低頻激勵下壓電俘能器的簇發(fā)振蕩和俘能效率分析

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中圖分類號：0322 文獻標志碼：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

能量收集是當今工程科學中的一個熱門領域，從低頻振動中捕獲能量是俘能器應用的關鍵挑戰(zhàn)之二[1-2]。（剩余13717字）