平面折展机构S形柔性铰链设计与试验

设计平面折展柔顺机构的关键技术之一是设计柔性铰链。提出了一种用于平面折展柔顺机构的S形柔性铰链,设计了该铰链的结构形式,并对其等效刚度进行了分析,推导出该结构形式铰链的弯曲等效刚度和扭转等效刚度计算公式。通过设计实例的理论计算和有限元仿真分析,验证了计算公式和仿真模型的正确性。制作了基于S形柔性铰链的平面折展柔顺滑块机构的实物模型,仿真分析和测试结果表明,该机构在工作状态可具有较大变形,并且滑块位移达到76 mm时仍能保持良好的精度,仿真与测试结果基本一致,误差仅为0.76%。

Design and Test of Lamina Emergent Mechanisms S-shaped Flexure Hinge

Part of the challenge in designing LEMs (Lamina emergent mechanisms) comes in designing the suitable flexure hinges. A new S-shaped flexure hinge used on LEMs was proposed and its structure was designed. The bending stiffness equivalent and torsion stiffness equivalent of the S-shaped flexure hinge was presented. By theoretical calculation and finite element simulation analysis of the design example, the correctness of the calculation formula and simulation models was verified. The LEMs slider mechanism base on S-shaped flexure hinge was produced. The FEA model and test results prove that this mechanism can produce large deformation with high accuracy in operating state, when the displacement of slider reached to 76.mm, the FEA and test results are basically the same, the deviation between them is 0.76%.