Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4795296
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- U.S. Department of Commerce, National Institute of Standards and Technology, Technology Innovation Program [70NANB9H9007]
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Numerical and experimental investigations of broadband random vibrational energy harvesting using monostable and bistable piezoelectric cantilevers are presented along with relative performance comparisons. Simulations and experiments reveal that a linear-monostable energy harvester can outperform its bistable counterpart for very low and relatively high random excitation levels. The bistable configuration generates more power for a limited excitation intensity range slightly above the threshold of interwell oscillations. Under broadband stochastic excitation, a bistable energy harvester can potentially be preferred only if it is designed to operate at a known excitation intensity, otherwise using a monostable harvester can be more robust and practical. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4795296]
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