中文摘要：

设计了一种基于串联式的Triple-LET新型柔性铰链,给出了该铰链的三维结构,并对其进行了弯曲等效刚度的理论分析,推导了该结构形式铰链的弯曲等效刚度计算公式并给出了修正系数。基于修正的弯曲等效刚度理论计算公式,对设计实例进行了分析计算,同时建立了该设计实例的有限元仿真模型,通过理论计算结果和仿真分析结果的比较,验证了该铰链设计的可行性。将该新型铰链应用于LEMs柔顺滑块机构的设计中,建立了该机构的基于修正弯曲等效刚度的伪刚体模型,并加工了该串联式Triple-LET铰链的滑块机构铍青铜实物模型,理论计算和实测结果基本一致,验证了理论模型的正确性和机构设计的可行性,同时也表明该滑块机构在工作状态具有较大变形,能保持较好的稳定性。

英文摘要：

A new kind of flexure hinge,which was used on LEMs,named Triple-LET was proposed via connecting three outside LET flexure hinges,and its 3D structure was designed and analyzed. The equivalent bending stiffness of the Triple-LET flexure hinge was deduced and a modified coefficient was presented to optimize the results. Based on the modified formula of equivalent bending stiffness,the theoretical calculation of the design example was deduced,and the finite element simulation model of the design example was established and analyzed. Through comparing theoretical calculation results with finite element simulation results of the design example,the feasibility of the Triple-LET flexure hinge was verified. In order to verify the availability of the new flexure hinge in practical application,the Triple-LET flexure hinge was applied to a lamina emergent slider mechanism. The pseudo-rigid-body model of the lamina emergent slider mechanism was established based on the modified equivalent bending stiffness,and the physical model of the lamina emergent slider mechanism was made of beryllium bronze material based on the series Triple-LET flexure hinge. The theoretical calculation results and experimental results were basically consistent,therefore,the correctness of the theoretical model and the feasibility of the design example were verified,and it also indicated that the lamina emergent slider mechanism can implement large deformation and maintain a good stability in working status.