6（2）翻译原文（基于plc控制的物料分拣系统设计）

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1、USINGGENETICALGORITHMSTORESOLVEFACILITYLAYOUTPROBLEMI.Mihajlovic*,Z.Zivkovic,N.Strbac,D.ZivkovicandA.JovanovicUniversityofBelgrade,TechnicalFacultyatBor,VojskeJugoslavije12,19210Bor,Serbia(Received12May2006;accepted23July2006)Abstract:Thecomponentlay

2、outproblemrequiresefficientsearchoflarge,discontinuousspaces.Theefficientlayoutplanningofaproductionsiteisafundamentaltasktoanyprojectundertaking.Thispaperdescribesageneticalgorithm(GA)tosolvetheproblemofoptimalfacilitieslayoutinmanufacturingsystemde

3、signsothatmaterial-handlingcostsareminimized.Theperformanceoftheproposedheuristicistestedoverproblemsselectedfromtheliterature.Computationalresultsindicatethattheproposedapproachgivesbetterresultscomparedtomanyexistingalgorithmsinthisarea.Keywords:fa

4、cilitylayout;flexiblemanufacturing;stochasticprogramming1.INTRODUCTIONComponentlayoutplaysanimportantroleinthedesignandusabilityofmanyengineeringproducts.Thelayoutproblemisalsoclassifiedundertheheadingsofpacking,packaging,configuration,containerstuff

5、ing,palletloadingorspatialarrangementintheliterature.Theprobleminvolvestheplacementofcomponentsinanavailablespacesuchthatasetofobjectivescanbeoptimizedwhilesatisfyingoptionalspatialofperformanceconstraints.Currenttoolsavailableinpracticetodesignersto

6、aidinthegeneralmechanicallayoutprocessmostlyremainatthestagesofphysicalorelectronicmodelswiththeassistanceofmanualadjustmentandvisualfeedback.Thedifficultyinautomatingthemechanicalandelectromechanicallayoutprocessesstemsfrom:(1)themodelingofthedesign

7、objectivesandconstraints;(2)theconstraints;(3)theidentificationofappropriateoptimizationsearchstrategies.Anumberofdesigngoalscanbemodeledaslayoutobjectives.Inaddition,asetofconstrainsoftenhastobesatisfiedtoensuretheapplicabilityofthelayouts.Efficient

8、calculationsofobjectivesandconstraintsarenecessarytosolvethelayoutproblemsinreasonabletimesincetheanalysisofobjectivesandconstraintscanbecomputationallyexpensiveandalargenumberofevaluationsmayberequiredtoachieveconvergence.Thesearchspaceofthelayoutpr