An enhancing flexibility piezoelectric stick-slip actuator by introducing perforation of flexible hinge

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2024-09-13 DOI:10.1016/j.sna.2024.115871

Shitong Yang , Hao Dong , Zhenguo Zhang , Yunjie Wang , Xuetao Niu , Xiaohui Lu

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引用次数: 0

Abstract

Piezoelectric stick-slip actuators (PSSAs) utilize sliding friction between the mover and stator to convert and transmit motion. However, the phenomenon of backward displacement often hinders the output performance of PSSAs. This paper proposes a method to mitigate backward displacement and enhance output performance by modifying the overall flexibility of the actuator. The key idea of this approach is to propose a novel flexible hinge structure and apply it to PSSA. Numerical calculations and finite element analysis confirm that the flexibility and output performance of the PSSA are significantly improved. The method's feasibility is supported by comparing experiments. The experimental results show that under the same locking force, the optimal excitation frequency of perforated Elliptical Flexure Hinge (EFH) is significantly lower than the non-perforated EFH and the speed is increased over 53 %. Furthermore, the PSSA has a maximum load capacity of 190 g, which is 31.7 times its own weight (6 g). The proposed PSSA can provide valuable insights for its application in precision motion control systems in the foreseeable future.

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通过在柔性铰链上穿孔提高柔性的压电粘滑致动器

压电粘滑致动器（PSSA）利用动子和定子之间的滑动摩擦来转换和传递运动。然而，后向位移现象往往会阻碍 PSSA 的输出性能。本文提出了一种通过改变致动器的整体柔性来减轻后向位移并提高输出性能的方法。该方法的主要思路是提出一种新型柔性铰链结构，并将其应用于 PSSA。数值计算和有限元分析证实，PSSA 的柔性和输出性能得到了显著改善。实验对比证明了该方法的可行性。实验结果表明，在相同的锁定力下，带孔椭圆挠性铰链（EFH）的最佳激励频率明显低于无孔 EFH，速度提高了 53%。此外，PSSA 的最大承载能力为 190 克，是其自身重量（6 克）的 31.7 倍。在可预见的未来，拟议的 PSSA 将为其在精密运动控制系统中的应用提供宝贵的启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...