A Family of Butterfly Flexural Joints: Q-LITF Pivots
A Family of Butterfly Flexural Joints: Q-LITF Pivots
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DOI：
10.1115/1.4007917
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发表时间：
2012-12
影响因子：
3.3
通讯作者：
X. Pei;Jingjun Yu;G. Zong;S. Bi
中科院分区：
文献类型：
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作者：
X. Pei;Jingjun Yu;G. Zong;S. Bi
叶型等腰梯形弯曲 (LITF) 枢轴由两个柔性梁和两个刚体组成。对于单个 LITF 枢轴，运动范围较小，而中心偏移相对较大。通过四个LITF枢轴的组合可以大大提高性能能力。基于LITF枢轴的伪刚体模型(PRBM)，提出了一种将单LITF枢轴(或双LITF枢轴)作为可配置挠性模块构建Quadri-LITF枢轴的方法。合成了十种类型的 Q-LITF 主元。与单LIFT枢轴相比，行程变大，刚度变小。其中四个具有增加的中心偏移。其他四个中心偏移减小。选择四重 LITF 主元之一作为示例来解释所提出的方法。 PRBM与有限元分析(FEA)结果的比较表明了该方法的有效性和有效性。Copyright © 2011 by ASME
The Leaf-type Isosceles-Trapezoidal Flexural (LITF) pivot consists of two compliant beams and two rigid-bodies. For a single LITF pivot, the range of motion is small while the center-shift is relatively large. The capability of performance can be improved greatly by the combination of four LITF pivots. Base on the pseudo-rigid-body model (PRBM) of a LITF pivot, a method to construct the Quadri-LITF pivots is presented by regarding a single LITF pivot (or double-LITF pivot) as a the configurable flexure module. Ten types of Q-LITF pivots are synthesized. Compared with the single LIFT pivot, the stroke becomes larger, and stiffness becomes smaller. Four of them have the increased center-shift. The other four have the decreased center-shift. One of the quadruple LITF pivots is selected as the examples to explain the proposed method. The comparison between PRBM and Finite Element Analysis (FEA) result shows the validity and effectiveness of the method.Copyright © 2011 by ASME