Modeling and Characterization of a Tunable Dual-Frequency Piezoelectric Energy Harvester

Simulation and Characterization of a Nonlinear Dual-Frequency Piezoelectric Energy Harvester

“…The patch dimensions are 60 × 10 × 0.2 mm 3 on the outer beams and 48 × 18 × 0.2 mm 3 for the inner beam as depicted in Figure 1. The structure is under a harmonic base acceleration of 0.5 g. The material properties of the piezoelectric ceramic originate from PIC-255, supplied by PI Ceramics [6]. These results demonstrate that the considered resonator amplifies significantly the displacement at the two first fundamental modes, leading to a significant mechanical strain distribution in the beam segments.…”

“…In [5] we presented a full experimental characterization of a single-and dual-frequency resonator with the potential use as an energy harvester. Recently, in [6], we studied the behavior of a dual-frequency piezoelectric energy harvester incorporating permanent magnets for bi-directional frequency tuning.…”

System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

“…This section reviews shortly the dual-frequency harvester proposed in [32][33][34] together with its tuning approach. Continuing our modelling effort from [34] we advance the finite element (FE) model into a system-level model.…”

“…In [32,34] we presented a description of the magneto-static simulations, which enabled us to derive the magnetic forces involved in the frequency tuning. The same forces have been considered in the current system-level model.…”

“…Nammari et al [30] proposed an enhanced novel design of a nonlinear magnetic levitation-based energy harvester, where the tuning effect is achieved by the magnetic and the oblique springs. In [31][32][33][34] we studied a dual-frequency piezoelectric energy harvester incorporating permanent magnets for bidirectional frequency tuning and presenting an increased useable frequency range compared to standard harvesters. Other groups used different bandwidth broadening strategies, for example, shunted piezoelectric control systems have been proposed in [35,36].…”