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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.
In this study, we investigate the nonlinear dynamics of a kinetic energy harvester featuring a single degree-of-freedom
magneto-piezoelectric harvester with a double-well potential resonator. A detailed analysis of the simulation results revealed
the influence of initial conditions on the average power output as we varied the frequency of the external force, noting the
emergence of coexisting solutions. We identified three initial conditions corresponding to regions with distinct power outputs
and analyzed the relationship between average power and system dynamics. Our findings showed that at higher excitation
frequencies, inherent subharmonics emerged due to the multi-stable potential. By applying the discrete Meyer wavelet
transform for signal processing, the filtered output signal retained approximately 93% of the original signal’s power with
the subharmonics, closely matching the optimal frequency response. Wavelet filtering allows for a clearer identification of
subharmonics, which plays a crucial role in optimizing performance.