ENERGY HARVESTING FROM HUMAN MOTION BY IMPACT-EXCITED BISTABLE BUCKLED BEAMS

摘要：

Energy harvesting from human motion faces with challenges including low-frequency and non-harmonic excitation.This paper presents a novel impact-excited energy harvesting system using a bilayer structure which is composed of a buckled piezoelectric beam and a rubber plate with a certain spatial separation.When the rubber plate is excited by the low frequency human gait impulse,it would touch the buckled piezoelectric beam and trigger the snap-through vibration of the beam through the up-conversion mechanism.The electromechanical response of the proposed nonlinear energy harvesting system under the standard low-frequency and non-harmonic gait excitation is studied by numerical simulations.The influences of the geometrical and physical parameters including the mechanical properties of the materials,separation distance of the bilayer structure and the excitation parameters are examined respectively.The appearances of the chaotic and periodic responses of the energy harvesting systems with different physical parameters are illustrated by the phase portraits,and time-domain images.Compared with intrawell and chaotic oscillations,high energy periodic interwell vibrations are demonstrated to greatly improve the energy harvesting performance.The results of the parameter analysis can be used to optimize the energy harvesting structure.

关键词： Energy harvesting Human motion Nonlinear behavior Bistable Up-conversion

作者: Zheng-qiu XIE C.A. Kitio KWUIMY Wen-bin HUANG

作者单位: The State Key Lab of Mechanical Transmissions, Chongqing University, Chongqing, 400044, China Department of Engineering Education, College of Engineering and Applied Science,University of Cincin

会议类型: 国际会议

会议名称: The 2016 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2016全国压电和声波理论及器件技术研讨会)

会议地点: 西安

会议语种:英文

页码: 150-154

在线出版日期: 2016-10-21（万方平台首次上网日期，不代表论文的发表时间）