Nonlinear vibration energy harvester: Design and oscillating stability analyses

Rubes, Ondrej; Brablc, Martin; Hadaš, Zdeněk

doi:10.1016/j.ymssp.2018.07.016

Cited by 25 publications

(20 citation statements)

References 35 publications

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“…This model of a novel multilayer structure with crack protective layers can be used to design an extended model of a bistable vibration energy harvester with additional magnets. A similar 1DOF model was explained and experimentally verified in publication [ 36 ].…”

Section: 1dof Model Of Multilayer Piezoelectric Harvestermentioning

confidence: 96%

Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration

Rubes

Machů

Ševeček

et al. 2020

Sensors

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Kinetic piezoelectric energy harvesters are used to power up ultra-low power devices without batteries as an alternative and eco-friendly source of energy. This paper deals with a novel design of a lead-free multilayer energy harvester based on BaTiO3 ceramics. This material is very brittle and might be cracked in small amplitudes of oscillations. However, the main aim of our development is the design of a crack protective layered architecture that protects an energy harvesting device in very high amplitudes of oscillations. This architecture is described and optimized for chosen geometry and the resulted one degree of freedom coupled electromechanical model is derived. This model could be used in bistable configuration and the model is extended about the nonlinear stiffness produced by auxiliary magnets. The complex bistable vibration energy harvester is simulated to predict operation in a wide range of frequency excitation. It should demonstrate typical operation of designed beam and a stress intensity factor was calculated for layers. The whole system, without presence of cracks, was simulated with an excitation acceleration of amplitude up to 1g. The maximal obtained power was around 2 mW at the frequency around 40 Hz with a maximal tip displacement 7.5 mm. The maximal operating amplitude of this novel design was calculated around 10 mm which is 10-times higher than without protective layers.

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Section: 1dof Model Of Multilayer Piezoelectric Harvestermentioning

confidence: 96%

Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration

Rubes

Machů

Ševeček

et al. 2020

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…Table 3 contains mechanical properties of considered materials. A mechanical damping ratio b r = 0.01 is considered for the whole structure. The damping ratio for a linear resonator is inversely proportional to the quality factor which is evaluated separately for each piezoelectric resonator by measurements (Rubes et al, 2019) (although, in reality, the value of damping ratio is a function of structure's natural frequencies and also depends on a mechanical design and materials used, it cannot be accurately estimated but the chosen value of b r is used from a similar design of piezoelectric harvester). The harvested power significantly depends on the value of b r (Hadas et al, 2010).…”

Section: Searching For An Optimal Design Of the Energy Harvestermentioning

confidence: 99%

Modeling of electromechanical response and fracture resistance of multilayer piezoelectric energy harvester with residual stresses

Machů

Ševeček

Hadaš

et al. 2020

Journal of Intelligent Material Systems and Structures

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The article focuses on a modeling and subsequent optimization of a novel layered architecture of the vibration piezoceramic energy harvester composed of ZrO2/Al2O3/BaTiO3 layers and containing thermal residual stresses. The developed analytical/numerical model allows to determine the complete electromechanical response and the apparent fracture toughness of the multilayer vibration energy harvester, upon consideration of thermal residual stresses and time-harmonic kinematic excitation. The derived model uses the Euler–Bernoulli beam theory, Hamilton’s variational principle, and a classical laminate theory to determine the first natural frequency, steady-state electromechanical response of the beam upon harmonic vibrations, and also the mechanical stresses within particular layers of the harvester. The laminate apparent fracture toughness is computed by means of the weight function approach. A crucial point is the further optimization of the layered architecture from both the electromechanical response and the fracture resistance point of view. Maximal allowable excitation acceleration of the harvester upon which the piezoelectric layer will not fail is determined. It makes possible to better use the harvester’s capabilities in a given application and simultaneously guarantee its safe operation. Outputs of the derived analytical model were validated with finite element method simulations and available experimental results, and a good agreement between all approaches was obtained.

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“…Experiments showed that the effective bandwidth of the energy harvester under magnetic coupling was 3.1 times the bandwidth without magnetic force. Rubes et al [ 9 ] conducted research on magnetically coupled bistable piezoelectric energy harvesters, and their research showed that the introduction of nonlinear stiffness can greatly improve the energy harvesting performance of piezoelectric energy harvesters; Erturk and Inman [ 10 ] experimentally proved that the nonlinearity of magnetic coupling can cause vibration between the bistable high-energy traps, thereby improving the collection performance of the energy harvester; and Stanton et al [ 11 ] established a complete dynamic model for the output voltage and dynamic behavior of the magnetic coupling bistable piezoelectric energy harvester and proved the availability of the bistable harvester. Under the condition of simple harmonic excitation, Li et al [ 12 ] developed a magnetic-coupled bi-stable flutter-based energy harvester and proved that the proposed system was an effective design approach for enhancing energy harvesting capability in a low air speed range.…”

Section: Introductionmentioning

confidence: 99%

A Curve-Shaped Beam Bistable Piezoelectric Energy Harvester with Variable Potential Well: Modeling and Numerical Simulation

et al. 2021

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To improve the energy harvesting performance of an energy harvester, a novel bistable piezoelectric energy harvester with variable potential well (BPEH-V) is proposed by introducing a spring to the external magnet from a curve-shaped beam bistable harvester (CBH-C). First, finite element simulation was performed in COMSOL software to validate that the curved beam configuration was superior to the straight beam in power generation performance, which benefits energy harvesting. Moreover, the nonlinear magnetic model was obtained by using the magnetic dipoles method, and the nonlinear restoring force model of the curve-shaped beam was acquired based on fitting the experimental data. The corresponding coupled governing equations were derived by using generalized Hamilton’s principle, the dynamic responses were obtained by solving the coupling equations with the ode45 method. Finally, the numerical simulations showed that the proposed harvester can make interwell oscillations easier due to the spring being efficiently introduced to pull down the potential barrier compared with the conventional bistable harvester. Spring stiffness has a great impact on characteristics of the system, and a suitable stiffness contributes to realize large-amplitude interwell oscillations over a wide range of excitation, especially in the low excitation condition.

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Nonlinear vibration energy harvester: Design and oscillating stability analyses

Cited by 25 publications

References 35 publications

Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration

Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration

Modeling of electromechanical response and fracture resistance of multilayer piezoelectric energy harvester with residual stresses

A Curve-Shaped Beam Bistable Piezoelectric Energy Harvester with Variable Potential Well: Modeling and Numerical Simulation

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