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ID:36596275
大小:5.43 MB
页数:124页
时间:2019-05-12
《分布环境下的协同装配序列规划》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、华中科技大学博士学位论文分布环境下的协同装配序列规划姓名:王峻峰申请学位级别:博士专业:机械设计及理论指导教师:钟毅芳;刘继红20040306华中科技大学博士学位论文AbstractAsthekeysupportingtechnologyofconcurrentengineeringandcomputerintegratedmanufacturing,computeraideassemblyplanningisoneoftheimportantissuestodigitalpre-assemblythatdeterminestheproductionc
2、osttoagreatextent.Alongwiththeincreaseofpartsinproducts,assemblysequenceplanningismoreandmoredifficult.Inaddition,thenetworkedmanufacturingpatternrequirescollaborativepre-assemblytechnology.Soadistributedandintegratedframeworkforcooperativedesignforassemblyispresented,andthecoll
3、aborativeassemblysequenceplanningmethodforcomplexproductsisinvestigated.Basedonanalysisofgeneralassemblyconfigurationdesignandinformationrequirementsofassemblymodelforcollaborativesequenceplanning,theideaofassemblymodelingthatcontainsintents,processandresultsofassemblydesignispu
4、tforward.Aknot-basedassemblyrelationgraphandashared-part-basedhierarchicaltreeoflocalproductstructuresforsequenceplanningareinvestigatedandconstructed.Theinformationofparts,knotsandmanagement,whicharetheelementsofassemblymodelforcollaborativesequenceplanning,isclarifiedAnantcolo
5、nysystembasedcooperativealgorithmispresentedandrealizedforassemblysequencegenerationandoptimizationoflocalstructuresadoptingassemblybydisassemblyscheme.Inthealgorithm,theimplicitsequencespaceisbuiltdynamicallybydisassemblycompletegraphandthestartingnodesaresetoninitiallyfeasible
6、disassemblyoperations.Thegeometricfeasibilityreasoningofassemblyprocessbasedonintegrateddisassemblymatrixisusedtorestrictthesearchandensurethevalidityofsequences.Thecharacteristicsofthealgorithmarediscussedandthecomparisonstootherintelligentassemblyoptimizationalgorithmsareanaly
7、zed.Accordingtothehierarchicaltree,thesynthesisprocessoflocalsequencesbasedonsharedpartsinvolvingadjustment,combination,eliminationofredundantconstraints,andsearchofsequencesinabottom-to-upmannerisinvestigated.Theadjustmentrulestolocalsequencesarediscussed.Aspatialblockinggraphi
8、sproposedtoexpressglobalassemblyprecedencerelat
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