Piezoelectric cantilever-pendulum for multi-directional energy harvesting with internal resonance

J. Xu; J. Tang

doi:10.1117/12.2084427

2 April 2015 Piezoelectric cantilever-pendulum for multi-directional energy harvesting with internal resonance

J. Xu, J. Tang

Proceedings Volume 9431, Active and Passive Smart Structures and Integrated Systems 2015; 94310M (2015) https://doi.org/10.1117/12.2084427
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

Piezoelectric transducers are widely employed in vibration-based energy harvesting schemes. Simple piezoelectric cantilever for energy harvesting is uni-directional and has bandwidth limitation. In this research we explore utilizing internal resonances to harvest vibratory energy due to excitations from an arbitrary direction with the usage of a single piezoelectric cantilever. Specifically, it is identified that by attaching a pendulum to the piezoelectric cantilever, 1:2 internal resonances can be induced based on the nonlinear coupling. The nonlinear effect induces modal energy exchange between beam bending motion and pendulum motions in 3-dimensional space, which ultimately yield multidirectional energy harvesting by a single cantilever. Systematic analysis and experimental investigation are carried out to demonstrate this new concept.

Citation Download Citation

J. Xu and J. Tang "Piezoelectric cantilever-pendulum for multi-directional energy harvesting with internal resonance", Proc. SPIE 9431, Active and Passive Smart Structures and Integrated Systems 2015, 94310M (2 April 2015); https://doi.org/10.1117/12.2084427

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