| 模拟柔顺机构中柔顺杆件末端特征的2R伪刚体模型 |
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| 引用本文： | 冯忠磊,余跃庆,王雯静.模拟柔顺机构中柔顺杆件末端特征的2R伪刚体模型[J].机械工程学报,2011,47(1). |
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| 作者姓名： | 冯忠磊 余跃庆 王雯静 |
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| 作者单位： | 北京工业大学机械工程与应用电子技术学院,北京,100124 |
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| 基金项目： | 国家自然科学基金(50875002); 北京市教委科技发展计划(KM200610005003)资助项目 |
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| 摘 要： | 柔顺机构是一种新型机构,其中包含的柔顺杆件会因为产生大变形而导致分析起来十分复杂。伪刚体模型能够简化柔顺杆件的大变形分析。基于伪刚体模型的原理,针对柔顺机构中的柔顺杆件,提出以末端转角参数化近似方法为基础的2R伪刚体模型。该模型用两个不同劲度系数的扭转弹簧连接3个不同长度的刚性杆件,并用特征半径系数表征刚性杆件的长度,用刚度系数表征扭簧的扭转能力,通过二维搜索得到模型的最优特征半径系数,应用线性回归方法得到模型的刚度系数。该模型能准确模拟柔顺机构中柔顺杆件的末端变形轨迹和变形角度。推导柔顺杆件和伪刚体模型变形时的应变能公式,通过数值对比,从能量角度评价伪刚体模型储存应变能的能力。
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| 关 键 词： | 柔顺机构 伪刚体模型 参数化近似 应变能 |
2R Pseudo-rigid-body Model of Compliant Mechanisms with Compliant Links to Simulate Tip Characteristic |
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| FENG Zhonglei,YU Yueqing,WANG Wenjing.2R Pseudo-rigid-body Model of Compliant Mechanisms with Compliant Links to Simulate Tip Characteristic[J].Chinese Journal of Mechanical Engineering,2011,47(1). |
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| Authors: | FENG Zhonglei YU Yueqing WANG Wenjing |
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| Affiliation: | FENG Zhonglei YU Yueqing WANG Wenjing(College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology,Beijing 100124) |
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| Abstract: | Compliant mechanism is a kind of new type mechanism and its analysis is very complex because compliant links often under large deflections which introduce geometry nonlinearities.Pseudo-rigid-body model(PRBM) can simplify large-deflection analysis of compliant links.Based on PRBM,a 2R model is proposed for the compliant mechanisms with compliant links and a parametric approximation is made to the deflection angle of a compliant link.This model comprises three rigid links of different length which are connec... |
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| Keywords: | Compliant mechanism Pseudo-rigid-body model Parametric approximation Strain energy |
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