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<p>In this paper, we present the design and experimental tests of an innovative T-shaped piezoelectric beam harvester featuring a stopper to realize broadband harvesting performance. The proposed harvester consists of a T-shaped cantilever beam with one-pair stoppers to limit the beam motions. Firstly, the geometric parameters of a superior linear structure are determined by means of finite element simulation. Subsequently, the responses of the T-shaped cantilever beam with stoppers are tested. Experimental results demonstrate that the introduction of the stopper results in a hardening nonlinearity. Meanwhile, it broadens the operating bandwidth from 2.81Hz to 4.69Hz, which increased by 67% compared with no stopper. Moreover, extensive parametric analyses are implemented to investigate the effects of the gap distance of the stopper, the longitudinal position of the stopper, and resistive loads. A maximum power output of 83.5 <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mu \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>μ</mi> </math></EquationSource> </InlineEquation>W is obtained.</p>

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Experimental study of a T-shaped piezoelectric beam with stoppers for broadband energy harvesting

  • 期刊论文

  • 发表日期：

    2025年11月4日

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  • Le Yang,
  • Xiaofang Zhang,
  • Wenan Jiang,
  • Qinsheng Bi

摘要

In this paper, we present the design and experimental tests of an innovative T-shaped piezoelectric beam harvester featuring a stopper to realize broadband harvesting performance. The proposed harvester consists of a T-shaped cantilever beam with one-pair stoppers to limit the beam motions. Firstly, the geometric parameters of a superior linear structure are determined by means of finite element simulation. Subsequently, the responses of the T-shaped cantilever beam with stoppers are tested. Experimental results demonstrate that the introduction of the stopper results in a hardening nonlinearity. Meanwhile, it broadens the operating bandwidth from 2.81Hz to 4.69Hz, which increased by 67% compared with no stopper. Moreover, extensive parametric analyses are implemented to investigate the effects of the gap distance of the stopper, the longitudinal position of the stopper, and resistive loads. A maximum power output of 83.5 \(\mu \) μ W is obtained.