利用压电致动器实现双稳态横梁的快速通过

IF 2.4 3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Taha Ajnada, Yves Bernard, Laurent Daniel
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引用次数: 0

摘要

本文介绍了使用压电(PZ)驱动的双稳态系统的快速通过。双稳态系统由固定在两个夹钳之间的预扣梁组成。采用两种方法对梁的双稳态性和快速通过进行建模。首先建立一个分析模型。将结果与完整的有限元模拟进行比较。这些建模方法用于找到用于开关的 PZ 贴片的最佳位置。然后,使用等效力矩分析模型和有限元模拟对 PZ 驱动的快穿进行建模。相应地,还开发了一套实验验证装置。验证涉及建模的各个方面:双稳态、快通和 PZ 驱动快通。对于后者,研究了两种配置,即由单个 PZ 贴片或两个贴片驱动的开关。两种建模方法与实验测量结果之间存在明显的一致性。所提出的分析建模工具可用于双稳态器件的快速预设计。例如,研究表明,一个初始横向位移约为 1 毫米的厘米级钢制器件可以通过几牛顿的力或几百伏特的 PZ 贴片进行切换。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Snap-through of a bistable beam using piezoelectric actuation
The paper presents the snap-through of a bistable system using piezoelectric (PZ) actuation. The bistable system consists of a pre-buckled beam fixed between two jaws. The bistability and snap-through of the beam are modelled using two approaches. An analytical model is first implemented. The results are compared to a full finite element simulation. These modelling approaches are used to find the optimal positioning of the PZ patches used for switching. The PZ-actuated snap-through is then modelled using both an analytical equivalent moment model and finite element simulations. An experimental validation setup is developed accordingly. The validation addresses all aspects of the modelling: bistability, snap-through and PZ-actuated snap-through. For the latter two configurations were studied, namely a switching actuated by a single PZ patch or by two patches. A remarkable agreement is found between both modelling approaches and experimental measurements. The proposed analytical modelling tool can be used for rapid pre-design of bistable devices. It is for instance shown that a centimetre-scale steel-device with an initial transverse displacement about 1 mm can be switched with a few-Newton force or alternatively with a few hundreds of Volts using a PZ patch.
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来源期刊
Journal of Intelligent Material Systems and Structures
Journal of Intelligent Material Systems and Structures 工程技术-材料科学:综合
CiteScore
5.40
自引率
11.10%
发文量
126
审稿时长
4.7 months
期刊介绍: The Journal of Intelligent Materials Systems and Structures is an international peer-reviewed journal that publishes the highest quality original research reporting the results of experimental or theoretical work on any aspect of intelligent materials systems and/or structures research also called smart structure, smart materials, active materials, adaptive structures and adaptive materials.
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