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Article Dans Une Revue Journal of Vibration and Acoustics Année : 2017

Two methods to broaden bandwidth of a nonlinear piezoelectric bimorph power harvester

Résumé

We propose two methods to broaden the operation bandwidth of a nonlinear pinned-pinned piezoelectric bimorph power harvester. The energy-scavenging structure consists of a properly poled and electroded flexible bimorph with a metallic layer in the middle, and is subjected to flexural vibration. Nonlinear effects at large deformations near resonance are considered by taking the in-plane extension of the bimorph into account. The resulting output powers are multi-valued and exhibit jump phenomena. Two methods to broaden the operation bandwidth are proposed: The first method is to extend the operation frequency to the left single-valued region through optimal design. The second method is to excite optimal initial conditions with a voltage source. Larger output powers in the multi-valued region of the nonlinear harvester are obtained. Hence the operation bandwidth is broadened from the left single-valued region to the whole multi-valued region.
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Dates et versions

hal-02131438 , version 1 (16-05-2019)

Identifiants

  • HAL Id : hal-02131438 , version 1

Citer

Hongping Hu, Longxiang Dai, Hao Chen, Shan Jiang, Hairen Wang, et al.. Two methods to broaden bandwidth of a nonlinear piezoelectric bimorph power harvester. Journal of Vibration and Acoustics, 2017, 139 (3), pp.031008. ⟨hal-02131438⟩
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