Optimisation of Broadband Energy Harvesters Using Bistable Composites

使用双稳态复合材料优化宽带能量收集器

• 批准号: EP/J014389/1
• 负责人: Hyunsun Kim
• 金额: $ 47.66万
• 依托单位: University of Bath
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2012
• 资助国家: 英国
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FJ014389%2F1
• 关键词: Optimisation; Broadband; Energy; Harvesters; Using

This proposal will develop optimum broadband energy harvesters at the large/meso-scale by creating an optimisation methodology. This will be achieved by bistable composite laminates with piezoelectric materials converting mechanical vibration to electrical energy.Energy harvesting is an active research area developing ways of capturing energy from the external environment to power low energy electronics such as wireless sensor networks. One source of energy is vibration and piezoelectric materials are commonly used to convert mechanical vibration to electrical energy. The current state-of-the-art devices are designed to capture electrical energy at resonant frequencies. Whilst this works well in a well-controlled frequency environment, the harvesting performance falls dramatically outside the resonant frequencies and the resonant frequencies of a structure can quickly become unattainable as a device becomes small or large. This limits the application areas where vibratory energy harvesting devices can be used. The proposed bistable composite mechanism has recently been discovered by Inman (Co-I) to have an excellent harvesting performance over a range of frequencies due to its nonlinear dynamics. Bistable composite plates have an inherent bistability arising from anisotropic material properties of an asymmetrical layup. These bistable composites have been extensively studied in the context of piezo-actuated morphing structures in recent years and Kim (PI) and Bowen (Co-I) introduced the first and the only optimisation methodology for bistable composites in 2011. The project combines these expertise together with mixed signal electronics of Clarke (Co-I) to develop broadband energy harvesters suitable for ambient vibration. The National Physical Laboratory (NPL) and Perpetuum will support this project via their experimental expertise, facilities and data on the industrial and customers' needs.The complex physics of nonlinear bistable composites is difficult to understand and design, and the optimisation methodology for bistable composites recently developed by the applicants offers a systematic exploration of the design space to find the optimum combination of size, thickness and stacking sequence of fibre orientations. Building on from this foundation, the project will develop static and dynamic models of bistable enegy harvesting composites supported by experimental investigations and formulate an optimisation methodology which will be used to design and build demonstrators based on real world applications.There are three main challenges which will be addressed in this project:(1) The nonlinearity of the system behaviour, multiple equilibrium states of bistability, piezoelectric configuration and discrete composite lay-ups all present significant scientific challenges. The proposed research takes a novel approach of optimisation to account for the complex interaction of physics and offers engineers a methodology for designing bistable broadband energy harvesters for any given requirements. (2) No research to date has studied the role of nonlinearities in bistable energy harvesting. We will explore this in the modelling of energy harvesting performance including dynamic nonlinearity with experimental characterisation of coupled electromechanical properties.(3) One popular mechanism for generating bistability is via an external electromagnetic field which can be cumbersome and obtrusive to the surrounding system and the electrical components. Bistability is inherent to asymmetrical composite laminates, therefore the resulting system can be more compact and easily installed.

该提案将通过创建优化方法来发展大/中尺度的最佳宽带能量收获者。这将是通过可将机械振动转换为电能的压电材料的Bistable Rement层压板来实现的。能量收获是一个主动研究区域，开发了从外部环境到电力低能电子设备（如无线传感器网络）捕获能量的方法。一种能源是振动，压电材料通常用于将机械振动转换为电能。当前的最新设备旨在捕获谐振频率的电能。尽管这在良好的控制频率环境中效果很好，但收获性能急剧下降到谐振频率之外，并且随着设备变大或大型，结构的谐振频率可能会很快变得无法实现。这限制了可以使用振动能量收集设备的应用区域。 Inman（Co-​​I）最近发现了所提出的Bistable复合机制，由于其非线性动力学，在一系列频率上具有出色的收获性能。双板复合板具有不对称上型的各向异性材料特性引起的固有双重性。近年来，这些双态复合材料已在压电驱动的变形结构的背景下进行了广泛的研究，而Kim（PI）和Bowen（Co-​​I）在2011年引入了第一个和唯一的可bistable Composites的优化方法。该项目将这些专业知识与Clarke（CO-I）的混合信号（COR-I）相结合，以开发宽带能量vibr，以发展宽广的范围。国家物理实验室（NPL）和Perpetuum将通过其实验专业知识，工业和客户需求的数据来支持该项目。非线性双重复合材料的复杂物理学很难理解和设计，以及申请人最近开发的Bissable Copos材料的优化方法，可为您提供了序列的系统，可以构成尺寸和尺寸的尺寸和stat的系统，并提供了厚度的构造，并提供了厚度的构造。 Building on from this foundation, the project will develop static and dynamic models of bistable enegy harvesting composites supported by experimental investigations and formulate an optimisation methodology which will be used to design and build demonstrators based on real world applications.There are three main challenges which will be addressed in this project:(1) The nonlinearity of the system behaviour, multiple equilibrium states of bistability, piezoelectric configuration and discrete composite lay-ups所有人都面临着重大的科学挑战。拟议的研究采用了一种新颖的优化方法来说明物理学的复杂相互作用，并为工程师提供了一种针对任何给定要求设计双宽带能量收割机的方法。 （2）迄今为止尚未研究非线性在双态能量收集中的作用。我们将在能量收集性能的建模中探讨这一点，包括动态非线性，并具有耦合机电特性的实验表征。（3）一种通过外部电磁场产生双稳定性的一种流行机制，它可能笨拙且对周围系统和电气组件变得笨拙且令人毛骨悚然。双态性是不对称复合层压板固有的，因此所得系统可以更紧凑且易于安装。

项目成果

Optimal configurations of bistable piezo-composites for energy harvesting

• DOI: 10.1063/1.3693523
• 发表时间: 2012-03-12
• 期刊: APPLIED PHYSICS LETTERS
• 影响因子: 4
• 作者: Betts, D. N.;Kim, H. A.;Inman, D. J.
• 通讯作者: Inman, D. J.

Nonlinear dynamics of a bistable piezoelectric-composite energy harvester for broadband application

• DOI: 10.1140/epjst/e2013-01944-6
• 发表时间: 2013-09-01
• 期刊: EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
• 影响因子: 2.8
• 作者: Betts, D. N.;Bowen, C. R.;Inman, D. J.
• 通讯作者: Inman, D. J.

Modelling the dynamic response of bistable composite plates for piezoelectric energy harvesting

• DOI: 10.2514/6.2014-0154
• 发表时间: 2014-01
• 作者: D. Betts;R. Guyer;P. L. Bas;C. Bowen;D. Inman;H. Kim

Investigation of bistable piezo-composite plates for broadband energy harvesting

• DOI: 10.1117/12.2009101
• 发表时间: 2013-04
• 作者: D. Betts;C. Bowen;H. A. Kim;N. Gathercole;C. Clarke;D. Inman

Topology optimization of nonlinear periodically microstructured materials for tailored homogenized constitutive properties

• DOI: 10.1016/j.compstruct.2021.113729
• 发表时间: 2021-03-29
• 期刊: COMPOSITE STRUCTURES
• 影响因子: 6.3
• 作者: Behrou, Reza;Ghanem, Maroun Abi;Boechler, Nicholas
• 通讯作者: Boechler, Nicholas