直角柔性铰链的力学特性

为了深入分析精密传动用柔性铰链的机械性能，在研究常用结构形式柔性铰链力学特性的基础上，对变形敏感的直角柔性铰链的力学特性进行了分析．建立了直角柔性铰链空间力学模型，推导了空间刚度矩阵表达式．在此基础上。从柔性铰链基本结构尺寸等方面研究了影响柔性铰链刚度性能的因素，研究发现影响柔性铰链变形性能的刚度系数与柔性铰链几何尺寸参数和构成柔性铰链材料的弹性模量密切相关．研究表明，当柔性铰链的有效长度增加或材料的弹性模量降低时，其各方面的刚度系数均有不同程度的降低．研究工作对深入分析柔性铰链力学特性、优化设计压电驱动器结构，提高其综合性能具有一定的意义．

Mechanical Performance of Right-Angle Flexure Hinge

To analyze the mechanical performance of flexure hinges used as precision transmission element, based on the study of kinds of familiar flexure hinges, the mechanical performance of fight-angle flexure hinge was analyzed because of its sensitive deformation. Three dimensional mechanical model of right-angle flexure hinge was established, and matrix expression of its stiffness coefficient was deduced. The factors influencing the stiffness performance of right-angle flexure hinge were studied from essential size and so on. The results show that the stiffness coefficient of flexure hinge is influenced by its essential size and elastic modulus. When the length of flexure hinge increases or the elastic modulus of flexure hinge material decreases, the stiffness co- efficient will decrease in all directions. All those work is of good significance to analyzing mechanical perfor- mance of flexure hinge, optimizing design of piezoelectric actuator and improving integrative performance of piezoelectric actuator.