Nonlinear Dynamics in Vibration-based Piezoelectric Energy Harvesting

基于振动的压电能量收集中的非线性动力学

• 批准号: 155485-2013
• 负责人: Zu, Jean
• 金额: $ 3.28万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=569471
• 关键词: Nonlinear; Dynamics; Vibration; based; Piezoelectric

The research program aims to study the nonlinear dynamics in vibration-based piezoelectric energy harvesters to achieve wide bandwidth, high power output, small size, and low cost. Vibration-based energy harvesters, capable of scavenging ambient vibrations and converting into electricity, are promising to replace batteries as a main power supply for small autonomous electronic devices. There are two main advantages for such energy harvesters: no replacement and recharging required; no environmental pollution caused by waster batteries. Among different types of vibration-based energy harvesters, piezoelectric energy harvesters (PEHs) are the most promising due to its larger power density. In spite of the promise of PEHs, existing PEHs suffer from major drawbacks such as small power output and narrow frequency bandwidth. Various efforts have been made to address the problems. One of the most promising ways to improve the performances of PEHs is to introduce nonlinear mechanisms into the original linear PEHs and effectively utilize nonlinear dynamic properties. The proposed research program will apply two novel and unique nonlinear mechanisms, bistable-structure-based forced vibrations and structure-based self-excited vibrations, to PEHs to enhance power output and widen frequency bandwidth. The long-term objective is to design and develop effective PEHs for wide applications. The short-term objectives include design and optimization of bistable-structure-based PEHs, design and development of structure-based self-excited PEHs, and development of techniques to integrate PEHs into small autonomous electronic devices. The research will contribute to developing nonlinear modeling, analysis, and optimization tools for piezoelectric energy harvesters and will significantly enhance the PEH technology. Moreover, the research program will train several HQPs in multi-disciplinary areas of importance to industry.

本课题旨在研究基于振动的压电能量采集器的非线性动力学，以实现宽带宽、高功率输出、小体积和低成本。基于振动的能量采集器能够清除环境振动并将其转化为电能，有望取代电池，成为小型自主电子设备的主要电源。这种能量收集器有两个主要优点：不需要更换和充电；无废电池对环境的污染。在不同类型的基于振动的能量采集器中，压电能量采集器（PEHs）因其更大的功率密度而最有前途。