Research on Output Characteristics of Double-Ended Fixed Beam Piezoelectric Energy Harvester Under Random Excitation

2020 ◽  
Vol 21 (6) ◽  
pp. 1075-1083
Author(s):  
Lianmin Cao ◽  
Yong Cai ◽  
Guotai Xu ◽  
Jiulong Cui
Keyword(s):  
Energy Harvester ◽  
Random Excitation ◽  
Piezoelectric Energy ◽  
Output Characteristics ◽  
Fixed Beam

Performance analysis of a lever piezoelectric energy harvester for roadway applications

2021 ◽  
pp. 1045389X2110014
Author(s):  
Guangya Ding ◽  
Hongjun Luo ◽  
Jun Wang ◽  
Guohui Yuan
Keyword(s):  
Output Power ◽  
Energy Harvester ◽  
Open Circuit ◽  
Traffic Load ◽  
Energy Harvesters ◽  
Speed Sensor ◽  
Piezoelectric Energy ◽  
Optimal Load ◽  
Self Powered ◽  
Output Characteristics

A novel lever piezoelectric energy harvester (LPEH) was designed for installation in an actual roadway for energy harvesting. The model incorporates a lever module that amplifies the applied traffic load and transmits it to the piezoelectric ceramic. To observe the piezoelectric growth benefits of the optimized LPEH structure, the output characteristics and durability of two energy harvesters, the LPEH and a piezoelectric energy harvester (PEH) without a lever, were measured and compared by carrying out piezoelectric performance tests and traffic model experiments. Under the same loading condition, the open circuit voltages of the LPEH and PEH were 20.6 and 11.7 V, respectively, which represents a 76% voltage increase for the LPEH compared to the PEH. The output power of the LPEH was 21.51 mW at the optimal load, which was three times higher than that of the PEH (7.45 mW). The output power was linearly dependent on frequency and load, implying the potential application of the module as a self-powered speed sensor. When tested during 300,000 loading cycles, the LPEH still exhibited stable structural performance and durability.

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 A Piezoelectric and Electromagnetic Hybrid Galloping Energy Harvester with the Magnet Embedded in the Bluff Body

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 626
Author(s):  
Xia Li ◽  
Cheng Bi ◽  
Zhiyuan Li ◽  
Benxue Liu ◽  
Tingting Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Wind Speed ◽  
Output Power ◽  
Bluff Body ◽  
Energy Harvester ◽  
Electromagnetic Energy ◽  
Piezoelectric Energy ◽  
Field Lines ◽  
Output Characteristics ◽  
Effective Output

To meet the needs of low-power microelectronic devices for on-site self-supply energy, a galloping piezoelectric–electromagnetic energy harvester (GPEEH) is proposed. It consists of a galloping piezoelectric energy harvester (GPEH) and an electromagnetic energy harvester (EEH), which is installed inside the bluff body of the GPEH. The vibration at the end of the GPEH cantilever drives the magnet to vibrate, so that electromagnetic energy can be captured by cutting off the induced magnetic field lines. The coupling structure is a two-degree-of-freedom motion, which improves the output power of the energy harvester. Based on Hamilton’s variational principle and quasi-static hypothesis, the piezoelectric–electromagnetic vibrated coupling equation is established, and the output characteristics of GPEEH are obtained by the method of numerical simulation. Using the method of numerical simulation, studies a series of parameters on the output performance. when the wind speed is 9 m/s, the effective output power of the GPEEH is compared with the classical galloping piezoelectric energy harvester (CGPEH) who is no magnet. It is found that the output power of GPEEH 121% higher than the output power of CGPEH. Finally, set up an experimental platform, and test and verify. The experimental analysis results show that the simulated output parameter curves are basically consistent with the experimental drawing curves. In addition, when the wind speed is 9 m/s, under the same parameters, the effective output power of the GPEEH is 112.5% higher than that of the CGPEH. The correctness of the model is verified.

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
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