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首页> 外文学位 >Numerical and experimental study of bio-inspired vibration sensing and isolation devices: Integration of biomimetics and 3D printing technology.
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Numerical and experimental study of bio-inspired vibration sensing and isolation devices: Integration of biomimetics and 3D printing technology.

机译：受生物启发的振动传感和隔离装置的数值和实验研究：仿生技术与3D打印技术的集成。

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摘要

Statocyst is the balancing and sensing organ of the cephalopods (octopus, squid and cuttlefish). Previous studies have shown the macula/statolith part of the statocyst is the linear acceleration sensing system of the water particle motion. Although a few differences primarily in gross morphology exist, the macula/statolith part of the statocyst shows a striking number of similarities in structure and function among different cephalopods. In this study, the macula/statolith part of the statocyst is investigated by means of mechanics method. Specifically, based on the geometry and material property of macula/statolith from three cephalopod species (Octopus vulgaris, Sepia officinalis and Loligo vulgaris), a second order dynamic oscillator model was used to simulate its frequency response to the water particle motion. The acceleration detection threshold spectra comparison between the modeling analysis and the experiment data verifies that the cephalopods are sensitive to the water particle motion (acceleration) in the low (infrasound) frequency range.;As an integral part of this research, the characteristics of kinocilia bundle which is the mechanoreceptive part of macula/statolith are also studied by interpreting the interaction between kinocilia bundle and statolith in a fluid-structure-interaction (FSI) numerical model. A parametric study of the kinocilia/statolith numerical model is conducted to improve the understanding of the sensing mechanism of the kinocilia bundle interaction with the statolith. Inspired by this interaction phenomenon, a bio-inspired vibration sensor and a bio-inspired isolation element are conceptually developed and numerically studied. The numerical simulation result implies that the frequency response behavior observed in the kinocilia bundle model from FSI analysis is also seen in both engineering designs, and this behavior could be equivalently described by the Maxwell model and SLS model for these two designs, respectively.;Lastly, by taking advantage of 3D printing technology, a prototype bio-inspired vibration sensor was fabricated in the lab and subsequently tested to characterize its sensing behavior. A comparison between the experimental data and predictions from a theoretical model suggests that the frequency response of the bio-inspired sensor design is equivalent to the convolution of the frequency response of a 2nd-order oscillator and the sensor's inner beam. This unique feature enables the development of two potential motion sensor designs (jerk sensor and velocity sensor).
机译：囊肿是头足类动物（章鱼，乌贼和乌贼）的平衡和感知器官。先前的研究表明，囊肿的黄斑/静止骨部分是水颗粒运动的线性加速度传感系统。尽管主要在总体形态上存在一些差异，但Statocyst的黄斑/ Statolith部分在不同的头足类动物之间在结构和功能上显示出惊人的相似性。在这项研究中，通过力学方法研究了囊肿的黄斑/静止期部分。具体而言，基于来自三种头足类（章鱼，乌贼墨和寻常的低聚类）的黄斑/静石的几何形状和材料特性，使用二阶动态振荡器模型来模拟其对水颗粒运动的频率响应。建模分析与实验数据之间的加速度检测阈值谱比较，验证了头足类动物在低频（次声）范围内对水颗粒运动（加速度）敏感。还通过在流体-结构-相互作用（FSI）数值模型中解释了毛虫束和石笋之间的相互作用，研究了作为黄斑/静止石的机械感受部分的束。进行了运动学/静态数值模型的参数研究，以增进对运动学与石料相互作用的传感机制的理解。受这种相互作用现象的启发，从概念上开发了生物启发式振动传感器和生物启发隔离元件并进行了数值研究。数值模拟结果表明，在两种工程设计中也都可以看到通过FSI分析在木乃伊束模型中观察到的频率响应行为，这两种设计可以分别用麦克斯韦模型和SLS模型等效地描述这种行为。通过利用3D打印技术，在实验室中制作了原型生物启发式振动传感器，随后对其进行了测试以表征其传感行为。实验数据和理论模型的预测值之间的比较表明，受生物启发的传感器设计的频率响应等于二阶振荡器的频率响应与传感器内部光束的卷积。这项独特的功能可以开发两种潜在的运动传感器设计（加速度传感器和速度传感器）。

著录项

  • 作者

    Shi, Feng.;

  • 作者单位

    University of Maryland, College Park.;

  • 授予单位 University of Maryland, College Park.;
  • 学科 Civil engineering.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 226 p.
  • 总页数 226
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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