Multi-frequency responses of compliant orthoplanar spring designs for widening the bandwidth of piezoelectric energy harvesters

Dhote, Sharvari; Li, Haitao; Yang, Zhengbao

doi:10.1016/j.ijmecsci.2019.04.029

Cited by 25 publications

(18 citation statements)

References 27 publications

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“…A comparison between three nonlinear planar springs, namely bi-leg, quad-leg, and pent-leg designs, is presented in [14] to examine the influence of the interaction of a vibration mode to extend the operating frequency range of the PEH. In [15], the authors answered the question: How can the electricity be generated from a mechanical structure driven by vapor momentum?…”

Section: Introductionmentioning

confidence: 99%

Influence of the Motion of a Spring Pendulum on Energy-Harvesting Devices

et al. 2021

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Energy harvesting is becoming more and more essential in the mechanical vibration application of many devices. Appropriate devices can convert the vibrations into electrical energy, which can be used as a power supply instead of ordinary ones. This study investigated a dynamical system that correlates with two devices, namely a piezoelectric device and an electromagnetic one, to produce two novel models. These devices are connected to a nonlinear damping spring pendulum with two degrees of freedom. The damping spring pendulum is supported by a point moving in a circular orbit. Lagrange’s equations of the second kind were utilized to obtain the equations of motion. The asymptotic solutions of these equations were acquired up to the third approximation using the approach of multiple scales. The comparison between the approximate and the numerical solutions reveals high consistency between them. The steady-state solutions were investigated, and their stabilities were checked. The influences of excitation amplitudes, damping coefficients, and the different frequencies on energy-harvesting device outputs are examined and discussed. Finally, the nonlinear stability analysis of the modulation equations is discussed through the stability and instability ranges of the frequency response curves. The work is significant due to its real-life applications, such as a power supply of sensors, charging electronic devices, and medical applications.

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Section: Introductionmentioning

confidence: 99%

Influence of the Motion of a Spring Pendulum on Energy-Harvesting Devices

et al. 2021

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“…Based on these analyses, energy harvesting devices are becoming more complex, being related to multimodal structures in order to increase system performance (Dhote et al, 2015, 2019; Nabavi and Zhang, 2019; Upadrashta and Yang, 2018). For this reason, typical procedures based on analytical formulas, taken from the Euler-Bernoulli beam theory, are not accurately effective to describe the behavior of these devices.…”

Section: Introductionmentioning

confidence: 99%

Multimodal pizza-shaped piezoelectric vibration-based energy harvesters

CAETANO

Savi

2021

Journal of Intelligent Material Systems and Structures

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Energy harvesting from ambient vibration through piezoelectric devices has received a lot of attention in recent years from both academia and industry. One of the main challenges is to develop devices capable of adapting to diverse sources of environmental excitation, being able to efficiently operate over a broadband frequency spectrum. This work proposes a novel multimodal design of a piezoelectric energy harvesting system to harness energy from a wideband ambient vibration source. Circular-shaped and pizza-shaped designs are employed as candidates for the device, comparing their performance with classical beam-shaped devices. Finite element analysis is employed to model system dynamics using ANSYS Workbench. An optimization procedure is applied to the system aiming to seek a configuration that can extract energy from a broader frequency spectrum and maximize its output power. A comparative analysis with conventional energy harvesting systems is performed. Numerical simulations are carried out to investigate the harvester performances under harmonic and random excitations. Results show that the proposed multimodal harvester has potential to harness energy from broadband ambient vibration sources presenting performance advantages in comparison to conventional single-mode energy harvesters.

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“…In general, the environmental vibration sources are random and cover a certain range, the working frequency of the vibration generators need to be broadened to achieve high output performance. To increase the output power and broaden the operating bandwidth of the vibration generators, various approaches, such as oscillator arrays [ 27 ], multi-modal oscillators [ 28 , 29 ], and active or passive frequency tuning technologies [ 30 ] have been proposed. In addition, researchers have exploited numerous approaches to introduce nonlinearity into vibration generators, including monostable Duffing oscillators [ 31 , 32 ], bistable oscillators [ 33 , 34 , 35 ], and frequency-up-conversion technologies [ 36 , 37 ] etc.…”

Section: Introductionmentioning

confidence: 99%

A Magnetic-Coupled Nonlinear Electromagnetic Generator with Both Wideband and High-Power Performance

Huang

Feng

et al. 2021

Micromachines

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This paper proposed a high-performance magnetic-coupled nonlinear electromagnetic generator (MNL-EMG). A high-permeability iron core is incorporated to the coil. The strong coupling between the iron core and the vibrating magnets lead to significantly improved output power and a broadened operating bandwidth. The magnetic force of the iron core to the permanent magnets and the magnetic flux density inside the iron core are simulated, and the dimension parameters of the MNL-EMG are optimized. Under acceleration of 1.5 g, the MNL-EMG can maintain high output performance in a wide frequency range of 17~30 Hz, which is 4.3 times wider than that of linear electromagnetic generator (EMG) without an iron core. The maximum output power of MNL-EMG reaches 174 mW under the optimal load of 35 Ω, which is higher than those of most vibration generators with frequency less than 30 Hz. The maximum 360 parallel-connected LEDs were successfully lit by the prototype. Moreover, the prototype has an excellent charging performance such that a 1.2 V, 900 mAh Ni-MH battery was charged from 0.95 V to 0.98 V in 240 s. Both the simulation and experiments verify that the proposed bistable EMG device based on magnetic coupling has advantages of wide operating bandwidth and high output power, which could be sufficient to power micro electronic devices.

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Multi-frequency responses of compliant orthoplanar spring designs for widening the bandwidth of piezoelectric energy harvesters

Cited by 25 publications

References 27 publications

Influence of the Motion of a Spring Pendulum on Energy-Harvesting Devices

Influence of the Motion of a Spring Pendulum on Energy-Harvesting Devices

Multimodal pizza-shaped piezoelectric vibration-based energy harvesters

A Magnetic-Coupled Nonlinear Electromagnetic Generator with Both Wideband and High-Power Performance

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