低频激励下压电俘能器的簇发振荡和俘能效率分析

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中图分类号：0322 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202309003

Bursting oscillation and energy capture efficiency analysis of piezoelectric energy harvester under low frequency excitation

QIAN Youhua，REN Meirong （School of Mathematical Sciences，Zhejiang Normal University，Jinhua 321oO4，China）

Abstract：Environmental vibrationenergyisa kindofrenewable andcleanenergy withabundantreservesand widedistribution. Throughenergyharvestingtechnology，themechanicalenergyintheenvironmentisconvertedintoelectricalenergytopowerlow powerelectronicdevicesandwirelessensornetworks，whichisanefectivesolutiontobreakthelimitationsoftraditionalpower supplymethods.Intispape，theurstingoslltonandenergycaptureeficiencyofmechanicalonliearmultistablepiezelec triccantileverbeamdevicearestudiedunderlowfrequency excitation.Byanalyzing thepotentialenergyof thesystem，itcanbe seenthatthesystemhas multi-stablecharacteristicswiththechangeofsystem parameters.According tothefastandslowdynamic analysis method，theexteralexcitationtermisregardedasaslowvariableandcontrolparametertoadjustthedynamicbehaviorof thefastubsystem，andthetimehistorydiagram，phasediagramandtransitionphasediagramofthesystemareobtained.Themo tionstateandenergycaptureperformanceof thesystemunderlowfrequencyexcitationareanalyzedbynumericalmethod.There sultsshowthatthesystemexistsburstingoscilltionunderlowfrequencyexcitation，andthesystemhasgoodenergycapturechar acteristics whenthesystemisbistable.Inadition，the time-delayfeedbackcontrolcancontroltheclusteringphenomenonandensure the stable operation of the system.

Keywords：lowfrequencyexcitation;burstingoscilation;fastslowdynamics;energyharvesting;time-delayfeedbackcontrol

能量收集是当今工程科学中的一个热门领域，从低频振动中捕获能量是俘能器应用的关键挑战之二[1-2]。（剩余13717字）