Modeling and optimization of a wide-band piezoelectric energy harvester for smart building structures  

作　　者：Prateek Asthana Gargi Khanna 

机构地区：[1]Electronics and Communication Engineering Department National Institute of Technology Hamirpur,Himachal Pradesh,India

出　　处：《International Journal of Modeling, Simulation, and Scientific Computing》2020年第2期31-38,共8页建模、仿真和科学计算国际期刊（英文）

摘　　要：Piezoelectric energy harvesting refers to conversion of mechanical energy into usable electrical energy.In the modern connected world,wireless sensor nodes are scattered around the environment.These nodes are powered by batteries.Batteries require regular replacement,hence energy harvesters providing continuous autonomous power are used to power these sensor nodes.This work provides two different fixation modes for the resonant frequency for the two modes.Variation in geometric parameter and their effect on resonant frequency and output power have been analyzed.These harvesters capture a wide-band of ambient vibrations and convert them into usable electrical energy.To capture random ambient vibrations,the harvester used is a wide-band energy harvester based on conventional seesaw mechanism.The proposed structure operates on first two resonant frequencies in comparison to the conventional cantilever system working on first resonant frequency.Resonance frequency,as well as response to a varying input vibration frequency,is carried out,showing better performance of seesaw cantilever design.In this work,modeling of wide-band energy harvester with proof mass is being performed.Position of proof mass plays a key role in determining the resonant frequency of the harvester.Placing the proof mass near or away from fixed end results in increase and decrease in stress on the piezoelectric layer.Hence,to avoid the breaking of cantilever,the position of proof mass has been analyzed.

关 键 词：Finite element modeling OPTIMIZATION seesaw energy harvester wide-band energy harvester PIEZOELECTRIC 

分 类 号：O17[理学—数学]