基于LEMs的平面抗拉压柔性内铰链设计

发布时间：2018-04-28 05:24

  本文选题：抗拉压柔性铰链 + LET柔性铰链　； 参考：《华中科技大学学报(自然科学版)》2017年06期

【摘要】：针对平板折展(LET)柔性内铰链不适宜承受轴向拉力和压力的问题,提出了一种平面抗拉压柔性内铰链.首先,基于反演原则,设计了平面抗拉压柔性内铰链的外形结构;其次,推导了该柔性铰链的弯曲等效刚度与拉压等效刚度的闭式解析式,并用有限元软件对两个闭式解析式进行校验,分析结果显示封闭解与有限元结果的偏差分别小于1.76%和4.75%,从而验证了上述刚度闭式解析式的正确性;然后,利用转动轴心漂移量对平面抗拉压柔性内铰链的转动精度进行了分析;最后,将平面抗拉压柔性内铰链和LET柔性内铰链的各项性能进行比较.结果表明:在外形尺寸一致的情况下平面抗拉压柔性内铰链的弯曲刚度仅是LET柔性内铰链的1.19倍,而拉压刚度和转动轴心漂移量却分别为其19.15~27.70倍和88%;在弯曲刚度没有明显变化的前提下,平面抗拉压柔性内铰链的拉压刚度及转动精度均有显著提高.
[Abstract]:In order to solve the problem that the flexible inner hinge of flat plate is not suitable for bearing axial tension and pressure, a kind of planar flexure hinge is proposed. Firstly, based on the inversion principle, the shape structure of the plane flexure hinge is designed. Secondly, the closed analytic formula of the bending equivalent stiffness and the tension compression equivalent stiffness of the flexure hinge is derived. The results show that the deviation between the closed solution and the finite element result is less than 1.76% and 4.75% respectively. The rotation accuracy of the plane flexure hinge is analyzed by using the rotation axis drift. Finally, the performances of the plane tension and compression flexure inner hinge and the LET flexure inner hinge are compared. The results show that the bending stiffness of the plane flexure hinge is only 1.19 times that of the LET flexure hinge under the same shape and size. However, the tensile and compression stiffness and the rotation axis drift are 19.15 ~ 27.70 times and 88 times respectively, and the tension and compression stiffness and rotation precision of the plane flexure hinge are improved obviously without obvious change of bending stiffness.
【作者单位】： 江南大学机械工程学院;江南大学江苏省食品先进制造装备技术重点实验室;哈尔滨工业大学机器人技术与系统国家重点实验室;
【基金】：国家自然科学基金资助项目(50905075) 江苏省“六大人才高峰”资助项目(ZBZZ-012) 哈尔滨工业大学机器人技术与系统国家重点实验室开放基金资助项目(SKLRS-2016-KF-06)
【分类号】：TH112
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本文编号：1813952