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直驱式伺服阀双排弓型微位移放大器的建模与实验研究

Modeling and Experimental Study of Double-row Bow-type Micro-Displacement Amplifier for Direct-drive Servo Valves.

作者信息

Liu Guoping, He Zhongbo, Bai Guo, Zheng Jiawei, Zhou Jingtao, Chang Ming

机构信息

Army Engineering University Shijiazhuang Campus, Shijiazhuang 050003, China.

Unit 63926 of PLA, Beijing 100192, China.

出版信息

Micromachines (Basel). 2020 Mar 16;11(3):312. doi: 10.3390/mi11030312.

DOI:10.3390/mi11030312
PMID:32188151
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7143172/
Abstract

Giant magnetostrictive actuators (GMA) are widely used in the field of servo valves, but the displacement of GMA is limited, which renders meeting the requirements of large flow direct-drive electro-hydraulic servo valves (DDV) difficult. In order to solve these problems, this study proposes a double-row bow-type micro-displacement amplifier (DBMA), used to increase output displacement of GMA to meet the requirements. This study, by static analysis, analyzes the force of a flexure hinge based on theoretical mechanics and material mechanics, derives the stiffness matrix of the flexure hinge by the influence coefficient method, establishes the pseudo-rigid model, and derives the amplification ratio of a DBMA. Also, by kinetic analysis, using Castigliano's second theorem, a formula of equivalent stiffness and natural frequency of DBMA were derived and the influences of different parameters on them were analyzed, respectively. After that, we analyzed the amplifier using finite element method (FEM) simulation software and verified the model by manufacturing a prototype and building a test system. Theoretical calculations and experimental results showed that the amplification ratio of the DBMA fluctuated between 15.43 and 16.25. The natural frequency was about 305 Hz to 314 Hz and the response bandwidth was up to 300 Hz. The error among the theoretical, simulated, and experimental values was within 8%, supporting the accuracy of the model.

摘要

超磁致伸缩驱动器（GMA）在伺服阀领域有着广泛应用，但GMA的位移有限，这使得满足大流量直驱式电液伺服阀（DDV）的要求变得困难。为了解决这些问题，本研究提出了一种双排弓形微位移放大器（DBMA），用于增加GMA的输出位移以满足要求。本研究通过静态分析，基于理论力学和材料力学分析了柔性铰链的受力情况，采用影响系数法推导了柔性铰链的刚度矩阵，建立了伪刚体模型，并推导了DBMA的放大倍数。此外，通过动力学分析，利用卡氏第二定理推导了DBMA的等效刚度和固有频率公式，并分别分析了不同参数对它们的影响。之后，利用有限元法（FEM）仿真软件对该放大器进行了分析，并通过制作样机和搭建测试系统对模型进行了验证。理论计算和实验结果表明，DBMA的放大倍数在15.43至16.25之间波动。固有频率约为305Hz至314Hz，响应带宽高达300Hz。理论值、仿真值和实验值之间的误差在8%以内，证明了模型的准确性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/2f103febf9eb/micromachines-11-00312-g018.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/2f103febf9eb/micromachines-11-00312-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/38eb9758d57e/micromachines-11-00312-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/d3657a580854/micromachines-11-00312-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/1f22149c9c25/micromachines-11-00312-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/9c581045e651/micromachines-11-00312-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/322d6ad8e037/micromachines-11-00312-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/66ecce891b25/micromachines-11-00312-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/71da73541b6e/micromachines-11-00312-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/614f418debd9/micromachines-11-00312-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/daed4eec3b07/micromachines-11-00312-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/aea74936b489/micromachines-11-00312-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/7d96a3655876/micromachines-11-00312-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/d6546dae5067/micromachines-11-00312-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/deff41ce330c/micromachines-11-00312-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6546/7143172/2f103febf9eb/micromachines-11-00312-g018.jpg

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