Open AccessDynamics of a nonlinear energy harvester with subharmonic responses
Author(s) -
Grzegorz Litak,
Bartłomiej Ambrożkiewicz,
Piotr Wolszczak
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1736/1/012032
Subject(s) - harmonics , resonator , phase portrait , acoustics , cantilever , beam (structure) , nonlinear system , physics , piezoelectricity , energy harvesting , transducer , magnet , excitation , energy (signal processing) , materials science , optics , voltage , bifurcation , composite material , quantum mechanics
A frequency transmission band of the nonlinear energy harvester shall be studied numerically. For the analysis, the nonlinear piezoelectric energy harvesting system based on a cantilever elastic beam has been applied to harvest the kinetic energy of the moving frame. We used a double-well potential induced by permanent magnets for a ferromagnetic beam resonator. A piezoelectric patch attached along the beam was used as a transducer of the mechanical into electrical energy. It occurred that the system could work in a wide interval of frequency beyond the linear resonance. Besides the response with a period of excitation, solutions with dominating sub-harmonics of the harmonic inertial force excitation have been found. Particular solutions were illustrated, classified, and discussed using phase portraits and Fourier spectra of the output signals.