可调势阱型三稳态压电能量采集器的动力学特性研究

打开文本图片集

中图分类号：TN384 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202308032

Abstract：Inodertoimprovethedynamicoutputperformanceandenvironmentaladaptabiltyofthetristablepiezoelectricenergy harvester（TPEH），anewflexible tristable piezoelectricenergyharvester（FTPEH）withdoubleflexibleauxiliarybeamforealtimeadjustingtepotenalwelldepthandbarrerheightisproosedBasedonthetradiionalmagneticcoupling rstablepiezolec tric energyharvester，twoauxiliaryflexible beams withthesamestructureandsizeareintroduced，andthetwo external magnets arefixedatthetipndsoftetwouxiliarflexiblebeams.Whentheharvesterisexcitedbytheextealexcitation，thetwouilia rybeamsoscllte with slightamplitudeinthehorizontaldirection，thus thehorizontaldistancebetweentheexteral magnetsand thtip magnetofthepiezoelectriccantileverbeamcanbeadjustedinreal-time，soastotunethepotentialenergywelldepthnd barrierheight，resulting inimprovingthedynamicoutputperformanceandenvironmentaladaptabity.Theelectromechanicalcou plingdynamic modeldescribingthedynamicresponsesofthenewtri-stablepiezoelectricenergyharvesteris established basedon EulerBeroulitheoryandHamiltonprinciplendtheinfluencesofsystemparametersonthenonlinearmagneticforceanddynamicperformancearesimulatedandanalyzed.Comparedtotheraditionaltristableharvester，thenewtrstableharvesterhasawider bandwidth of inter-well motion and lower excitation for jumping from intra-well motion to inter-well motion.

Keywords：tristablepiezoelectricenergyharvester；nonlineardynamiccharacteristics；variablepotentialenergywellauxiliary flexiblebeam

随着微电子技术和微机电一体化技术的高速发展，无线电子器件和设备越发小型化、轻量化和低功耗化，且广泛应用于通信、医疗、军事、航空航天、汽车和工业工程等领域。（剩余15791字）