J4 ›› 2009, Vol. 20 ›› Issue (02): 0-130.

• 机械科学 •    

平面柔顺四杆机构的驱动特性分析

王雯静; 余跃庆   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-01-25 发布日期:2009-01-25

Driving Characteristics Analysis of Planar Compliant Mechanisms

Wang Wenjing; Yu Yueqing   

  • Received:1900-01-01 Revised:1900-01-01 Online:2009-01-25 Published:2009-01-25

摘要:

基于伪刚体模型法,分析研究了平面柔顺机构的驱动特性问题。以平面柔顺四杆机构为研究对象,建立其伪刚体模型。通过对该模型的动力学分析,得到了一种柔顺机构驱动力矩计算的新方法。算式表明柔顺机构的驱动特性与机构中柔性铰链之间存在着内在关系。根据算例分析结果可知,通过改变柔性铰链的刚度以及各柔性铰链未变形时的初始位置能减小机构的最大驱动力矩。

关键词: 柔顺机构;伪刚体模型;柔性铰链;驱动特性

Abstract:

Driving characteristics of planar compliant mechanisms were studied based on the pseudo-rigid-body model herein.A planar four-bar compliant mechanism was taken as an example to analyze, the pseudo-rigid-body model of this mechanism was developed at first.A new method for calculating the driving torque was then obtained based on the dynamic analysis of compliant mechanism, and it shows that the flexible hinges have impact on the driving characteristics of compliant mechanisms.The results of example indicate that the peak driving torque is minimized by modifying the stiffness and the unstrained positions of the flexure hinges.

Key words: compliant mechanism;pseudo-rigid-body;flexural hinge;driving characteristics

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