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一种新型带螺纹夹紧机构的压电蠕动驱动器的建模与设计优化

Modeling and Design Optimization of a New Piezoelectric Inchworm Actuator with Screw Clamping Mechanisms.

作者信息

Sun Haichao, Shi Yunlai, Wang Qiang, Li Xing, Wang Junhan

机构信息

State Key Laboratory of Mechanics and Control of Mechanical Structure, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

School of Electrical and Mechanical Engineering, Pingdingshan University, Pingdingshan 467000, China.

出版信息

Micromachines (Basel). 2022 Nov 22;13(12):2038. doi: 10.3390/mi13122038.

DOI:10.3390/mi13122038
PMID:36557337
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9781161/
Abstract

A new piezoelectric inchworm actuator with screw clamping mechanisms has been developed recently for the wing folding mechanism of a small unmanned aircraft where the actuator power density is a great concern. Considering that the prototype actuator was designed just with engineering intuition and the performance optimization through experimental developments would take a vast amount of cost and time, a mathematical model was developed to investigate the actuator's critical design parameters and optimize its presently undesirable performance. Based on the lumped parameter method reported previously, and taking full account of the detailed modeling of the complex actuator housing and the actual nonlinear behaviors from the high-force contact and friction occurring at the screw-nut interface, as well as the output performance of the main drive elements including the piezoelectric stack and hollow ultrasonic motors (HUSMs), this model was built and then was experimentally verified for its accuracy and availability. Finally, nine design parameters were studied for their individual effect on the actuator's output using the proposed model. The simulation results indicate that the performance can be considerably improved by performing a slight modification to the prototype, and the dynamic modeling and parameter optimization methods used in this study can also serve as a useful reference for the design of similar piezoelectric inchworm actuators with intermittent clamping behaviors.

摘要

最近，一种带有螺旋夹紧机构的新型压电尺蠖式致动器被开发出来，用于小型无人机的机翼折叠机构，在该机构中，致动器的功率密度备受关注。鉴于原型致动器只是基于工程直觉设计的，并且通过实验开发来优化性能将耗费大量成本和时间，因此开发了一个数学模型来研究致动器的关键设计参数，并优化其目前不理想的性能。基于先前报道的集总参数法，充分考虑了复杂致动器外壳的详细建模以及螺母界面处高力接触和摩擦产生的实际非线性行为，以及包括压电叠堆和空心超声电机（HUSM）在内的主驱动元件的输出性能，建立了该模型，并通过实验验证了其准确性和可用性。最后，使用所提出的模型研究了九个设计参数对致动器输出的各自影响。仿真结果表明，对原型进行轻微修改可以显著提高性能，并且本研究中使用的动态建模和参数优化方法也可为设计具有间歇夹紧行为的类似压电尺蠖式致动器提供有用参考。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/05520188dafd/micromachines-13-02038-g015.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/65f60e45363c/micromachines-13-02038-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/905bdb9922c6/micromachines-13-02038-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/284b5182a23f/micromachines-13-02038-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/6d12ca58577e/micromachines-13-02038-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/a03cdc64e2b3/micromachines-13-02038-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/4a08afc1f662/micromachines-13-02038-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/bfc125216eb2/micromachines-13-02038-g007.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/65f60e45363c/micromachines-13-02038-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/4002089d4b5a/micromachines-13-02038-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ae/9781161/05520188dafd/micromachines-13-02038-g015.jpg

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