資源描述：
《基于CMM復雜曲面測量的采樣方法及測頭半徑補償研究》由會員上傳分享，免費在線閱讀，更多相關內(nèi)容在學術論文-天天文庫。
1、中南大學碩士學位論文基于CMM復雜曲面測量的采樣方法及測頭半徑補償研究姓名：廖菲申請學位級別：碩士專業(yè)：機械制造及其自動化指導教師：曾韜20090501插值的采樣方法和基于四點共球理論的測頭半徑補償方法實現(xiàn)了對自由曲面的測量優(yōu)化，滿足了使用要求，有一定的實際應用價值。關鍵詞：三坐標測量機，測量規(guī)劃，采樣方法，測頭半徑補償ABSTRACTThemeasuringproblemofcomplexsamplesexistswidelyinthefieldofautomobilemanufactureandmolding．Itisdifficultt
2、omeasurepartswithhighprecisioneffectivelyandgetageneraldetectionmethodanddataprocessingtechnology．Fortheexistingmeasuringtechniquehascertainlimitsandshortages，thisthesismainlyperformstheresearchofmeasurementplanningofcurvedsurfaceandoptimizationofthemeasuringpath．Thegasolin
3、eshellismeasuredbyusingGLOBALSTATUS575movingbridgetypeCMM(coordinatemeasuringmachine)ofHexagonandoptimizingofthemeasuringpathandcompensatingoftheproberadiusareinvestigatedsubsequently．Themainworksandresultsare-"1．Thehistoryofthemeasuringtechnologiesoffree—formsurfaceissurve
4、yedinthefirstpartofthisthesis．Theshortcomingsofthepresentmeasuringtechnologies，suchasdistributingpoints，overmanymeasuringpointsandcompensatingprecisionrapidly,areanalyzed．2．Thecubicsplinepredictionmethodisproposedbasedonthecomparingwiththepresentedconventionalsamplingmethod
5、s．AnanimateexampleisillustratedsubsequentlyandthepredictionmethodisprovedtobevalidinsimulationofMatlab．3．Basedontheanalysisofconventionalsamplingmethods，a，cubicsplinepredictionmethodbasedonthespecificpropertiesofcurvedsurfaceisdeveloped．Throughcomparingthepredictionaccuracy
6、andcomputationofcubicsplinepredictionmethodandpredictionmethod，theformerhasbeenprovedtoimprovethemeasurementefficiencyandaccuracy．4．Theexpriementofthemeasuringplanningispreformed．ThecloudpointisusedtoreconstructbyImageware．5．Themethodbasedon“four-pointbuildasphere’’theoryis
7、proposedbasedonpresenttwo．dimensionalcompensationandthree—dimensionalcompensationmethods．1116·Thetwocompensatingmethods，micro．spherecompensatingandsphnecompensatingmethodareusedtoanalyzethedatafromthegasolineshellexperiment．Theresultsshowthattheerrorsbymicro。spherecompensat
8、ingmethodiSfarlowerthanthat’Sobtainedbyusingsplinecompensatingmethod，andthemainlyr
