期刊
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
卷 28, 期 3, 页码 323-338出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X16642302
关键词
piezoelectric energy harvesting; multi-directional energy harvesting; 1:2 internal resonance; energy interchange; dynamic magnifier
资金
- NSF [CMMI-1130724]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1130724] Funding Source: National Science Foundation
Piezoelectric cantilevers are widely used in vibration energy harvesting. Simple cantilever-based harvesters are mostly unidirectional. In this article, we develop a cantilever-pendulum system that can harvest vibratory energy of excitations from an arbitrary direction. The new design consists of a traditional piezoelectric cantilever with a pendulum attached to the tip. It is shown analytically and experimentally that with proper parametric combination this system can induce modal energy interchange between beam vibration and pendulum motions due to 1:2 internal resonance, which ultimately yields multi-directional energy harvesting by a single cantilever. The underlying mechanisms of this design are analyzed in detail.
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