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A PIEZOELECTRIC UNIMORPH POWER HARVESTER OPERATING WITH COUPLED EXTENSION AND FLEXURE MODES

Zi-yang LIAN  Lin HU  Jun CHENG  Yu-jue Wang  Hong-ping HU  Yuan-tai HU  Ji WANG  
【摘要】:We have set up a model of a piezoelectric unirnorph power harvester(PUPH).The PUPH consists of a piezoelectric layer and a metal layer.One end of the PUPH is fixed on a vibration base,the other end is connected by a concentrated mass.The PUPH scavenges energy from coupled extension and flexure vibration when excitation is inclined with the horizontal direction.We present a theoretical analysis on the basic behaviors of the PUPH by the theory of linear piezoelectricity.The theoretical results agree well with that of finite element method.

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