scholarly journals Dynamics analysis of multi-field coupled piezoelectric energy harvester under random excitation

2019 ◽  
Vol 531 ◽  
pp. 012038 ◽  
Author(s):  
Xuhui Zhang ◽  
Meng Zuo ◽  
Houzhi Tan ◽  
Zhonghua Wu ◽  
Zhengpeng Lai ◽  
...  
Keyword(s):  
Energy Harvester ◽  
Random Excitation ◽  
Dynamics Analysis ◽  
Piezoelectric Energy

Performance of a novel dual-magnet tri-stable piezoelectric energy harvester subjected to random excitation

2021 ◽  
Vol 239 ◽  
pp. 114246
Author(s):  
Shuailing Sun ◽  
Yonggang Leng ◽  
Xukun Su ◽  
Yuyang Zhang ◽  
Xiaoyu Chen ◽  
...  
Keyword(s):  
Energy Harvester ◽  
Random Excitation ◽  
Piezoelectric Energy

Energy Harvesting From Broadband Random Vibrations: Comparison of Single-Mode and Multi-Mode Electroelastic Solutions

2012 ◽  
Author(s):  
Sihong Zhao ◽  
Alper Erturk
Keyword(s):  
Energy Harvesting ◽  
White Noise ◽  
Energy Harvester ◽  
Vibrational Energy ◽  
Single Mode ◽  
Random Excitation ◽  
Distributed Parameter ◽  
Random Vibrations ◽  
Piezoelectric Energy ◽  
Multi Mode

Vibration-based energy harvesting has been heavily researched over the last decade with a primary focus on resonant excitation. However, ambient vibrational energy often has broader frequency content than a single harmonic, and in many cases it is entirely stochastic. As compared to the literature of deterministic energy harvesting, very few authors presented modeling approaches for energy harvesting from broadband random vibrations. These efforts have combined the input statistical information with the single-degree-of-freedom (SDOF) dynamics of the energy harvester to express the statistical electromechanical response characteristics. In most cases, the motion input (base acceleration) is assumed to be ideal white noise. White noise has a flat power spectral density (PSD) that might in fact excite higher vibration modes of an electroelastic energy harvester. In particular, piezoelectric energy harvesters constitute such continuous electroelastic systems with more than one vibration mode. This paper presents modeling and simulations of piezoelectric energy harvesting from broadband random vibrations based on distributed-parameter electroelastic solution. For white noise–type base acceleration of a given PSD level, first the general solution of the distributed-parameter problem is given. Closed-form representations are extracted for the single-mode case and these are analogous to the SDOF equations reported in the literature of energy harvesting. It is reported that the single-mode predictions might result in significant mismatch as compared to multi-mode predictions. Using the electroelastic solution, soft and hard piezoelectric power generators are compared under broadband random excitation. Shunt damping effect of power generation on the stochastic vibration response under broadband random excitation is also reported.

scholarly journals Vibro-Shock Dynamics Analysis of a Tandem Low Frequency Resonator—High Frequency Piezoelectric Energy Harvester

Sensors ◽  
2017 ◽  
Vol 17 (5) ◽  
pp. 970 ◽  
Author(s):  
Darius Žižys ◽  
Rimvydas Gaidys ◽  
Vytautas Ostaševičius ◽  
Birutė Narijauskaitė
Keyword(s):  
High Frequency ◽  
Energy Harvester ◽  
Low Frequency ◽  
Dynamics Analysis ◽  
Piezoelectric Energy ◽  
Shock Dynamics

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.

Dynamics analysis of the portal frame model with non-ideal drive as an energy harvester

2018 ◽  
Author(s):  
João Pedro Canisso Valese Norenberg ◽  
Marcus Varanis ◽  
José Manoel Balthazar ◽  
Angelo Marcelo Tusset
Keyword(s):  
Energy Harvester ◽  
Dynamics Analysis ◽  
Frame Model ◽  
Portal Frame

scholarly journals A Multi-Mode Broadband Vibration Energy Harvester Composed of Symmetrically Distributed U-Shaped Cantilever Beams

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 203
Author(s):  
Xiaohua Huang ◽  
Cheng Zhang ◽  
Keren Dai
Keyword(s):  
Energy Harvester ◽  
Low Frequency ◽  
Experimental Results ◽  
Vibration Energy ◽  
Cantilever Beams ◽  
Resonant Frequencies ◽  
Promising Alternative ◽  
Piezoelectric Energy ◽  
Straight Beam ◽  
Resonance Frequencies

Using the piezoelectric effect to harvest energy from surrounding vibrations is a promising alternative solution for powering small electronic devices such as wireless sensors and portable devices. A conventional piezoelectric energy harvester (PEH) can only efficiently collect energy within a small range around the resonance frequency. To realize broadband vibration energy harvesting, the idea of multiple-degrees-of-freedom (DOF) PEH to realize multiple resonant frequencies within a certain range has been recently proposed and some preliminary research has validated its feasibility. Therefore, this paper proposed a multi-DOF wideband PEH based on the frequency interval shortening mechanism to realize five resonance frequencies close enough to each other. The PEH consists of five tip masses, two U-shaped cantilever beams and a straight beam, and tuning of the resonance frequencies is realized by specific parameter design. The electrical characteristics of the PEH are analyzed by simulation and experiment, validating that the PEH can effectively expand the operating bandwidth and collect vibration energy in the low frequency. Experimental results show that the PEH has five low-frequency resonant frequencies, which are 13, 15, 18, 21 and 24 Hz; under the action of 0.5 g acceleration, the maximum output power is 52.2, 49.4, 61.3, 39.2 and 32.1 μW, respectively. In view of the difference between the simulation and the experimental results, this paper conducted an error analysis and revealed that the material parameters and parasitic capacitance are important factors that affect the simulation results. Based on the analysis, the simulation is improved for better agreement with experiments.

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