A novel stick-slip piezoelectric actuator is developed based on a parallelogram flexible drive mechanism to minimize shear force

IF 3.7 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION

Smart Materials and Structures Pub Date : 2024-06-10 DOI:10.1088/1361-665x/ad5125

Tao Zhang, Rui Ma, Yang Wang, Donglong Bian, Jian Zhang, Yuhang Wang

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引用次数: 0

Abstract

A piezoelectric actuator utilizing a parallelogram flexible mechanism is proposed. This actuator harnesses the parasitic motion generated by a parallelogram driven by a piezoelectric element. It differs from existing actuation mechanisms based on a similar principle in that the piezoelectric stack is positioned on the outside of the parallelogram flexible mechanism, thus protecting it from shear forces. Finite element simulations and experiments confirm this. The analysis was conducted using theoretical analysis and finite element simulation. The optimal drive angle for the parallelogram flexible mechanism was determined through finite element simulation. Additionally, a prototype actuator and an experimental measurement system were developed to assess the operational performance of the proposed piezoelectric actuator. When the driving frequency is 475 Hz and the locking force is 5 N, the motion of the actuator achieves a maximum speed of 5.65 mm s⁻¹ and a maximum horizontal load of up to 113 g; when the input frequency is 1 Hz and the input minimum starting voltage is 8 V, the minimum displacement resolution is 30 nm. A comparative analysis of experimental results, theoretical calculations, and finite element simulation results demonstrates the feasibility of the structural design.

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基于平行四边形柔性驱动机构开发出一种新型粘滑压电致动器，可将剪切力降至最低

本文提出了一种利用平行四边形柔性机构的压电致动器。这种致动器利用由压电元件驱动的平行四边形产生的寄生运动。它与基于类似原理的现有致动机构的不同之处在于，压电叠层位于平行四边形柔性机构的外部，从而保护其免受剪切力的影响。有限元模拟和实验证实了这一点。分析是通过理论分析和有限元模拟进行的。通过有限元模拟确定了平行四边形柔性机构的最佳驱动角度。此外，还开发了一个原型致动器和一个实验测量系统，以评估所提出的压电致动器的运行性能。当驱动频率为 475 Hz、锁定力为 5 N 时，致动器的运动速度最大可达 5.65 mm s-1，最大水平负载可达 113 g；当输入频率为 1 Hz、输入最低启动电压为 8 V 时，最小位移分辨率为 30 nm。实验结果、理论计算和有限元模拟结果的对比分析表明了结构设计的可行性。

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

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

期刊介绍： Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.