Damping as a result of piezoelectric energy harvesting

Lesieutre, George A.; Ottman, Geffrey; Hofmann, Heath

doi:10.1016/s0022-460x(03)00210-4

Cited by 256 publications

(173 citation statements)

References 11 publications

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“…It is shown that the maximum conversion efficiency corresponds to the maximum induced electric damping as well as the optimal power transfer in the case of weak electromechanical coupling. This result is consistent with that observed by Lesieutre et al [37].…”

Section: Resultssupporting

confidence: 94%

“…Note that our theoretical prediction on the behaviour of displacement against frequency ratio for various electric loads, as illustrated in figure 4(b), qualitatively agrees well with the experimental results observed by Lesieutre et al (see figure 6 in [37]). …”

Section: Weak Electromechanical Couplingsupporting

confidence: 91%

“…Lesieutre et al [37] have studied the induced electric damping associated with a piezoelectric energy harvesting system and derived an expression for the maximum loss factor. It is (loss factor) max e = k 2 sys π , (Lesieutre et al [37]) (26) for small values of k 2 sys which is defined by…”

Section: Conversion Efficiency and Electrically Induced Dampingmentioning

confidence: 99%

“…It is (loss factor) max e = k 2 sys π , (Lesieutre et al [37]) (26) for small values of k 2 sys which is defined by…”

Section: Conversion Efficiency and Electrically Induced Dampingmentioning

confidence: 99%

“…Note that Lesieutre et al [37] have derived an expression of the maximum loss factor by assuming that it occurs at the condition of the optimal power transfer. Their argument is in generally true for most common cases except the situation where the ratio k 2 e ζm is large.…”

Section: Y C Shu and I C Lienmentioning

confidence: 99%

See 4 more Smart Citations

Efficiency of energy conversion for a piezoelectric power harvesting system

Shu

Lien

2006

J. Micromech. Microeng.

275

196

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This paper studies the energy conversion efficiency for a rectified piezoelectric power harvester. An analytical model is proposed, and an expression of efficiency is derived under steady-state operation. In addition, the relationship among the conversion efficiency, electrically induced damping and ac-dc power output is established explicitly. It is shown that the optimization criteria are different depending on the relative strength of the coupling. For the weak electromechanical coupling system, the optimal power transfer is attained when the efficiency and induced damping achieve their maximum values. This result is consistent with that observed in the recent literature. However, a new finding shows that they are not simultaneously maximized in the strongly coupled electromechanical system.

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Section: Resultssupporting

confidence: 94%

Section: Weak Electromechanical Couplingsupporting

confidence: 91%

Section: Conversion Efficiency and Electrically Induced Dampingmentioning

confidence: 99%

“…It is (loss factor) max e = k 2 sys π , (Lesieutre et al [37]) (26) for small values of k 2 sys which is defined by…”

Section: Conversion Efficiency and Electrically Induced Dampingmentioning

confidence: 99%

Section: Y C Shu and I C Lienmentioning

confidence: 99%

See 3 more Smart Citations

Efficiency of energy conversion for a piezoelectric power harvesting system

Shu

Lien

2006

J. Micromech. Microeng.

275

196

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Damping in Structural Dynamics

Lesieutre

2010

Encyclopedia of Aerospace Engineering

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Damping is an important aspect of aerospace structural dynamics. Passive damping is caused by numerous physical mechanisms, only some of which can be exploited by design. The most effective methods of designing materials‐based passive damping into structures involve the use of: high damping viscoelastic polymers in layered damping treatments; elastomers; shunted piezoelectrics; and damped composites. To consider damping during the design process, accurate models are needed—these must capture the general effects of damping, while also enabling the detailed design of damping treatments. Strain‐based viscous damping models yield modal damping that increases monotonically with frequency, a result inconsistent with observations. More general proportional damping is best regarded as a mathematical curiosity. Complex stiffness models, although capable of accommodating frequency‐dependent damping and stiffness in frequency response analysis, cannot directly predict structural response to arbitrary loading. The combination of either the complex stiffness or the modal strain energy method with a modal damping model, however, often yields acceptable results. The need for better accuracy in some applications has motivated the development of improved time‐domain models that capture the frequency‐, temperature‐, and amplitude dependence of damping and stiffness exhibited by the high‐loss materials that are frequently used to effect significant damping.

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Bibliography

2013

Structural Dynamic Analysis With Generalized Damping Models

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Damping as a result of piezoelectric energy harvesting

Cited by 256 publications

References 11 publications

Efficiency of energy conversion for a piezoelectric power harvesting system

Efficiency of energy conversion for a piezoelectric power harvesting system

Damping in Structural Dynamics

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