简介：Toreducemechanicalvibrationsinducedbybigerrorscompensation,anewsoftwarecompensationmethodbasedonanimproveddigitaldifferentialanalyzer(DDA)interpolatorforstaticandquasi-staticerrorsofmachinetoolsisproposed.BasedonprincipleoftraditionalDDAinterpolator,aDDAinterpolatorisdividedintocommandgeneratorandcommandanalyzer.Therearethreetypesoferrors,consideringthedifferenceofpositionsbetweencompensationpointsandinterpolationsegments.Accordingtotheclassification,errorsaredistributedevenlyindataprocessingandcompensatedtocertaininterpolationsegmentsinmachining.On-lineimplementationresultsshowthattheproposedapproachgreatlyimprovespositioningaccuracyofcomputernumericalcontrol(CNC)machinetools.
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