外文文献及译文

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1、本科毕业设计（本科毕业论文）外文文献及译文文献、资料题目：Vibrationsuppressionoffixed-timejibcranemaneuvers文献、资料来源：网络文献、资料发表（出版）日期：2010.11院（部）：机电工程学院专业：机械工程及自动化班级：机械0808姓名：秦梅学号：2008072135指导教师：周海涛翻译日期：2012.3.26山东建筑大学毕业设计（或毕业论文，二选一）外文文献及译文外文文献：　Vibrationsuppressionoffixed-timejibcranemaneuversABSTRA

2、CTAjibcraneconsistsofapendulum-likeendlineattachedtoarotatablejib.Withinthisgeneralcategoryofcranesthereexistdeviceswithmultipledegreesoffreedomincludingvariableload-linelengthandvariablejiblength.Thesecranesarecommonlyusedforconstructionandtransportationapplications.P

3、oint-to-pointpayloadmaneuversusingjibcranesareperformedsoasnottoexcitethesphericalpendulummodesoftheircableandpayloadassemblies.Typically,thesependulummodes,althoughtime-varying,exhibitlowfrequencies.Theresultingmaneuversarethereforeperformedslowly,contributingtohighco

4、nstructionandtransportationcosts.Thecraneconsideredhereconsistsofasphericalpendulumattachedtoarigidjib.Theotherendofthejibisattachedtoadirectdrivemotorforgeneratingrotationalmotion.Ageneralapproachispresentedfordeterminingtheopen-looptrajectoriesforthejibrotationforacc

5、omplishingfixed-time,point-to-point,residualoscillationfree,symmetricmaneuvers.Theseresidualoscillationfreetrajectoriespurposelyexcitethependulummodesinsuchawaythatattheendofthemaneuvertheoscillatorydegreesoffreedomarequiescent.Simulationresultsarepresentedwithexperime

6、ntalverification.Keywords:RotaryCrane,Control,Swing-Free,Oscillation-Free,InputShaping1INTRODUCTION.Constructionandtransportationcranescangenerallybegroupedintooneoftwocategoriesbasedontheirconfiguration.Thefirstcategoryconsistsofoverhead,gantrycranes.Thesesystemsincor

7、porateatrolleywhichtranslatesinthehorizontalplane.Attachedtothetrolleyisaload-lineforpayloadattachment.Typically,theyhavevaryingload-linelengthcapabilities.Thesecondcategoryconsistsofrotarycranes.Asthenameimplies,theload-lineattachmentpointundergoesrotation.Otherdegree

8、soffreedommayexistsuchastranslationoftheload-lineattachmentpointalongthejib,variableload-linelength,orifthejibisrepla