Enhanced vibration energy harvesting using nonlinear oscillations

Abstract

Results for the design and testing of an electromagnetic device that converts ambient mechanical vibration into electricity are presented. The design of the device is based on an L-shaped beam structure which is tuned so that the first two natural frequencies have a near two-to-one ratio which is referred to as an internal resonance or autoparametic condition. It is shown that in contrast to single degree-of-freedom, linear-dynamics-based vibration harvesters which convert energy in a very narrow frequency band the prototype can generate power over an extended frequency range when subject to harmonic, base displacement excitation.

Exploring the roles of standard rectifying circuits on the performance of a nonlinear piezoelectric energy harvester

“…Recently, internal resonance of nonlinear structures has attracted the interests [11][12][13][14] due to an energetic saturation vibration and enhanced energy transfer between modes that promote an exceptional wide-bandwidth harvesting performance [14].…”

Functionalization of Internal Resonance in Magnetically Coupled Resonators for Highly Efficient and Wideband Hybrid Vibration Energy Harvesting

“…Add to that the electromechanical complexity of the device and its electrical circuitry results in a higher cost of the device [ 2 , 27 ]. In addition to tuning mechanisms and multimodal configurations, several researchers have developed nonlinear harvesters [ 28 , 29 , 30 ] which are considered as an alternative approach to overcome the mentioned limitations. Nonlinearities are generally present in dynamic systems because of geometric or material properties [ 31 ].…”