A quadratic NURBS arc transition path in the adjacent segments which was everywhere curvature-continuous was proposed to solve the problems of the machine vibration and shocks caused by abrupt change of velocity and acceleration,and then the high-speed smooth transition was obtained.Based on the arc model,a look-ahead control algorithm was established.Under the conditions of the chord errors and machine dynamics,the algorithm aimed to achieve optimal transition velocity,and control acceleration/deceleration...
【基金】
国家自然科学基金资助项目(51305254);
上海市教委科研创新项目(13YZ108)
【更新日期】
2015-08-25
【分类号】
TG659
【正文快照】
Hong Jiangtao,Nie Qing,Wang Weihua.CurrentSituation of Chinese Enterprise Value Chain fromKnowledge Competence Perspective[J].InformationJournal,2009,28(9):117-121.[16]维基百科.创客[EB/OL].(2013-12-2)[2014-1-26].http://zh.wikipedia.org/w/index.php?title=%
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