Response Analysis of Nonlinear Viscoelastic Energy Harvester with Bounded Noise Excitation

Abstract

Energy harvesting has become a popular topic in recent years. A number of studies have been conducted in the field of vibration energy harvesting system (VEHS). However, few studies have concentrated on viscoelastic energy harvesters driven by bounded noise excitation. In this paper, the stochastic response of a viscoelastic energy harvester subjected to bounded noise is discussed. Approximate solutions of the system were derived by utilizing the method of multiple scales, and the expressions of the mean square voltage (MSV) and mean output power (MOP) were obtained. The relation between the detuning frequency and first-order steady moment was first revealed. The effectiveness of the approach was verified by a good agreement between theoretical results and numerical results. Furthermore, the variations in the detuning frequency can result in the stochastic jump phenomenon, and stochastic bifurcation is induced with the changes in the viscoelastic parameter and detuning frequency. Finally, the impacts of system parameters on the MSV and the MOP were also analyzed.

Dynamic responses of an energy harvesting system based on piezoelectric and electromagnetic mechanisms under colored noise

“…Recently, there are several papers [38][39][40][41] focused on vibration EHSs with viscoelastic materials. In Refs.…”

“…In Refs. [40,41] the authors studied a single type of piezoelectric EHSs by applying the multi-scales method. The vital difference between our study and the above-mentioned studies is that we consider a hybrid vibration EHS subjected to narrow-band noise excitation by employing the multi-scales method.…”