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Transactions of the Chinese Society for Agricultural Machinery
2015,46
(2)
365-371
基于伪刚体因子的LEMs设计
作 者：
邱丽芳;胡锋;邹静
单 位：
北京科技大学机械工程学院;北京科技大学高等工程师学院
关键词：
LEMs;几何非线性;修正伪刚体模型;伪刚体因子;蚁群算法
摘 要：
伪刚体模型是柔性机构运动、动力学性能分析及综合的基础,梁和铰链的组合是基本的柔性片段,用柔性片段代替刚性构件设计柔性机构是刚体替代综合法的基本思路。传统伪刚体模型不考虑几何非线性影响和梁的变形,使伪刚体模型和设计的实际柔性机构存在较大误差,为了减小误差,建立了几何非线性影响下的修正伪刚体模型;为了确定伪刚体模型的可用条件,提出了伪刚体因子的概念,通过分析得出伪刚体因子在一定范围可以用柔性片段直接代替刚性构件,从而得到柔性机构。最后在该条件下基于蚁群连续空间优化算法给出了用于细胞工程的LEMs机构的优化实例,结果表明该伪刚体因子可应用于LEMs的设计。
译 名：
Design of LEMs Based on Pseudo-rigid Factor
作 者：
Qiu Lifang;Hu Feng;Zou Jing;School of Mechanical Engineering,University of Science and Technology Beijing;School of Advanced Engineer,University of Science and Technology Beijing;
关键词：
LEMs Geometric nonlinearity Corrected pseudo-rigid-body model Pseudo-rigid factor Ant colony algorithm
摘 要：
Pseudo-rigid-body model is an important way to analyze kinematic and dynamic performance of compliant mechanisms and synthesize. The beam-flexible hinge combined mechanism is essential flexible fragment. A compliant mechanism was designed by using flexible fragments to replace rigid members of pseudo-rigid model. Traditionally pseudo-rigid-body model did not consider the effect of geometrical nonlinearity and deformation of the beam,so there was error between pseudo-rigid-body model of LEMs and the actual. In order to reduce the error,the impact of geometric nonlinearity was considered and corrected pseudo-rigid-body model was proposed,and in order to determine the applicability of pseudorigid-body model,the concept of pseudo-rigid factor was put forward. Flexible fragment can directly replace the rigid member when pseudo-rigid factor was in a certain range,and then the compliant mechanism can be obtained. Finally,the LEMs were optimally designed based on pseudo-rigid factor for cell engineering by ant colony optimization algorithm for continuous space.
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