An experimental validation of a new shape optimization technique for piezoelectric harvesting cantilever beams

Mohamed, Khaled T.; Elgamal, Hassan; Kouritem, Sallam A.

doi:10.1016/j.aej.2020.11.024

Cited by 45 publications

(14 citation statements)

References 30 publications

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“…Due to the limitations of the test equipment, the modal test may not be able to obtain all modal results. Therefore, in order to better compare with the modal test results and considering the higher power that can be obtained from the first mode [ 37 ], 11 modes are investigated in Table 4 .…”

Section: Fem Simulation Analysismentioning

confidence: 99%

Design and Optimization of High-Power and Low-Frequency Broadband Transducer with Giant Magnetostrictive Material

Yang

Wang

Zhao

et al. 2022

Sensors

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The applications of sensors in the aerospace industry are mostly concentrated in the middle and high frequencies, and low-frequency sensors often face the problems of low power and short working bandwidth. A lightweight, thin, high-power, low-frequency broadband transducer based on giant magnetostrictive material is designed. The design and optimization processes of the core components are introduced and analyzed emphatically. The finite element simulation results are validated by the PSV-100 laser vibration meter. Three basic configurations of the work panel are proposed, and the optimal configuration is determined by modal, acoustic, and vibration coupling analyses. Compared with the original configuration, it is found that the lowest resonant frequency of the optimal configuration is reduced by 24.6% and the highest resonant frequency within 2000 Hz is 1744.9 Hz, which is 54.2% higher than that of the original configuration. This greatly improves the vibration power and operating frequency range of the transducer. Then, the honeycomb structure is innovatively applied to the work panel, and it is verified that the honeycomb structure has a great effect on the vibration performance of the work panel. By optimizing the size of the honeycomb structure, it is determined that the honeycomb structure can improve the vibration power of the work panel to its maximum value when the distance between the half-opposite sides of the hexagon is H = 3.5 mm. It can reduce the resonant frequency of the work panel; the lowest resonant frequency is reduced by 12.8%. At the same time, the application of a honeycomb panel structure can reduce the weight of the transducer.

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Section: Fem Simulation Analysismentioning

confidence: 99%

Design and Optimization of High-Power and Low-Frequency Broadband Transducer with Giant Magnetostrictive Material

Yang

Wang

Zhao

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…The commonly used approaches for harvesting ambient vibration energy include triboelectric, electromagnetic, electrostatic [ 3 ], and piezoelectric energy harvesting. The merits of simple structure, large power density, and simple operation mechanisms make piezoelectric energy harvesters (PEHs) widely employed in the ocean [ 4 ], pavement [ 5 , 6 , 7 ], and vibration energy harvesting [ 8 , 9 , 10 ]. Research into transducer materials has laid the foundations for the emergence of PEHs [ 11 ] The principle of the piezoelectric energy harvesting technology [ 12 ] has been studied for many years [ 13 , 14 ], and a certain research outcome has been achieved [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Bird-Shape Broadband Piezoelectric Energy Harvester for Low Frequency Vibrations

et al. 2023

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This work presents a novel bird-shaped broadband piezoelectric energy harvester based on a two-DOF crossed beam for low-frequency environmental vibrations. The harvester features a cantilever mounted on a double-hinged beam, whose rotating motions effectively diminish its natural frequencies. Numerical simulation based on the finite element method is conducted to analyze the modal shapes and the harmonic response of the proposed harvester. Prototypes are fabricated and experiments are carried out by a testing system, whose results indicate a good agreement with the simulation. The multi-frequency energy harvesting is achieved at the first-, second-, and fifth-order resonances. In particular, the proposed harvester demonstrates the remarkable output characteristics of 9.53 mW and 1.83 mW at frequencies as low as 19.23 HZ and 45.38 Hz, which are superior to the majority of existing energy harvesters. Besides, the influences of key parameters on the harvesting performance are experimentally investigated to optimize the environmental adaptability of the harvester. This work provides a new perspective for efficiently harvesting the low-frequency vibration energy, which can be utilized for supplying power to electronic devices.

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“…Iannacci (Iannacci 2017) presented a review of the area of energy harvesting-Microelectromechanical Systems (MEMS), with a specific concentration on vibration energy harvesting, especially, the piezoelectric harvester that is utilized in vibration energy sources. Mohamed et al (Mohamed et al 2021) utilized the COMSOL optimization module (BOBYQA solver) and the genetic algorithm to optimize the shape of the energy-harvesting piezoelectric cantilever to maximize the output power. Kouritem et al (Kouritem et al 2022) introduced a broadband technique using the tuning of passive masses on an array of the piezoelectric energy harvester.…”

Section: Introductionmentioning

confidence: 99%

Effect of major factors on broadband natural frequency energy harvesting for rectangular and L- shaped cantilever harvesters

2023

Self Cite

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A small amount of natural frequency deviation extremely decreases the output power. So, a multi-mass single harvester (bending harvester) was utilized to enlarge the bandwidth of the natural frequency. We constructed three models to study the effect of increasing the concentrated masses on increasing the bandwidth natural frequency. We used Finite Element Metho (FEM (COMSOL to model and simulate the three models. Moreover, we constructed an L-shaped harvester with concentrated masses to compare the rectangular harvester with concentrated masses. The results prove that increasing the number of concentrated masses increases the output power and broadband natural frequency. Moreover, the results indicate that the harvester cantilever with concentrated masses gives more output power and broadband than the L- shaped harvester for the same volume. Also, our research studied the harvester parameter effects on the output power. This study found that the increase in beam length and mass height increases the output power while the increase in piezoelectric thickness and damping ratio decreases the output power and bandwidth frequency. We validated our proposed model through a comparison with others’ preceding experimental results and it showed a good agreement. The harvester with a high width/length ratio gives a larger wideband natural frequency.

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An experimental validation of a new shape optimization technique for piezoelectric harvesting cantilever beams

Cited by 45 publications

References 30 publications

Design and Optimization of High-Power and Low-Frequency Broadband Transducer with Giant Magnetostrictive Material

Design and Optimization of High-Power and Low-Frequency Broadband Transducer with Giant Magnetostrictive Material

A Novel Bird-Shape Broadband Piezoelectric Energy Harvester for Low Frequency Vibrations

Effect of major factors on broadband natural frequency energy harvesting for rectangular and L- shaped cantilever harvesters

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