TY - GEN
T1 - Modelling of broadband piezoelectric energy harvesters
AU - Zhou, Shengxi
AU - Cao, Junyi
AU - Lin, Jing
AU - Ma, Chengbin
PY - 2012
Y1 - 2012
N2 - A nonlinear magnetic coupling model for piezoelectric energy harvesting systems is proposed in this paper. For the purpose of enhancing harvesting efficiency from wide-spectrum vibrations, a magnetic coupling structure of piezoelectric cantilevers is presented. However, the nonlinear dynamic of broadband piezoelectric energy harvesters could not be adequately described due to complex nonlinear magnetic force. Furthermore, the broken frequency can not be predicted using the designed dimensionless model. In order to solve those issues, the nonlinear magnetic force is established using polynomial equation. Based on Hamilton principle and finite element theory, a nonlinear model of the standard piezoelectric cantilever with magnetic coupling is established. Frequency sweeping experiments with various excitation are carried out. The results show that the output characteristic of the proposed model is approximate to that of experimental system under the same condition, and also their broken frequency is very close.
AB - A nonlinear magnetic coupling model for piezoelectric energy harvesting systems is proposed in this paper. For the purpose of enhancing harvesting efficiency from wide-spectrum vibrations, a magnetic coupling structure of piezoelectric cantilevers is presented. However, the nonlinear dynamic of broadband piezoelectric energy harvesters could not be adequately described due to complex nonlinear magnetic force. Furthermore, the broken frequency can not be predicted using the designed dimensionless model. In order to solve those issues, the nonlinear magnetic force is established using polynomial equation. Based on Hamilton principle and finite element theory, a nonlinear model of the standard piezoelectric cantilever with magnetic coupling is established. Frequency sweeping experiments with various excitation are carried out. The results show that the output characteristic of the proposed model is approximate to that of experimental system under the same condition, and also their broken frequency is very close.
UR - http://www.scopus.com/inward/record.url?scp=84892637598&partnerID=8YFLogxK
U2 - 10.1115/SMASIS2012-7956
DO - 10.1115/SMASIS2012-7956
M3 - 会议稿件
AN - SCOPUS:84892637598
SN - 9780791845103
T3 - ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2012
SP - 747
EP - 752
BT - ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2012
T2 - ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2012
Y2 - 19 September 2012 through 21 September 2012
ER -