摘要
为了对柔性微位移放大机构进行优化设计,有必要对柔性铰链及柔性放大机构进行参数化分析与研究。提出了一个通用的结构参数ε,探讨了ε对不同柔性铰链柔度系数的影响规律,并横向比较了常用柔性铰链的柔度特性。另一方面,基于柔度特性的影响分析,提出了新的参数柔度比λ,重点分析了不同柔度比λ的柔性铰链主要输出位移形式的灵敏度。以实际的桥式柔性微位移放大机构为例,利用参数ε和λ实现了该柔性放大机构的参数化设计,并用有限元软件进行了仿真计算。实验测量结果表明,对基于柔性铰链的柔性微位移放大机构进行参数化设计,最终输出位移行程与有限元仿真设计的结果误差率为3.80%。基于柔性铰链的结构参数ε和柔度比λ对柔性放大机构进行参数化设计是可行且正确的,有利于这一类柔性放大机构的优化设计。
Structural parameters decide the amplification, gain, and motion accuracy of the flexible micro-displacement amplification mechanism. However, research on the structural parameters of the flexure hinge or flexible amplification mechanism is still sparse. In order to optimize the flexible amplification mechanism, it was necessary to design the flexure hinge and flexible amplification mechanism parametrically. In this context, a new general structural parameter Ε was proposed. Its effect on the flexibility coefficients of different types of flexure hinges was discussed in detail, and the flexibility features of commonly used flexure hinges were compared horizontally. Based on the analysis of the flexibility features, a new parameter λ was proposed as the flexibility ratio, and the main types of output displacement sensitivities of the flexure hinges with different λ were analyzed. A practical bridge-type flexible micro-displacement amplification mechanism was taken as an example, which achieved the parametric design with Ε and λ, and was also simulated for parametric design using the finite element method (FEM). After parametrically designing the flexible amplification mechanism based on flexure hinges, combined with the Ε and λ parameters, the experimental results showed that the error of the output displacement between FEM and experiment was only 3.80%. It was thus feasible to design a flexible amplification mechanism parametrically using the structure parameters of the flexure hinges, and such design is helpful to optimize this type of flexible amplification mechanism. © 2016, Editorial Department of JVMD. All right reserved.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2016年第5期935-941,共7页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51375224)
江苏高校优势学科建设工程基金资助项目
作者简介
卢倩，男，1983年7月生，博士生、讲师。主要研究方向为压电驱动技术及压电致动测试计量技术。曾发表《深切口椭圆柔性铰链优化设计》（《光学精密工程》2015年第23卷第1期）等论文。E—mail：jackeylunuaa@126．com
通信作者简介：黄卫清，男，1965年4月生，博士、教授、博士生导师。主要研究方向为超声电机技术。E-mail：mehwq@nuaa．edu．cn
