A Novel Concept for Micro-Power Generation Using Flow-induced Self-excited Oscillations

1000667 Mohammed Daqaq Clemson大学该奖项的目标是调查和描述无线传感和通信的微型发电可扩展概念的物理基础。受音乐演奏口琴的启发，口琴在空气吹动时通过簧片的振荡产生音调，该概念利用嵌入空腔中的压电式悬臂梁的流动诱导自激振荡，将风能转化为电能。为了实现这一目标，具体的研究包括：i)将连续系统振动、压电学和流体力学的理论与计算分析相结合，建立控制系统非线性气动-机电响应的降阶数学模型；以及ii)从非线性系统动力学中实施分析、半解析和数值方法，以了解设计参数在机电转换中的相互关联的作用，以及如何优化它们以提高性能。这项研究的结果将为从流动诱导的振荡中收集能量所需的基本理解奠定基础，并将为确定设计参数在能量收集所需的极限环振荡中所起的未知作用提供工具。基于拟议概念的微型发电机将有助于为许多重要电子系统的自主运行提供动力并扩大其范围，例如用于无线通信、遥感和健康监测网络的系统。研究结果与无数的教育活动有关，并将导致提供新的研究生课程。其中包括一项创造性的调查项目和一项面向当地社区的外联倡议。还提议作出广泛努力，为代表不足的学生和少数族裔学生提供类似的经历。

Abstract1000667Mohammed DaqaqClemson University The goal of this award is to investigate and delineate the physical underpinnings of a scalable concept for micro power generation for wireless sensing and communication. Inspired by music-playing harmonicas that create tones via oscillations of reeds when subjected to air blow, the proposed concept exploits flow-induced self-excited oscillations of piezoelectric cantilever beams embedded within a cavity to transform wind energy into electricity. To achieve this goal, the specific investigations include i) integrating theories in continuous-systems vibrations, piezoelectricity, and fluid dynamics with computational analysis to develop a reduced-order mathematical model that governs the nonlinear aero-electro-mechanical response of the system; and ii) implementing analytical, semi-analytical, and numerical methodologies from nonlinear systems dynamics to understand the interconnected role that the design parameters play in the electromechanical transduction and how to optimize them for enhanced performance . Results of this research will build the fundamental understanding necessary for energy harvesting from flow-induced oscillations and will provide the tools to determine the unknown role that the design parameters play in the limit-cycle oscillations necessary for energy harvesting. Micro-power generators based on the proposed concept will aid in powering and extending the autonomous operations of many vital electronic systems such as those used in wireless communications, remote sensing, and health-monitoring networks. Research results are tied to a myriad of educational activities and will result in new graduate course offerings. These include a creative inquiry project and an outreach initiative to the local community. Extensive efforts are also proposed to provide underrepresented and minority students with similar experiences.