Fundamental Limits to Nonlinear Energy Harvesting
Author(s)
Haji Hosseinloo, Ashkan; Turitsyn, Konstantin
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Linear and nonlinear vibration energy harvesting has been the focus of considerable research in recent years. However, fundamental limits on the harvestable energy of a harvester subjected to an arbitrary excitation force and different constraints is not yet fully understood. Understanding these limits is not only essential for an assessment of the technology potential, but it also provides a broader perspective on the current harvesting mechanisms and guidance in their improvement. Here, we derive the fundamental limits on the output power of an ideal energy harvester for arbitrary excitation waveforms and build on the current analysis framework for the simple computation of this limit for more sophisticated setups. We show that the optimal harvester maximizes the harvested energy through a mechanical analog of a buy-low-sell-high strategy. We also propose a nonresonant passive latch-assisted harvester to realize this strategy for an effective harvesting. It is shown that the proposed harvester harvests energy more effectively than its linear and bistable counterparts over a wider range of excitation frequencies and amplitudes. The buy-low-sell-high strategy also reveals why the conventional bistable harvester works well at low-frequency excitation.
Date issued
2015-12Department
Massachusetts Institute of Technology. Department of Mechanical EngineeringJournal
Physical Review Applied
Publisher
American Physical Society
Citation
Haji Hosseinloo, Ashkan, and Konstantin Turitsyn. “Fundamental Limits to Nonlinear Energy Harvesting.” Physical Review Applied 4, no. 6 (December 29, 2015). © 2015 American Physical Society
Version: Final published version
ISSN
2331-7019