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1、中南大學(xué)碩士學(xué)位論文【。。。。。。。。?！！?。。。。。。。。。?！?。。。。。。。‘。?！?。。’’。。。。。?！??！?‘ABSTRACTABSTRACTFormerrormakesgreateffecttOthequalityofpieceparts，itisdifficulttoevaluatetheerrorofcomplexcurveandsurface，theresearchontheformerrorevaluationofthecomplexCurveandsurfacehasimporta
2、nttheorysignificanceandeconomicvalue．Inthisarticle，theformerrorisstudiedbasedonmatlabandcalculatingexampleispresented．Themainresearchisasfollows．1、Themathematicalmodelincludestraightnesserror,flatnesserror,Circularityerror,cylindricityerror,sphereerror,taper
3、errorarestudied，theoptimizationalgorithmsbasedonmatlabisusedtocalculateformerror,theerrorevaluationispresentedindetailinthispaper．2、Accordingtominimalzonelaw,themathematicalmodelofcomplexcurveprofileerrorevaluationiScreated．themathematicalmodeloftheoreticalc
4、urveisconstructedwithNURBSbyinterpolatingdesignpoints，thesubdivisionapproximatingalgorithmistakenforfastcalculatingtheminimumdistancebetweenmeasurepointsandtheoreticalprofilecurve，thepositionbetweenthemeasurepointsandthetheoreticalprofileismatchedthroughcoor
5、dinatetransformtoavoidtheevaluationerrorderivedfrompositionerror,theerrorevaluationoflineprofileiSpresentedindetailinthisPaper．3、Accordingtominimalzonelaw9themathematicalmodelofcomplexsurfaceprofileerrorevaluationiScreated。Themathematicalmodeloftheoreticalsu
6、rfaceiSconstructedwithNUImSbyinterpolatingdesignpoints，thesubdivisionapproximatingalgorithmistakenforfastcalculatingtheminimumdistancebetweenmeasurepointsandtheoreticalsurface．也epositionbetweenthemeasurepointsandthetheoreticalprofileiSmatchedthroughcoordinat
7、etransformtoavoidtheevaluationerrorderivedfrompositionerror,theBFGSalgorithmistakenforcalculatingnonlinearoptimization．TheerrorevaluationofsurfaceprofileispresentedindetailinthisPapeL4、AnewerrorevaluationsoftwarebasedontheoptimizationtoolboxesofNLATLABispres
8、entedtovalidatethemethodofformevaluation．TheexperimentresultsshowtheproposedmethodcanrapidlyⅡ中南大學(xué)碩士學(xué)位論文ABSTRACTacquireabetterresult．KEYWORDSformerror,minimumcondition，optimizationalgorithms，matl
