scholarly journals Shape optimization of the active element for vibration energy harvesting

Mechanika ◽  
2020 ◽  
Vol 26 (4) ◽  
pp. 318-324
Author(s):  
Rimvydas GAIDYS ◽  
Darius ŽIŽYS ◽  
Paulius SKĖRYS ◽  
Audronė LUPEIKIENĖ
Keyword(s):  
Computational Models ◽  
Active Element ◽  
Mechanical Strain ◽  
Relative Displacement ◽  
Mode Shapes ◽  
Vibration Energy ◽  
Normal Strain ◽  
Vibration Energy Harvesting ◽  
Eigen Frequencies ◽  
Piezoelectric Fiber

As the use of renewable energy is increasing exponentially all around the world, the micro energy sources are no different. One of renewable micro energy generator is transducer which can make electricity from the relative displacement present within the system or the mechanical strain. A technique was created to maximize the collection of the electricity generated from a piezoelectric fiber, based on modes of transversal vibration. Created the numerical and computational models of the dynamic element's shape advancement issue. Normal strain top generation was expanded by 49%. The energy rise was 16%. The exploratory stands and strategies were created for the test confirmation of the depicted numerical modeling results. Comes about gotten from the try utilizing the holography method were compared to hypothetically gotten eigen frequencies and mode shapes, and the mistake does not surpass 3%.

Constrained Design Optimization of Vibration Energy Harvesting Devices

2013 ◽  
Vol 136 (2) ◽  
Author(s):  
Mehdi Hendijanizadeh ◽  
Mohamed Moshrefi-Torbati ◽  
Suleiman M. Sharkh
Keyword(s):  
Energy Harvesting ◽  
Low Frequency ◽  
Load Resistance ◽  
Relative Displacement ◽  
Internal Resistance ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Optimum Load ◽  
Seismic Mass ◽  
Low Frequency Vibration

Existing design criteria for vibration energy harvesting systems provide guidance on the appropriate selection of the seismic mass and load resistance. To harvest maximum power in resonant devices, the mass needs to be as large as possible and the load resistance needs to be equal to the sum of the internal resistance of the generator and the mechanical damping equivalent resistance. However, it is shown in this paper that these rules produce suboptimum results for applications where there is a constraint on the relative displacement of the seismic mass, which is often the case. When the displacement is constrained, increasing the mass beyond a certain limit reduces the amount of harvested power. The optimum load resistance in this case is shown to be equal to the generator's internal resistance. These criteria are extended to those devices that harvest energy from a low-frequency vibration by utilizing an interface that transforms the input motion to higher frequencies. For such cases, the optimum load resistance and the corresponding transmission ratio are derived.

Modeling of polyurethane/lead zirconate titanate composites for vibration energy harvesting

2018 ◽  
Vol 53 (5) ◽  
pp. 613-623 ◽  
Author(s):  
Abdelkader Rjafallah ◽  
Abdelowahed Hajjaji ◽  
Daniel Guyomar ◽  
Khalid Kandoussi ◽  
Fouad Belhora ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Lead Zirconate Titanate ◽  
Mechanical Strain ◽  
Model Performance ◽  
Electrical Energy ◽  
Lead Zirconate ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Ultra Low Power ◽  
Zirconate Titanate

Collecting the vibration energy existing in the surrounding environment and its transformation to a useful electrical energy in order to supply ultra-low power systems remains an emerging and promising technology. During the last decades, most of research efforts dealt with energy-harvesting technology using piezoelectric ceramics. However, those materials are stiff and limited in mechanical strain abilities. In addition, they lose their stiffness and piezoelectricity at high levels of mechanical strain. Thus, they are unsuitable for many applications in which low frequency and high strain level are required. However, electrostrictive polymers are lightweight, very flexible, have low manufacturing costs and are easy to mould into any desired shapes. These special properties led to them being considered as potential actuators. However, it is not well known that these materials also can be used for mechanical-to-electrical energy harvesting. In this research paper, electromechanical characterization of polymer/lead zirconate titanate composites was extended. The first part develops the analytical model predicting the energy harvested by polyurethane/PZT composites from electrical and mechanical properties of their constituent materials. Indeed, this model was based on the approach of representing the experimental setup with an equivalent electrical scheme. The second part focuses on the assessment of model performance by comparison between predicted and observed values. As a result, good agreements were observed between the two sets of data; in addition, the model could be used to optimize the choice of constituent materials. The last part concerns the contribution of both the electrostrictive effect and piezoelectric effect in electrical powers harvested by PU/PZT composites.

The benefits of a magnetically coupled asymmetric monostable dual-cantilever energy harvester under random excitation

2019 ◽  
Vol 30 (20) ◽  
pp. 3136-3145 ◽  
Author(s):  
Zhengqiu Xie ◽  
Shengxi Zhou ◽  
Jitao Xiong ◽  
Wenbin Huang
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Energy Harvester ◽  
Mechanical Strain ◽  
Magnetic Coupling ◽  
Random Excitation ◽  
Superior Performance ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Piezoelectric Energy

Piezoelectric vibration energy harvesting is a promising technique to power wireless sensor networks. This article originally presents a magnetically coupled asymmetric monostable dual-cantilever piezoelectric energy harvester consisting of a generating piezoelectric cantilever beam and an auxiliary cantilever beam. Theoretical and experimental results both verify that the asymmetric harvester has the superior performance compared with the conventional magnetically coupled symmetric bistable dual-cantilever piezoelectric energy harvester, yielding higher voltage output under different magnetic coupling intensities and different power densities of the band-limited Gaussian white noise random excitation. More importantly, the mechanical strain of the asymmetric harvester is much smaller than that of the symmetric harvester, being lower than half of the latter one under strong magnetic coupling. Therefore, due to its higher energy conversion efficiency and better durability, the proposed asymmetric harvester is beneficial for practical environment vibration energy harvesting.

scholarly journals Experiment Investigation of Bistable Vibration Energy Harvesting with Random Wave Environment

2021 ◽  
Vol 11 (9) ◽  
pp. 3868
Author(s):  
Qiong Wu ◽  
Hairui Zhang ◽  
Jie Lian ◽  
Wei Zhao ◽  
Shijie Zhou ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Harvesting ◽  
Cantilever Beam ◽  
Large Scale ◽  
Low Frequency ◽  
Vibration Energy ◽  
Random Wave ◽  
Periodic Signal ◽  
Vibration Energy Harvesting ◽  
Motion Activity

The energy harvested from the renewable energy has been attracting a great potential as a source of electricity for many years; however, several challenges still exist limiting output performance, such as the package and low frequency of the wave. Here, this paper proposed a bistable vibration system for harvesting low-frequency renewable energy, the bistable vibration model consisting of an inverted cantilever beam with a mass block at the tip in a random wave environment and also develop a vibration energy harvesting system with a piezoelectric element attached to the surface of a cantilever beam. The experiment was carried out by simulating the random wave environment using the experimental equipment. The experiment result showed a mass block’s response vibration was indeed changed from a single stable vibration to a bistable oscillation when a random wave signal and a periodic signal were co-excited. It was shown that stochastic resonance phenomena can be activated reliably using the proposed bistable motion system, and, correspondingly, large-scale bistable responses can be generated to realize effective amplitude enlargement after input signals are received. Furthermore, as an important design factor, the influence of periodic excitation signals on the large-scale bistable motion activity was carefully discussed, and a solid foundation was laid for further practical energy harvesting applications.

scholarly journals Feasibility study of multi-directional vibration energy harvesting with a frame harvester

2014 ◽  
Author(s):  
Hao Wu ◽  
Lihua Tang ◽  
Yaowen Yang ◽  
Chee Kiong Soh
Keyword(s):  
Energy Harvesting ◽  
Feasibility Study ◽  
Vibration Energy ◽  
Vibration Energy Harvesting

Genetic algorithm- and finite element-based design and analysis of nonprismatic piezolaminated beam for optimal vibration energy harvesting

2015 ◽  
Vol 230 (14) ◽  
pp. 2532-2548 ◽  
Author(s):  
Alok Ranjan Biswal ◽  
Tarapada Roy ◽  
Rabindra Kumar Behera
Keyword(s):  
Genetic Algorithm ◽  
Finite Element ◽  
Energy Harvesting ◽  
Output Power ◽  
Governing Equation ◽  
Optimization Technique ◽  
Vibration Energy ◽  
Fe Model ◽  
Vibration Energy Harvesting ◽  
Real Coded Genetic Algorithm

The current article deals with finite element (FE)- and genetic algorithm (GA)-based vibration energy harvesting from a tapered piezolaminated cantilever beam. Euler–Bernoulli beam theory is used for modeling the various cross sections of the beam. The governing equation of motion is derived by using the Hamilton's principle. Two noded beam elements with two degrees of freedom at each node have been considered in order to solve the governing equation. The effect of structural damping has also been incorporated in the FE model. An electric interface is assumed to be connected to measure the voltage and output power in piezoelectric patch due to charge accumulation caused by vibration. The effects of taper (both in the width and height directions) on output power for three cases of shape variation (such as linear, parabolic and cubic) along with frequency and voltage are analyzed. A real-coded genetic algorithm-based constrained (such as ultimate stress and breakdown voltage) optimization technique has been formulated to determine the best possible design variables for optimal harvesting power. A comparative study is also carried out for output power by varying the cross section of the beam, and genetic algorithm-based optimization scheme shows the better results than that of available conventional trial and error methods.

scholarly journals Time-varying output performances of piezoelectric vibration energy harvesting under nonstationary random vibrations

2017 ◽  
Vol 27 (1) ◽  
pp. 015004 ◽  
Author(s):  
Heonjun Yoon ◽  
Miso Kim ◽  
Choon-Su Park ◽  
Byeng D Youn
Keyword(s):  
Energy Harvesting ◽  
Vibration Energy ◽  
Time Varying ◽  
Random Vibrations ◽  
Vibration Energy Harvesting ◽  
Piezoelectric Vibration

scholarly journals Response Identification in a Vibration Energy-Harvesting System with Quasi-Zero Stiffness and Two Potential Wells

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3926
Author(s):  
Joanna Iwaniec ◽  
Grzegorz Litak ◽  
Marek Iwaniec ◽  
Jerzy Margielewicz ◽  
Damian Gąska ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Recurrence Plot ◽  
Piezoelectric Transducers ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Potential Wells ◽  
Frequency Responses ◽  
Voltage Output ◽  
Quantification Analysis ◽  
Energy Harvesting System

In this paper, the frequency broadband effect in vibration energy harvesting was studied numerically using a quasi-zero stiffness resonator with two potential wells and piezoelectric transducers. Corresponding solutions were investigated for system excitation harmonics at various frequencies. Solutions for the higher voltage output were collected in specific branches of the power output diagram. Both the resonant solution synchronized with excitation and the frequency responses of the subharmonic spectra were found. The selected cases were illustrated and classified using a phase portrait, a Poincaré section, and recurrence plot (RP) approaches. Select recurrence quantification analysis (RQA) measures were used to characterize the discussed solutions.

Frequency Self-tuning Scheme for Broadband Vibration Energy Harvesting

2010 ◽  
Vol 21 (9) ◽  
pp. 897-906 ◽  
Author(s):  
Mickaël Lallart ◽  
Steven R. Anton ◽  
Daniel J. Inman
Keyword(s):  
Energy Harvesting ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Self Tuning ◽  
Tuning Scheme
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