Using Distributed Control to Achieve One-Way Wave Propagation in Acoustic Systems

使用分布式控制实现声学系统中的单向波传播

• 批准号: 1761300
• 负责人: Karl Grosh
• 金额: $ 36.47万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1761300&HistoricalAwards=false
• 关键词: Using; Distributed; Control; Achieve; Way

Acoustic waveguides - structures that guide sound waves - are ubiquitous and found in nature (for example, the ear canal) as well as in engineered consumer, industrial, and military products (for example, mufflers in automobiles). In this research, investigators will explore how a network of sensors, actuators and amplifiers can be used to improve control over transmission of sound, leading to highly directional acoustic waveguides. The target applications are in electronics, such as in cell phones. The process will involve a rigorous design-model-build-test process combining state-of-the-art theoretical and numerical modeling with new experimental techniques. Outreach to underrepresented students in engineering from the Atlanta University Center-Consortium of Historically Black Colleges and Universities will be realized through a two-summer internship in the Michigan Summer Training in Acoustics Researcher (M-STAR) program. Interns will team with PhD students to develop Cool Acoustics demonstration projects and take part in the project research.This new approach to waveguide design will require new analysis tools for a variety of purposes. This is due to the generation of a spatial delay differential equation (DDE) resulting from feedforward of the field and gradient information (unlike the time domain DDE, these equations are seldom studied). In order to fix the design space, Floquet-Bloch of these spatial systems will be modified. The analysis of stability, robustness, and effectiveness of the designs will be identified allowing for the most promising designs to be realized in hardware. The outcome of work is a new approach that has the potential to radically change how one-way wave propagation is achieved enabling new classes of acoustic systems and devices.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

声波导——引导声波的结构——在自然界（例如耳道）以及工程消费品、工业和军用产品（例如汽车中的消声器）中无处不在。 在这项研究中，研究人员将探索如何使用传感器、执行器和放大器网络来改善对声音传输的控制，从而产生高度定向的声波导。 目标应用是电子产品，例如手机。该过程将涉及严格的设计-模型-构建-测试过程，将最先进的理论和数值建模与新的实验技术相结合。 亚特兰大大学中心-历史上黑人学院和大学联盟的工程专业学生的外展活动将通过密歇根声学研究员暑期培训（M-STAR）计划的两个暑期实习来实现。实习生将与博士生合作开发酷声学演示项目并参与项目研究。这种新的波导设计方法将需要用于各种目的的新分析工具。 这是由于场和梯度信息的前馈产生了空间延迟微分方程 (DDE)（与时域 DDE 不同，这些方程很少被研究）。为了固定设计空间，Floquet-Bloch会对这些空间系统进行修改。 将确定设计的稳定性、鲁棒性和有效性的分析，以便在硬件中实现最有前途的设计。 工作成果是一种新方法，有可能从根本上改变单向波传播的实现方式，从而实现新型声学系统和设备。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Broadband nonreciprocal linear acoustics through a non-local active metamaterial

• DOI: 10.1088/1367-2630/ab8aad
• 发表时间: 2020-04
• 期刊: New Journal of Physics
• 影响因子: 3.3
• 作者: A. Sasmal;Nathan Geib;B. Popa;K. Grosh

Tunable nonlocal purely active nonreciprocal acoustic media

• DOI: 10.1103/physrevb.103.165427
• 发表时间: 2021-04
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Nathan Geib;A. Sasmal;Zhuzhu Wang;Yuxin Zhai;B. Popa;K. Grosh