofLagrangemultiplierassociatedwithkinematicandtemperatureconstraintequations.Thisformulationisusedtosimulatethethermalincludedhub-beamsystem.Comparisonoftheresponsebetweenthecoupledsystemandtheuncoupledsystemhasrevealedthethermalchatteringphenomenon.Then,thekeyparametersforstability,includingthemomentofinertiaofthecentralbody,theincidentangle,thedampingratioandtheresponsetimeratio,areanalyzed.Thisformulationisalsousedtosimulateathree-linksystemappliedwithheatflux.Comparisonoftheresultsobtainedbytheproposedformulationwiththoseobtainedbytheapproximatenonlinearmodelandthelinearmodelshowsthesignificanceofconsideringallthenonlineartermsinthestrainincaseoflargedeformation.Atlast,applicabilityoftheapproximatenonlinearmodelandthelinearmodelareclarifiedindetail.

简介：这份报纸主要担心联合由一个主要僵硬平台，多重充满液体的圆柱的坦克，和很多个灵活附器组成的一只复杂太空船的动态分析。第一，在坦克的液体的搬运人潜力功能方程根据墙边界条件被推出。通过采用FourierBessel系列扩大方法，动态边界条件在上一弯在低严肃的环境下面免费表面被转变到一般简单微分方程和僵硬液体的联合sloshing在坦克的液体的动态州的方程被获得。僵硬液体的联合方程的州的向量与相对潜在的功能的形式的坐标和波浪高度的形式的坐标被填写。基于BernoulliEuler横梁理论和DAlemberts原则，灵活附器的僵硬灵活的联合动态州的方程直接被导出，并且调遣灵活附器的并列变换矩阵精确作为变化时间被计算。然后，太空船的全面系统的联合动力学状态方程模块化地以伪坐标借助于Lagranges方程被造。最后，联合一只典型复杂太空船的动态表演被学习。介绍方法的可获得性和可靠性也被证实。图形的摘要

简介：活跃的腱，由一个排水量致动器和一个并置的力量传感器组成，被Preumont和他的同事首先介绍稀释大灵活空间结构，和他们采用的控制算法的颤动是不可分的力量反馈。这篇论文论述一新比例积分(PI)强迫反馈算法完成更大的抑制为没有结构的要求的结构的比率当模特儿。控制系统的稳定性被显示出，并且类似于JPL-MPI的结构的模拟为空格结构的颤动控制表明建议算法的有效性。

简介：Thepropulsiveperformanceoftwo-andthree-dimensional(2Dand3D)flappingflexibleplatesinafluidatrestisinvestigatedbyafiniteelementmethodfortheplatemotionandanimmersedboundary-latticeBoltzmannmethodforthefluidflow.Weconsideramodelthatastheleading-edgeoftheplatetakesaverticaloscillation,theentireplatemovesfreelyduetothefluid-structureinteraction.Theeffectsofflexibilityonthedynamicsofthe2Dand3Dflappingplatesareinvestigated.Itisfoundthatasuitableflexibilityisbenefitforimprovingthepropulsiveperformance.Theresultsobtainedinthisstudyprovidephysicalinsightintotheunderstandingofthedynamicsoftheflapping-basedlocomotion.

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简介：有由动量车轮的一根伸臂横梁被学习的一个附器的充满液体的太空船的态度演习。动态方程被尖动量和力量平衡原则的保存导出。动量车轮的反馈控制策略被申请态度演习。在演习过程的太空船的剩余点头随着一些选择参数变化，例如稳定的州的时间，液体容器的地点和附器，并且附器参数。结果显示在修理身体的坐标系统的第二和第四个象限和主要身体的墙的第二个象限的地点是为如果他们能随机被放，把液体集装箱和附器放比另外的地点的更好的选择。更高的密度和更厚的生气的节对如果他们能被改变，降低剩余点头更好。轻附器能作为僵硬身体被建模，它不过比一个灵活模型导致一个更大的剩余点头。剩余点头与增加起始的sloshing的绝对值减少尖高度。

简介：Hardwareintheloopsimulation(HILS)hasbeeninvestigatedinthefieldofthemultibodydynamics(MBD),whichcombinedtheMBDsimulationwiththeactualmechanicalsystem.ThefastsimulationisnecessaryfortheHILSsysteminordertorequiretherealtimesimulation.Thispaperpresentsafastsimulationtechniqueusingthedomaindecompositionmethodwiththeiterationintheflexiblemultibodysysteminwhichflexiblelinkagesystemandelectro-hydraulicdrivesystemarecoupledwitheachother.

简介：Rotatingdisksubjectedtostationarysliderloadingsystemisaverycommonmechanicalstructure.Thispaperinvestigatesthemultibodydynamicsofarotatingflexibleannularthindisksubjectedtodoublesliderloadingsystems.Alongtherotatingdiskradialandcircumferentialdirections,twostationarysliderloadingsystemsaredistributed.SystemdynamicmodelissolvedbyGalerkin'smethod,andthennaturalfrequency,dynamicstabilityandmodeshapearedeterminedwithaquadraticeigenvalueproblem.Effectsofthedistributingpositionsandinteractionmechanismofthedoublesliderloadingsystemsonnaturalfrequency,dynamicstabilityandmodeshapearediscussedandinvestigated.

简介：Theobjectiveofthisinvestigationistoexaminethecorrectnessandefficiencyofthechoiceofboundaryconditionswhenusingassumedmodeapproachtosimulateflexiblemulti-bodysystems.ThedisplacementfieldduetodeformationisapproximatedbytheRayleigh-Ritzassumedmodesinfloatingframeofreference(FFR)formulation.Thedeformationsobtainedbytheabsolutenodalcoordinate(ANC)formulationwhicharetransformedbytwosetsofreferencecoordinatesareintroducedasacriteriontoverifytheaccuracyofthesimulationresultsbyusingtheFFRformulation.Therelationshipbetweenthedeformationsobtainedfromdifferentboundaryconditionsisrevealed.Numericalsimulationexamplesdemonstratethattheassumedmodeswithcantilevered-free,simply-supportedandfreefreeboundaryconditionswithoutinclusionofrigidbodymodesaresuitableforsimulationofflexiblemulti-bodysystemwithlargeoverallmotion,andthesamephysicaldeformationcanbeobtainedusingthosemodefunctions,differonlybyacoordinatetransformation.Itisalsoshownthatwhenusingmodeshapeswithstaticallyindeterminateboundaryconditions,significanterrormayoccur.Furthermore,theslidercrankmechanismwithrigidcrankisaccurateenoughforinvestigatingboundaryconditionproblemofflexiblemulti-bodysystem,whichcostsignificantlesssimulatingtime.

简介：Thepresentpaperinvestigatesthechaoticattitudedynamicsandreorientationmaneuverforcompletelyvis-cousliquid-filledspacecraftwithflexibleappendage.AlloftheequationsofmotionarederivedbyusingLagrangianmechanicsandthentransformedintoaformconsistingofanunperturbedpartplusperturbedtermssothatthesystem'snonlinearcharacteristicscanbeexploitedinphasespace.Emphasesarelaidonthechaoticattitudedynamicsproducedfromcertainsetsofphysicalparametervaluesofthespace-craftwhenenergydissipationactstoderivethebodyfromminortomajoraxisspin.Numericalsolutionsoftheseequa-tionsshowthattheattitudedynamicsofliquid-filledflexiblespacecraftpossessescharacteristicscommontorandom,non-periodicsolutionsandchaos,anditisdemonstratedthatthedesiredreorientationmaneuverisguaranteedbyusingapairofthrusterimpulses.Thecontrolstrategyforreorientationmaneuverisdesignedandthenumericalsimulationresultsarepresentedforboththeuncontrolledandcontrolledspinstransition.

简介：Theactivecontrolofvibrationforabeamsubjectedtomulti-disturbancesisinvestigatedbasedonwavepropagatingsuppression.Inthiscontrolsystem,therearethesamenumbersofthesensors,thesignalinputtingtothecon-trollerandthedisturbances,butthereisonlyonecontroller.Itisalocalcontrolsystem,thesystemparametersdependonlyonthecharacteristicsofthestructureboundedbythesensorsandthecontroller,andweneednottakeintoaccounttheboundaryconditionsandthepropertiesofstructuresoutsideofthisfield.Thesys-temisefficientwhenastructurevibratesinmiddleandhighfrequencyregions.Somecontroldesignrulesaredevelopedfromthecalculationresults.

简介：Thispaperisconcernedwiththedynamicsofaspacecraftwithmulti-strutpassivedamperforlargeflexibleappendage.Thedamperplatformisconnectedtothespacecraftbyaspherichinge,multipledampingstrutsandarigidstrut.Thedampingstrutsprovidedampingforceswhiletherigidstrutproducesamotionconstraintofthemultibodysystem.TheexactnonlineardynamicalequationsinreducedorderformarefirstlyderivedbyusingKane＇sequationinmatrixform.Basedontheassumptionsofsmallvelocityandsmalldisplacement,thenonlinearequationsarereducedtoasetoflinearsecond-orderdifferentialequationsintermsofindependentgeneralizeddisplacementswithconstantstiffnessmatrixanddampingmatrixrelatedtothedampingstrutparameters.Numericalsimulationresultsdemonstratethedampingeffectivenessofthedamperforboththemotionofthespacecraftandthevibrationoftheflexibleappendage,andverifytheaccuracyofthelinearequationsagainsttheexactnonlinearones.

简介：模仿实验室元素测试的分离元素方法(DEM)模型在推进我们小粒的材料反应的力学的理解起一个重要作用，包括结合或cemented，微粒材料。在真实物理测试和一个虚拟模仿DEM的测试罐头观察的宏规模反应的比较校准或验证DEM模型。详细说明，在DEM模拟提供的粒子规模信息然后能被用来开发我们材料行为的理解。精确地在这些DEM模拟为物理测试边界条件建模是重要的。这份报纸明确地认为这些测试通常在土壤被使用的triaxial测试是力学。在triaxial测试，小粒的材料的测试标本在允许材料在测试期间自由地使变形的灵活乳胶膜以内被围住，当维持一个指定压力条件时。Triaxial测试能写实地仅仅在3DDEM代码被模仿，然而类似物，2D，因为在二种尺寸设想粒子相互作用更容易，biaxialDEM模拟经常也被考虑。这份报纸描述算法模仿在2D和3DDEM模拟的物理triaxial测试使用的乳胶膜强加的侧面的边界条件。小心地在DEM模拟考虑侧面的边界条件的重要性被在摩擦unbonded磁盘和3Dtriaxial测试的一个标本上考虑2Dbiaxial测试在上说明一结合(cemented)范围的标本。比较显示侧面的边界条件在本地人，上有更重要的影响与全面宏规模观察比较的粒子规模反应。

简介：Inthepresentresearchtwodifferentwholevehiclemultibodymodelsareestablishedrespectively,includingrigidandrigid-flexiblecouplingmultibodyvehiclemodels.Theformerisallcomposedbyrigidbodieswhileinthelatermodel,theflexiblerearsuspensionisbuiltbasedonthefiniteelementmethod(FEM)andmodesuperpositionmethod,inwhichthedeformationsofthecomponentsareconsidered.Theridesimulationswithdifferentspeedsarecarriedoutona3Ddigitalizedroad,andtheweightedrootmeansquare(RMS)ofaccelerationsontheseatsurface,backrestandatthefeetarecalculated.Thecomparisonbetweentheresponsesoftherigidandrigid-flexiblecouplingmultibodymodelsshowsthattheflexibilityofthevehiclepartssignificantlyaffectstheaccelerationsateachposition,anditisnecessarytotaketheflexibilityeffectsintoaccountfortheassessmentofridecomfort.更多还原