Non-resonant energy harvesting via an adaptive bistable potential

作者：Hosseinloo Ashkan Haji^*; Turitsyn Konstantin

来源：Smart Materials and Structures, 2016, 25(1): 015010.

DOI：10.1088/0964-1726/25/1/015010

• energy harvesting
• bistable potential
• adaptive
• buy-low-sell-high strategy
• piezo-electric
• non-resonant

Narrow bandwidth and easy detuning, inefficiency in broadband and non-stationary excitations, and difficulties in matching a linear harvester's resonance frequency to low-frequency excitations at small scales, have convinced researchers to investigate nonlinear, and in particular bistable, energy harvesters in recent years. However, bistable harvesters suffer from co-existing low and high energy orbits, and sensitivity to initial conditions, and have recently been proven inefficient when subjected to many real-world random and non-stationary excitations. Here, we propose a novel non-resonant buy-low-sell-high strategy that can significantly improve the harvester's effectiveness at low frequencies in a much more robust fashion. This strategy could be realized by a passive adaptive bistable system. Simulation results confirm the high effectiveness of the adaptive bistable system following a buy-low-sell-high logic when subjected to harmonic and random non-stationary walking excitations compared to its conventional bistable and linear counterparts.

• 出版日期2016-1