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简介:Navigationsystembasedontheanimalbehaviorhasreceivedagrowingattentioninthepastfewyears.Thenavigationsystemsusingartificialpheromonearestillfewsofar.Forthisreason,thispaperpresentsourresearchthataimtoimplementautonomousnavigationwithartificialpheromonesystem.Byintroducingartificialpheromonesystemcomposedofdatacarriersandautonomousrobots,theroboticsystemcreatesapotentialfieldtonavigatetheirgroup.Wehavedevelopedapheromonedensitymodeltorealizethefunctionofpheromoneswiththehelpofdatacarriers.Weintendtoshowtheeffectivenessoftheproposedsystembyperformingsimulationsandrealizationusingmodifiedmobilerobot.Thepheromonepotentialfieldsystemcanbeusedfornavigationofautonomousrobots.
简介:Thispaperproposedanovelhumanoidroboteye,whichisdrivenbysixPneumaticArtificialMuscles(PAMs)androtateswith3DegreeofFreedom(DOF).Thedesignofthemechanismandmotiontypeoftheroboteyeareinspiredbythatofhumaneyes.Themodelofhumanoidroboteyeisestablishedasaparallelmechanism,andtheinverse-kinematicproblemofthisflexibletendonsdrivingparallelsystemissolvedbytheanalyticalgeometrymethod.Asanextension,thesimulationresultforsaccadicmovementispresentedunderthreeconditions.Thedesignandkinematicanalysisoftheprototypecouldbeasignificantsteptowardsthegoalofbuildinganautonomoushumanoidroboteyewiththemovementandespeciallythevisualfunctionssimilartothatofhuman.
简介:Thispaperaddressesthedesignofabiomimeticfishrobotactuatedbypiezoceramicactuatorsandtheeffectofartificialcaudalfinsonthefishrobot'sperformance.Thelimitedbendingdisplacementproducedbyalightweightpiezocompositeactuatorwasamplifiedandtransformedintoalargetailbeatmotionbymeansofalinkagesystem.Caudalfinsthatmimictheshapeofamackerelfinwerefabricatedforthepurposeofexaminingtheeffectofcaudalfincharacteristicsonthrustpro-ductionatanoperatingfrequencyrange.Thethicknessdistributionofarealmackerel'sfinwasmeasuredandusedtodesignartificialcaudalfins.ThethrustperformanceofthebiomimeticfishrobotpropelledbyfinsofvariousthicknesseswasexaminedintermsoftheStrouhalnumber,theFroudenumber,theReynoldsnumber,andthepowerconsumption.Forthesamefinareaandaspectratio,anartificialcaudalfinwithadistributedthicknessshowsthebestforwardspeedandtheleastpowercon-sumption.
简介:Wepresentarapidsystemforpredictingbeeftendernessbymimickingthehumantactilesense.ThedetectionsystemincludesaFSpressuresensor,apowersupplyconversioncircuit,asignalamplifierandaboxinwhichthesampleismounted.AsampleofrawLongissimusdorsi(LD)muscleisplacedinthemeasuringbox;thenarodconnectedtothepressuresensorispressedintothebeefsampletoagivendepth;thereactionforceofthebeefsampleismeasuredandusedtopredictthetenderness.SensoryevaluationandWarner-BratzlerShearForce(WBSF)evaluationofsamplesfromthesameLDmuscleareusedforcomparison.Thenewdetectionsystemagreeswithestablishedprocedure95%ofthetime,andthetimetotestasampleislessthan5minutes.
简介:Inanattempttorealizeaflappingwingmicro-airvehiclewithmorphingwings,wereportonimprovementstoourpreviousfoldableartificialhindwing.Multiplehinges,whichwereimplementedtomimicthebendingzoneofabeetlehindwing,weremadeofsmallcompositehingeplatesandtinyaluminumrivets.Thebuck-tailsofrivetswereflaredafterthehingeplateswereassembledwiththerivetssothatthefolding/unfoldingmotionscouldbecompletedinlesstime,andthestraightshapeoftheartificialhindwingcouldbemaintainedafterfabrication.Foldingandunfoldingactionsweretriggeredbyelectrically-activatedShapeMemoryAlloy(SMA)wires.Forwingfolding,theactuationcharacteristicsoftheSMAwireactuatorweremodifiedthroughheattreatment.Throughaseriesofflappingtests,weconfirmedthattheartificialwingsdidnotfoldbackandarbitrarilyfluctuateduringtheflappingmotion.
简介:Fourdifferentstructuralmodelsofartificialjointsweredevelopedandthefiniteelementmethod(FEM)wasemployedtoinvestigatetheirmechanicalcharacteristicsunderstaticanddynamicconditions.ThematerialsusedintheFEMcalculationwereultra-highmolecularweightpolyethylene(UHMWPE),316Lstainlesssteel,CoCrMoalloyandTi6Al4Valloy.Thestressdistribution,strain,andelasticdeformationunderstaticanddynamicconditionswereobtained.Analysisandcomparisonofthecalculationresultsofdifferentmodelswereconducted.Itisshownthatwiththesameparametersthemodelofametallicfemurheadcoveredwithanartificialcartilagelayerismoresimilartothestructureofthenaturalhumanjointanditsmechanicalcharacteristicsarethebestofthefourmodels.