A METHOD FOR THE DESIGN OF COMPLIANT MECHANISMS WITH SMALL-LENGTH FLEXURAL PIVOTS
A METHOD FOR THE DESIGN OF COMPLIANT MECHANISMS WITH SMALL-LENGTH FLEXURAL PIVOTS
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DOI：
10.1115/1.2919359
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发表时间：
1994-03-01
影响因子：
3.3
通讯作者：
MIDHA, A
中科院分区：
文献类型：
--
作者：
HOWELL, LL;MIDHA, A
柔顺或柔性连杆机构从其关节的相对柔性而不是仅从刚体关节获得部分或全部运动。与刚体机构不同，柔性机构的输入和输出端口之间的能量不守恒，因为柔性构件中存储有能量。这种效应和由大挠度引起的非线性使这种机构的分析复杂化。目前，工业上柔顺机构的设计是通过昂贵的试错法来完成的。本文介绍了一种方法，以帮助在一类柔性机构的设计，其中的柔性部分（弯曲枢轴）是在长度上比相对刚性部分小。该方法包括伪刚体模型的定义和使用，以及大挠度有限元类型算法的使用。一个例子是用来说明所描述的设计技术。
Compliant or flexible-link mechanisms gain some or all of their motion from the relative flexibility of their joints rather than from rigid-body joints only. Unlike rigid-body mechanisms, energy is not conserved between the input and output ports of compliant mechanisms because of energy storage in the flexible members. This effect and the nonlinearities introduced by large deflections complicate the analysis of such mechanisms. The design of compliant mechanisms in industry is currently accomplished by expensive trial and error methods. This paper introduces a method to aid in the design of a class of compliant mechanisms wherein the flexible sections (flexural pivots) are small in length compared to the relatively rigid sections. The method includes a definition and use of a pseudo-rigid-body model, and the use of a large-deflection finite element type algorithm. An example is used to illustrate the design technique described.