空间相贯曲线自动焊接中的轨迹控制

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1、山东大学硕士学位论文空间相贯曲线自动焊接中的轨迹控制姓名：徐绍华申请学位级别：硕士专业：系统工程指导教师：田新诚20080508山东大学硕士学位论文VC程序。VC程序采用了分模块的设计思路，对于不同的功能分别设计相应的模块。关键词：空问相贯曲线；曲线拟合；B样条曲线插补；MATLAB；计算机数字控制II山东大学硕士学位论文ABSTRACTWeldingplaysaprimeimportantroleinmanyindustries，includingmilitaryindustry．NowChina’Sweldingindus

2、tryhasbecomethetoponeintheworld，butitisstillatalowautomationlevelbecauseofitslatestartup．ThereisstillalargegapintheautomatedweldingequipmentsbetweenChinaandthemaindevelopedcountries，suchasBritain，theUnitedStates，Germany,France，ItalyandJapan．TheweldingofSpatialInters

3、ectedCurves(SIC)isacommontaskinmanyindustries．TheautomatedweldingofSIChasbeendrawinggreatattentionfromuniversitiesandresearchinstitutesbecauseofitsgreatimportanceinindustries．TheweldingofSICexistsinmanyindustries，suchascarmanufacturing，shipbuilding，oiltransportation

4、pressurevesselsandwatersupply,etc．ChinahasimportedmanyautomatedequipmentsfromUSA，Germany,AustriaforSICwelding，butwehasn’tmasteredthecoretechnologyforautomatedSICwelding．ThereistheurgentneedtoresearchthekeytechnologyandtodevelopautomatedSICweldingequipmentwithourowni

5、ndependentintellectualproperty．Theaccuratedescriptionforweldingseamisthefiststepinautomatedwelding，andithasanimportanteffectonweldingprecision．Thisthesisfirstanalyzesthelimitationofthewayofweldingseamdescriptionthroughspacegeometricanalysis，andthenproposesanewmethod

6、-weldingseamfittingbyB-splinecurvealgorithm，withwhichthemathematicalparameterizedexpressionoftheseamwillbeacquired．AlsothethesisanalyzestheaccuracyoftheB-splinealgorithmfittingmethodbyM棚。AB．TheinterpolationalgorithmisthecoretechnologyofNumericalControl(NC)system，and

7、high-speedandhigh—precisionarealwaysthetargetsforinterpolationalgorithmresearch．ThethesisresearchestheB—splineinterpolationalgorithmforautomatedweldingofSIC．Basedontheanalysisoftraditionalalgorithms，auniversalinterpolationalgorithmwithhighspeedandhighprecisionisprop

8、osed，whichcanbeusedforthemotioncontrolbothinCartesiancoordinatesandnon—Cartesiancoordinatessystems．TheB—splineinterpolationalgorithmforSiC