简介：ＢＳｐｌｉｎｅＩｎｔｅｒｐｏｌａｔｉｏｎＢａｓｅｄｏｎＯｐｔｉｍｉｚａｔｉｏｎ①ＤｅｊｕｎＳｏｎｇＸｉｎｘｉｏｎｇＺｈｕＤｅｐａｒｔｍｅｎｔｏｆＭａｎｕｆａｃｔｕｒｉｎｇＥｎｇｉｎｅｅｒｉｎｇＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＡｅｒｏｎａｕｔｉｃ...

简介：Partorientationisoneoftheimportantfactorsinmanufacturingwiththreedimensionalprinting(3DP)ofrapidprototypingsystem.Theminimumbuildingtime,beingachievedbythepart’sminimumbuildingheightandminimumwidthin3DP’sydirection,issetastheobjectiveofoptimizingthepartorientation.Geneticalgorithmisadoptedtofindtheminimumbuildingheightofpartsandthenergodicsearchingisusedtogettheminimumwidthofpartinydirection.Acorrespondingprogramforoptimizingpartorientationin3DPwasdeveloped.Testsshowtheproposedapproachiseffectiveandfast.

简介：

简介：

简介：ＡＧｅｏｍｅｔｒｉｃＲｅｐｒｅｓｅｎｔａｔｉｏｎＳｃｈｅｍｅＳｕｉｔａｂｌｅｆｏｒＳｈａｐｅＯｐｔｉｍｉｚａｔｉｏｎＷａｎｇＸｕｅｌｉｎａｎｄＺｈｏｕＪｉＣＡＤＣｅｎｔｅｒ，ＨｕａｚｈｏｎｇＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏ...

简介：

简介：Twosystemoptimizationarchitecturesareproposedformissilesystempreliminarydesign,takingintoaccountaerodynamics,weightsandsizing,propulsionandtrajectory.Approximationmethodsareinvestigatedinordertoreduceproblemdimensionalityandtoimprovetheefficiencyofoptimizationprocess.

简介：

简介：Theproblemofrobustdesignistreatedasamulti-objectiveoptimizationissueinwhichtheperformancemeanandvariationareoptimizedandminimizedrespectively,whilemaintainingthefeasibilityofdesignconstraintsunderuncertainty.Toeffectivelyaddressthisissueinrobustdesign,thispaperpresentsanovelrobustoptimizationapproachwhichintegratesmulti-objectiveoptimizationconceptswithTaguchi'scrossedarraystechniques.Inthisapproach,Pareto-optimalrobustdesignsolutionsetsareobtainedwiththeaidofdesignofexperimentset-ups,whichutilizetheresultsofAnalysisofVariancetoquantifyrelativedominanceandsignificanceofdesignvariables.Abeamdesignproblemisusedtoillustratetheeffectivenessoftheproposedapproach.

简介：

简介：Amethodologyisimplementedtofindtheoptimumreducedweightconfigurationdesignofanoperatingstructureofacivilaircraftverticaltailfin.FE(finiteelement)basedtopologyoptimizationisexecutedtofindtheoptimummaterialdistributionofinitialdesignspaceofribbymaximizingthestiffness.Loadspertinenttotheoperatingandgroundconditionsareestimatedandapplied,consideringtheorientationofstructuralassemblymembersandbuilt-insupportsofferedinthemainstructure.Manufacturingconstraintsareincorporatedintotheoptimizationlooptogeneratepragmaticandmanufacturabledesignconfiguration.ThetopologicallyoptimizedconfigurationisthenconvertedtoCADviabledesignthroughdatareductionandsmoothingbyconvertingtoISO-surfaces.Amethodologyisalsodevisedtomodifythetopologicaloptimizedvoidsandmateriallayoutpreciselywithsplinesandfilletstoconstructmanufacturablefeaturesandavoidstressconcentrations.Theresultingnoveldesignproposalisthenanalyzedandvalidatedagainststipulatedloads,constraintsandotherdesignneeds.Resultsvalidatethenewdesignproposalasmorereliable,havingreducedweightandenhancedstructuralperformance.

简介：Pathplanningin3Dgeometryspaceisusedtofindanoptimalpathintherestrictedenvironment,accordingtoacertainevaluationcriteria.Tosolvetheproblemoflongsearchingtimeandslowsolvingspeedin3Dpathplanning,amodifiedantcolonyoptimizationisproposedinthispaper.Firstly,thegridmethodforenvironmentmodelingisadopted.Heuristicinformationisconnectedwiththeplanningspace.Asemi-iterativeglobalpheromoneupdatemechanismisproposed.Secondly,theoptimalantsmutatethepathstoimprovethediversityofthealgorithmafteradefinediterativenumber.Thirdly,co-evolutionaryalgorithmisused.Finally,thesimulationresultshowstheeffectivenessoftheproposedalgorithminsolvingtheproblemof3Dpipepathplanning.

简介：

简介：

简介：

简介：

简介：

简介：ThedesignofnewSatelliteLaunchVehicle(SLV)isofinterest,especiallywhenacombinationofSolidandLiquidPropulsionisincluded.ProposedisaconceptualdesignandoptimizationtechniqueformultistageLowEarthOrbit(LEO)boundSLVcomprisingofsolidandliquidstageswiththeuseofGeneticAlgorithm(GA)asglobaloptimizer.ConvergenceofGAisimprovedbyintroducinginitialpopulationbasedontheDesignofExperiments(DOE)Technique.LatinHypercubeSampling(LHS)-DOEisusedforitsgoodspacefillingproperties.LHSisastratifiedrandomprocedurethatprovidesanefficientwayofsamplingvariablesfromtheirmultivariatedistributions.InSLVdesignminimumGrossLiftoffWeight(GLOW)conceptistraditionallybeingsought.SincethedevelopmentcoststendtovaryasafunctionofGLOW,thisminimumGLOWisconsideredasaminimumdevelopmentcostconcept.Thedesignapproachismeaningfultoinitialdesignsizingpurposeforitscomputationalefficiencygivesaquickinsightintothevehicleperformancepriortodetaileddesign.

简介：

简介：Disassemblysequenceplanningisanimportantstepofmechanicalmaintenance.Thisarticlepresentsanintegratedstudyaboutthegenerationandoptimizingalgorithmofthedisassemblysequence.Mechanicalproductsaredividedintotwocategoriesofcomponentsandconnectors.Thearticleusescomponent-jointgraphtorepresentassemblyconstraints,includingtheincidenceconstraintsarerepresentedbyincidencematrixandtheinterferenceconstraintsarerepresentedbyinterferenceconstraints.Theinspiringfactorandpheromonematrixarecalculatedaccordingtoassemblyconstraints.Thentheantgeneratesitsowndisassemblysequencesonebyoneandupdatestheinspiringfactorandpheromonematrix.Afteralliterations,thebestdisassemblysequenceplanningofcomponentsandconnectorsaregiven.Finally,anapplicationinstanceofthedisassemblysequenceofthejackispresentedtoillustratethevalidityofthismethod.