000021715 001__ 21715
000021715 005__ 20170622131301.0
000021715 04107 $$aeng
000021715 046__ $$k2017-06-15
000021715 100__ $$aPereira, Tiago Leite
000021715 24500 $$aENERGY HARVESTING IN A NONLINEAR SYSTEM UNDER HARMONIC AND RANDOM EXCITATIONS

000021715 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021715 260__ $$bNational Technical University of Athens, 2017
000021715 506__ $$arestricted
000021715 520__ $$2eng$$aSmart material has the ability to convert energy between two distinct physical domains. Piezoelectric material are an example of this material, the vibration-based energy harvesting using piezoelectric elements is possible by exploring the direct effect, where the piezoelectric material is able to convert mechanical in to electrical energy. This application can be very useful for applications in powering small electronic devices. The energy harvesting system presented in this work is a magnetoelastic structure that consists of a ferromagnetic cantilevered beam with two permanent magnets, one located in the free end of the beam and the other at a vertical distance d from the beam free end. In order to use this device as a piezelectric power generator, two piezoceramic layers are attached to the root of the cantilever and a bimorph generator is obtained. The piezomagnetoelastic structure is subjected to a combination of harmonic and random excitations. The parameter Noise-to-Signal Ratio (NSR) is used in order to quantify different combinations of the forcing terms. A method to evaluate the harvested energy and the performance of the piezomagnetoelastic structure is proposed. The method is applicable both to deterministic and to non-deterministic signals and is based on the Power Spectral Density (PSD) of the input, dimensionless force, and the output signal, dimensionless electrical voltage. Numerical simulations are carried out identifying better combinations of harmonic and random excitations for energy harvesting purposes.

000021715 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021715 653__ $$aPiezoelectric, nonlinear system, energy harvesting, random excitation

000021715 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021715 720__ $$aPereira, Tiago Leite$$iSavi, Marcelo Amorim$$iFabro, Adriano Todorovic$$iPaula, Aline Souza De
000021715 8560_ $$ffischerc@itam.cas.cz
000021715 8564_ $$s1154696$$uhttps://invenio.itam.cas.cz/record/21715/files/17603.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS04] Vibration energy harvesting
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000021715 962__ $$r21500
000021715 980__ $$aPAPER