Response Identification in a Vibration Energy-Harvesting System with Quasi-Zero Stiffness and Two Potential Wells

In this paper, the frequency broadband effect in vibration energy harvesting was studied numerically using a quasi-zero stiffness resonator with two potential wells and piezoelectric transducers. Corresponding solutions were investigated for system excitation harmonics at various frequencies. Solutions higher voltage output collected specific branches of power diagram. Both resonant solution synchronized responses subharmonic spectra found. The selected cases illustrated classified phase portrait, Poincaré section, recurrence plot (RP) approaches. Select quantification analysis (RQA) measures used to characterize discussed solutions.