Numerical study of parameters influence over the dynamics of a piezo-magneto-elastic energy harvesting device

Abstract

Abstract. This work deals with the study of a piezoelectric energy harvesting device, aiming to identify parameters value that produce chaotic and non-chaotic behavior. Two different initial conditions sets are analysed. For each one, bifurcation diagrams where forcing amplitude and excitation frequency are varied, are computed and analysed, showing the existence of chaotic and regular regions.

Nonlinear Characterization of a Bistable Energy Harvester Dynamical System

“…The same nonlinearities responsible to improve the devices energetic performance, on the other hand, contributes to raise the systems dynamics com- plexity, even leading to chaotic and unstable responses for some operational configurations. In [27,28,36] the authors demonstrates the presence of hysteresis effects on the nonlinear dynamical response of a piezo-magneto-elastic energy harvesting system, that is associated to the co-existence of multiple solutions, for the same operational conditions depending on the external forcing parameters values. Such phenomena highlight the importance of a detailed investigation of the nonlinear dynamics of devices in order to improve the comprehension of its behavior and limitations.…”

STONEHENGE — Suite for nonlinear analysis of energy harvesting systems

“…The instantaneous power can be also obtained with aid of this module. In [8,9] the authors use time series analysis to assess the effects of excitation amplitude and frequency on the harvester.…”

“…These modules allow us to characterize the dynamic response as periodic or chaotic and map its sensibility concerning the initials conditions. In [8,9], bifurcation analysis is carried out to identify excitation conditions that lead to chaotic behavior, while [12,13] employ the basins of attraction to study behavior under different initial conditions. These studies possibly contain the largest collection of basins of attraction in the open literature (a few dozen).…”

Dynamic analysis and characterization of a nonlinear bi-stable piezo-magneto-elastic energy harvester

“…Such devices converts environmental energy, available for free, into electrical power to be used in the application of interest. Due to the immense possibility of applications, together with the theoretical challenges associated with the analysis of the underlying nonlinear behavior, these dynamical systems have been object of study of several recent works [3][4][5][6][7][8].…”