哈工大数控大作业完美版.doc

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1、______________________________________________________________________________________________________________________________________________________《数控技术》课程（2015）大作业院（系）专业姓名学号班号任课教师完成日期哈尔滨工业大学机电工程学院2015年5月______________________________________________________________________

2、______________________________数控大作业第一作业调研报告1.1调研内容请以课堂所学习的知识为基础，自主选择课程中所涉及的任一知识点进行调研。可以调研知识点的发展脉络，也可以重点介绍该知识点的发展现状、争议与未来发展趋势。请提交交独一无二的报告1.2工作量与要求1.报告需用英文撰写，可计算机打印，也可手写，但最后封面需手工签名。2.格式请参照本科生毕业论文要求（见教务处网站），总字数不少于2000字。3.在调研报告的最后，请列出参考的主要文献（英文学术刊物上正式发表的文献不少于5篇）或网址，并在正文中标注引用。4.如果出

3、现雷同，两位同学均无成绩。1.3正文____________________________________________________________________________________________________ThedevelopmentandapplicationofNCmachinetoolservosystemSincetheinventionofNCmachinetoolin1950s,servosystemhasbeentheindispensablecomponentoftheNCmachinetool.Wit

4、htherapiddevelopmentofnewmaterials,electronicpowerandcontrollingsystem,theservosystemhasevolvedfromthestep-by-stepsystemtoDCsystemandthentoACsystem.AstheblossomofACservotechnology,ACservosystemwillreplacetheDCsystemwhollyandtakeupthedominantpositioninthefamilyofservosystem.Wit

5、htheelectronicpowerconversionunitasactuatorandcontrollerascore,Servosystemwhichcontainstheservodriverandservomotorconstitutesthemainpartoftheelectric-drivingandautomaticcontrolsystem.Whenworking,firstlytheservosystemwillreceivethesignalfromNCdevices,andthendrivethemotionofmach

6、inetoolaswellasensuretheaccuracyandspeedinessofmovementundertheguidanceofpulsecommand.Usually,precisionandspeedoftheNCmachinetoolandothertechnicalindicatorsmainlydependontheservosystemitself1.TheimprovementandassortmentofNCservosystem___________________________________________

7、_________________________________________________________Atpresent,engineerstendtoassessthequalitybyreferencetoseveralimportantindicators,suchasprecision,speedandsoon.Therefore,aNCservosystemmustmeettheserequirements.HighprecisionUnlikethetraditionalmanufacturingwhichcanbemanu

8、allyhandledtoregulateandcompensateerrors,theNCservosystemhasa