This paper investigates the nonlinear dynamic characteristics of a magnetically coupled piezoelectric energy harvester under low frequency excitation where the angle of the external magnetic field is adjustable. The nonlinear dynamic equation with the identified nonlinear magnetic force is derived to describe the electromechanical interaction of variable inclination angle harvesters. The effect of excitation amplitude and frequency on dynamic behavior is proposed by using the phase trajectory, power spectrum, and bifurcation diagram. The numerical analysis shows that a rotating magnetically coupled energy harvesting system exhibits rich nonlinear characteristics with the change of external magnet inclination angle. The nonlinear route to and from large amplitude high-energy motion can be clearly observed. It is demonstrated numerically and experimentally that lumped parameters equations with an identified polynomials for magnetic force could adequately describe the characteristics of nonlinear energy harvester. The rotating magnetically coupled energy harvester possesses the usable frequency bandwidth over a wide range of low frequency excitation by adjusting the angular orientation.
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April 2015
Research-Article
Nonlinear Dynamic Characteristics of Variable Inclination Magnetically Coupled Piezoelectric Energy Harvesters
Junyi Cao,
Junyi Cao
1
State Key Laboratory for Manufacturing Systems
Engineering,
Research Institute of Diagnostics and Cybernetics,
Engineering,
Research Institute of Diagnostics and Cybernetics,
Xi’an Jiaotong University
,Xi’an 710049
, China
;Department of Aerospace Engineering,
Ann Arbor, MI 48109-2140
e-mail: caojy@mail.xjtu.edu.cn
University of Michigan
,Ann Arbor, MI 48109-2140
e-mail: caojy@mail.xjtu.edu.cn
1Corresponding author.
Search for other works by this author on:
Shengxi Zhou,
Shengxi Zhou
State Key Laboratory for Manufacturing Systems
Engineering,
Research Institute of Diagnostics and Cybernetics,
Engineering,
Research Institute of Diagnostics and Cybernetics,
Xi’an Jiaotong University
,Xi’an 710049
, China
Search for other works by this author on:
Daniel J. Inman,
Daniel J. Inman
Department of Aerospace Engineering,
e-mail: daninman@umich.edu
University of Michigan
,Ann Arbor, MI 48109-2140
e-mail: daninman@umich.edu
Search for other works by this author on:
Jing Lin
Jing Lin
State Key Laboratory for Manufacturing Systems
Engineering,
Research Institute of Diagnostics and Cybernetics,
Engineering,
Research Institute of Diagnostics and Cybernetics,
Xi’an Jiaotong University
,Xi’an 710049
, China
Search for other works by this author on:
Junyi Cao
State Key Laboratory for Manufacturing Systems
Engineering,
Research Institute of Diagnostics and Cybernetics,
Engineering,
Research Institute of Diagnostics and Cybernetics,
Xi’an Jiaotong University
,Xi’an 710049
, China
;Department of Aerospace Engineering,
Ann Arbor, MI 48109-2140
e-mail: caojy@mail.xjtu.edu.cn
University of Michigan
,Ann Arbor, MI 48109-2140
e-mail: caojy@mail.xjtu.edu.cn
Shengxi Zhou
State Key Laboratory for Manufacturing Systems
Engineering,
Research Institute of Diagnostics and Cybernetics,
Engineering,
Research Institute of Diagnostics and Cybernetics,
Xi’an Jiaotong University
,Xi’an 710049
, China
Daniel J. Inman
Department of Aerospace Engineering,
e-mail: daninman@umich.edu
University of Michigan
,Ann Arbor, MI 48109-2140
e-mail: daninman@umich.edu
Jing Lin
State Key Laboratory for Manufacturing Systems
Engineering,
Research Institute of Diagnostics and Cybernetics,
Engineering,
Research Institute of Diagnostics and Cybernetics,
Xi’an Jiaotong University
,Xi’an 710049
, China
1Corresponding author.
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received June 3, 2014; final manuscript received November 8, 2014; published online January 20, 2015. Assoc. Editor: Mohammed Daqaq.
J. Vib. Acoust. Apr 2015, 137(2): 021015 (9 pages)
Published Online: April 1, 2015
Article history
Received:
June 3, 2014
Revision Received:
November 8, 2014
Online:
January 20, 2015
Citation
Cao, J., Zhou, S., Inman, D. J., and Lin, J. (April 1, 2015). "Nonlinear Dynamic Characteristics of Variable Inclination Magnetically Coupled Piezoelectric Energy Harvesters." ASME. J. Vib. Acoust. April 2015; 137(2): 021015. https://doi.org/10.1115/1.4029076
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