基于可靠性的汽车转向机构稳健优化设计

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1、-------AbstractTHEROBUSTOPTIMIZATIONOFSTEERINGMECHANISMFORTRUCKSBASEDONRELIABILITYDESIGNABSTRACTRobustdesignasaneffectivewaytoimprovethequalityofproductsisbecomingamore andmoreimportantmethodinthefiledofproductdesignespeciallyinvehicledesign. Consideri

2、ngtheimpactofcontrollablefactorsandnoisefactorsinoptimizationdesign forsteeringmechanismoftrucks,basedonthereliability-basedoptimizationtheory,the stablereliabilitysensitivitymethodandtherobustdesignmethod,thereliability-basedrobust designforsteeringme

3、chanismoftrucksisextensivelydiscussed.Thekinematicsaccuracyof themechanismisconsideredasamajoroptimizationobjective.Thereliabilitysensitivityof kinematicsaccuracyisaddedtothereliability-basedoptimizationdesignmodelandthe reliability-basedrobustdesignis

4、transformedintothemulti-objectiveoptimizationproblem. Forreliabilityoptimizationdesignwithuncertainparameters,basedonthe non-probabilisticreliabilitytheoryandrobustdesignmethod,theoptimizationdesignof robustreliabilitywasproposed.Comparedwiththetraditi

5、onalprobabilisticreliability optimization,theproposedmethoddoesnotrequireapresumedprobabilitydistributionofthe uncertainparametersandonlytheboundsorrangesofvariationofthemarerequired. Top-leveloptimizationwasusedtosolvetheoriginalrobustoptimalmodelwith

6、the constraintsofnon-probabilisticreliabilityindex,andlower-leveloptimizationwasusedto identifythereliabilityindex.Itdoesthree-dimensionalmodelingforautomotivesteeringusingCATIAsoftware.First, -----------theintegralsteeringbodyfor3Dmodeling,thecomponen

7、tpartsformodelingseparatelyand thenthevariouspartsareassembled,usingtheDMUmodulesformotionsimulationandthe simulationresultsareanalysed;Second,thedividedsteeringstructureformodeling,itsbasic stepsassameastheintegralsteeringstructure.KeyWords:Steeringme

8、chanism,Robustdesign,ReliabilityRobustoptimization,RobustReliabilityoptimizationII-----------目录目录主要符号说明..............................................................I 第一章绪论..............................................................1