Dynamics of a nonlinear energy harvester with subharmonic responses


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 signal.



Grzegorz Litak, Bartłomiej Ambrożkiewicz, Piotr Wolszczak

This paper was published in: l 2021 J. Phys.: Conf. Ser. 1736 012032

To read full text, please visit publisher site or download pdf file.

ehDialog This work was supported by the program of the Ministry of Science and Higher Education in Poland under the project DIALOG 0019/DLG/2019/10 in the years 2019-2021.