机器人2011，Vol.33Issue(2)：251-256,6.DOI:10.3724/SP.J.1218.2011.00251
柔性桥式微位移机构位移放大比特性研究
Analysis on Displacement Amplification Ratio of a Flexible Bridge-Type Micro-Displacement Mechanism
叶果 1李威 1王禹桥 1杨雪锋 1余凌1
作者信息
- 1. 中国矿业大学机电工程学院,江苏,徐州,221008
- 折叠
摘要
Abstract
In order to analyze the characteristic of displacement amplification ratio of flexible bridge-type microdisplacement amplifier, a quarter mathematic model is established by using the symmetrical structure of bridge-type microdisplacement amplifier. The formulas for calculating output displacement and displacement amplification ratio of the bridgetype amplifier are derived by adopting the matrix method to deduce the compliance matrix of the mechanism. Finite element simulation is carried out by software ANSYS11.0, and then compared with the theoretical model. Finally, an experimental sample is designed and fabricated to verify the theoretical model. The results show that the displacement amplification ratio of the amplifier is most sensitive to the distance between two flexure hinges; as the distance increases, the displacement amplification ratio increases sharply at first and then decreases slowly; theoretically speaking, the amplifier can get a displacement amplification ratio for more than 40 times, but the error will be amplified at the same time, so the displacement amplification ratio of the bridge-type micro-displacement mechanism should not be too large.关键词
柔性铰链/桥式微位移机构/1/4模型/位移放大比/有限元仿真Key words
flexure hinge/ bridge-type micro displacement mechanism/ a quarter model/ displacement amplification ratio/ finite element simulation分类
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叶果,李威,王禹桥,杨雪锋,余凌..柔性桥式微位移机构位移放大比特性研究[J].机器人,2011,33(2):251-256,6.
