BRIGE: Piezoelectric Energy Harvesting Shock Absorber

BRIGE：压电能量收集减震器

• 批准号: 1228139
• 负责人: Fengxia Wang
• 金额: $ 17.36万
• 依托单位: Southern Illinois University at Edwardsville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-01 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1228139&HistoricalAwards=false
• 关键词: BRIGE; Piezoelectric; Energy; Harvesting; Shock

This Broadening Participation Research Initiation Grant in Engineering (BRIGE) provides funding for the evaluation of a piezoelectric energy regeneration shock absorber. The piezoelectric energy regenerator, composed of several piezoceramic (PZT) unimorphs, will provide vibration suppression and generate energy from vibration. An electromechanical model is developed based on nonlinear composite thin beam theory and nonlinear constitutive law. An optimized design is obtained via parametric study. As system parameters of the energy regenerator vary, such as the geometric dimensions and the material properties, the variations in the amount of generated energy will be analyzed. The effect of the electromechanical nonlinearity and the geometric nonlinearity of the PZT unimorph on the efficiency of energy regeneration will be investigated. A novel electrical-mechanical combined energy harvest circuit, which can operate under two modes, is designed for obtaining maximum energy from a piezoelectric generator. The overall objective of this research is to better understand the electromechanical properties of piezoelectric materials; to design a shock absorber with good vibration suppression as well as high energy recovery efficiency.Piezoelectric energy harvesting as a green energy creation method provides an alternative option for alleviating the world energy stress. The success of the proposed study will bring to life a new generation of high energy efficiency cars with emission reduction, and hence improve our environmental conditions. This research will provide a comprehensive understanding of the electromechanical properties of piezoelectric material. The study of the power performances in nonlinear dynamical regime will especially impact material science and bring novel ideas to the design of future piezoelectric generators. The study of the nonlinear domain switching behavior of the constitutive model will accelerate the development of boundary value problems and domain wall dynamics. Results from this project may find applications in areas of mechanical, biomedical, and information technology. This project serves underrepresented students at different levels: a) workshops for African-American high school students and their teachers will be developed, b) female graduate students and a minority undergraduate student will be recruited to work on this project, and c) a women in engineering research symposium will be organized to serve as a career mentoring tool for female students.

这项扩大参与研究启动助学金(Brige)为评估一种压电能量再生减震器提供了资金。由多个压电陶瓷(PZT)单晶片组成的压电能量再生器将起到抑制振动的作用，并从振动中产生能量。建立了基于非线性组合薄梁理论和非线性本构关系的机电模型。通过参数研究得到了优化设计方案。随着能量回热器系统参数的变化，如几何尺寸和材料特性，将分析发电量的变化。研究了PZT单晶片的机电非线性和几何非线性对能量再生效率的影响。设计了一种新型的机电联合能量采集电路，该电路可以工作在两种模式下，以获得最大的压电式发电机能量。本研究的总体目标是更好地了解压电材料的机电性能，设计一种具有良好的减振和能量回收效率的减振器。作为一种绿色能源创造方法，压电能量收集为缓解世界能源压力提供了一种替代选择。这项拟议研究的成功，将为新一代高能效、减排的汽车带来活力，从而改善我们的环境条件。这一研究将使人们对压电材料的机电性能有一个全面的了解。非线性动力特性的研究将对材料科学产生重大影响，并为未来的压电式发电机的设计带来新的思路。对本构模型的非线性磁通行为的研究将加速边值问题和磁畴壁动力学的发展。该项目的成果可能会在机械、生物医学和信息技术领域得到应用。该项目为不同级别的代表人数不足的学生提供服务：a)将为非裔美国高中生及其教师举办讲习班；b)将招募女研究生和一名少数族裔本科生参与该项目；c)将组织一次工程研究妇女专题讨论会，作为女学生的职业指导工具。