Design of Parallel Kinematic XY Flexure Mechanisms
Design of Parallel Kinematic XY Flexure Mechanisms
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DOI：
10.1115/detc2005-85413
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
S. Awtar;A. Slocum
中科院分区：
文献类型：
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作者：
S. Awtar;A. Slocum
本文提出了平行运动XY机构的设计，是基于一个系统的约束模式。通过双平行四边形柔性模块实现的约束模式允许大范围的运动，而不会过度约束机构或产生显着的误差运动。非线性力-位移特性的双弯曲的分析预测建议XY机构的性能指标。比较了线性和非线性分析的闭合形式，以突出前者的不足。定性和定量地讨论了弯曲机构性能的基本设计权衡。结果表明，几何对称的约束安排放宽了一些设计权衡，从而提高了性能。通过有限元分析和实验测量验证了非线性分析预测。Copyright © 2005 by ASME
This paper presents parallel kinematic XY mechanism designs that are based on a systematic constraint pattern. The constraint pattern, realized by means of double parallelogram flexure modules, is such that it allows large ranges of motion without over-constraining the mechanism or generating significant error motions. Nonlinear force-displacement characteristics of the double parallelogram flexure are used in analytically predicting the performance measures of the proposed XY mechanisms. Comparisons between closed-form linear and nonlinear analyses are presented to highlight the inadequacy of the former. Fundamental design tradeoffs in flexure mechanism performance are discussed qualitatively and quantitatively. It is shown that geometric symmetry in the constraint arrangement relaxes some of the design tradeoffs, resulting in improved performance. The nonlinear analytical predictions are validated by means of Finite Element Analysis and experimental measurements.Copyright © 2005 by ASME