BROADBAND CONCEPT OF ENERGY HARVESTING IN BEAM VIBRATING SYSTEMS FOR POWERING SENSORS
Andrzej Rysak 1  
,   Michael Müller 2  
,   Marek Borowiec 1  
,   Jarosław Zubrzycki 1  
,   Grzegorz Litak 1  
,   Anna Godlewska-Lach 1  
,   Volker Wittstock 2  
 
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1
Faculty of Mechanical Engineering, Lublin University of Technology, 20-618 Lublin, Poland
2
Technische Universität Chemnitz, Institut für Werkzeugmaschinen und Produktionsprozesse Reichenhainer, 09126 Chemnitz, Germany
Publication date: 2014-09-09
 
Adv. Sci. Technol. Res. J. 2014; 8(23):62–67
 
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ABSTRACT
Recent demand for powering small sensors for wireless health monitoring triggered activities in the field of small size efficient energy harvesting devices. We examine energy harvesting in an aluminium beam with a piezoceramic patch subjected to kinematic harmonic excitation and impacts. Due to a mechanical stopper applied, inducing a hardening effect in the spring characteristic of the beam resonator, we observed a broader frequency range for the fairly large power output. Impact nonlinearities caused sensitivity to initial conditions and appearance of multiple solutions. The occurrence of resonant solution associated with impacts increased efficiency of the energy harvesting process.