An Extended-Range Vibration Energy Harvester Based on Internal Resonance

Investigation on the characteristics of a novel internal resonance galloping oscillator for concurrent aeroelastic and base vibratory energy harvesting

“…Internal resonance is a phenomenon in nonlinear multi-modal structures, which has drawn increasing attention in recent years for pure base vibration energy harvesting. For multi-modal structures that possess integer or almost integer ratios of natural frequencies (e.g., pω 2 = qω 1 , p and q are integers), energy can be exchanged among the corresponding modes [35][36][37][38][39][40][41][42] due to the saturation phenomenon. The internal resonance phenomenon was firstly reported by Froude [41] who found that ships with natural frequency in pitch nearly twice the natural frequency in roll may have undesirable roll characteristics.…”

“…Internal resonance with quadratic and cubic nonlinearities of multiple-DOF structures was investigated by Nayfeh and Mook [42], who revealed the double-bending phenomenon of system with quadratic nonlinearity resulting in a broader bandwidth. In recent years, internal resonance has been applied in energy harvesting from preexisting base vibrations [35][36][37][38][39][40][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58]. Erturk et al [40] proposed an L-shaped beam to arouse internal resonance through geometric nonlinearity, but they only focused on the linearized distributed-parameter electro-elastic dynamics.…”

“…In their follow-up work [38], 2:1 internal resonance was applied to an L-shaped piezoelectric energy harvester with frequency tuning magnets, achieving high amplitude response in a large range of excitation frequencies. Some other studies were conducted with similar L-shaped designs [36,45,46]. Yang and Towfighian [47] combined the bistable nonlinearity with 2:1 internal resonance using a movable magnet along the piezoelectric cantilever and obtained a bandwidth two times larger than the pure bistable case.…”

Design, modeling, and experiment of a multi-bifurcated cantilever piezoelectric energy harvester

“…By adjusting the geometrical parameters of the harvester, the first two natural frequencies could be relatively close to achieve the broadband frequency range. Similarly, there are also researches on L-shaped harvesters used for nonlinear vibration energy harvesting (Chen et al, 2016; Liu et al, 2017; Nie et al 2019; Samandari and Cigeroglu, 2016; Wei et al, 2018; Yao et al, 2018). Similarly, Wang et al (2016) also studied the L-shaped harvester which performed high-efficiency energy harvesting under multi-source broadband excitations.…”