資源描述：
《復雜形狀輪廓的幾何形狀誤差評定方法分析》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、中南大學碩士學位論文【。。。。。。。。?！??！?。。。。。。。。。?！?。。。。。。。‘。?！?。。?！?。。。。。。’’。?！?‘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中南大學碩士學位論文ABSTRACTacquireabetterresult．KEYWORDSformerror,minimumcondition，optimizationalgorithms，matl
