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用于红外图像稳定的桥式压电致动器的设计、分析与实验

Design, Analysis and Experiment of a Bridge-Type Piezoelectric Actuator for Infrared Image Stabilization.

作者信息

Sun Mengxin, Feng Yong, Wang Yin, Huang Weiqing, Su Songfei

机构信息

Department of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China.

College of Mechanical Engineering and Automation, Huaqiao University, Quanzhou 361021, China.

出版信息

Micromachines (Basel). 2021 Sep 30;12(10):1197. doi: 10.3390/mi12101197.

DOI:10.3390/mi12101197
PMID:34683247
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8540165/
Abstract

Piezoelectric actuators are widely used in the optical field due to their high precision, compact structure, flexible design, and fast response. This paper presents a novel piezoelectric actuator with a bridge-type mechanism, which can be used to stabilize the images of an infrared imaging system. The bridge amplification mechanism is used to amplify the actuation displacement, and its structural parameters are optimized by the response surface method. The control strategy of the image stabilization system is formulated, and the overall structure of the infrared image stabilization system is designed according to the principle of image stabilization and the control strategy. The prototype was fabricated and verified by a series of experiments. In the test, the laminated piezoelectric ceramics are used as the driving element, and its maximum output displacement was about 17 μm under a voltage of 100 V. Firstly, the performance of the piezoelectric amplification mechanism was tested, and the maximum displacement of the piezoelectric micro-motion mechanism was 115 μm. The displacement amplification ratio of the mechanism was 5.7. Then, the step distance and response time of the micro-displacement mechanism were measured by inputting the stepping signal. When the input voltage increased to 3 V, 5 V, and 7 V, the stepping displacements of the mechanism were 2.4 μm, 4.1 μm, and 5.8 μm. Finally, the image stabilization effect of the designed mechanism was verified by imaging timing control and feedback signal processing.

摘要

压电致动器因其高精度、结构紧凑、设计灵活和响应快速而在光学领域得到广泛应用。本文提出了一种具有桥式机构的新型压电致动器，可用于稳定红外成像系统的图像。采用桥式放大机构来放大驱动位移，并通过响应面法对其结构参数进行优化。制定了图像稳定系统的控制策略，并根据图像稳定原理和控制策略设计了红外图像稳定系统的整体结构。制作了原型并通过一系列实验进行验证。在测试中，使用叠层压电陶瓷作为驱动元件，在100V电压下其最大输出位移约为17μm。首先，测试了压电放大机构的性能，压电微运动机构的最大位移为115μm，该机构的位移放大比为5.7。然后，通过输入步进信号测量微位移机构的步距和响应时间。当输入电压增加到3V、5V和7V时，该机构的步进位移分别为2.4μm、4.1μm和5.8μm。最后，通过成像定时控制和反馈信号处理验证了所设计机构的图像稳定效果。

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