Journal
ACTA MECHANICA SINICA
Volume 36, Issue 3, Pages 618-623Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10409-020-00945-4
Keywords
Energy harvesting; Internal resonance; Broadband; Nonlinear modal interactions
Categories
Funding
- National Natural Science Foundation of China [11632008, 11702119, 11972173]
- Natural Science Foundation of Jiangsu Province [BK20170565]
- Qing Lan Project of Jiangsu Province
- Training program for Young Talents of Jiangsu University
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This paper proposes a two-to-one internal resonance to widen the bandwidth of vibratory energy harvesters. To describe the improved characteristic, an electromagnetic spring-pendulum harvester is designed. Approximate analytical solutions of the electromechanical coupled system are carried out by introducing the method of multiple scales, and the frequency response relationships of the displacement and the current are obtained. The character of broadband harvesting performance is examined, the two peaks and double jump phenomena for variation of design parameters were observed. The effect of key control parameters on the harvesters bandwidth is considered, and the nonlinear behaviors of the harvester are validated via numerical results.
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