Secondary Impact bandwidth effects using Embedded Vertical Moving Mass Energy Harvester

We examined energy harvesting using a vertical composite laminate beam with an additional moving mass subjected to kinematic harmonic excitation. The gravity effect and the moving tip mass applied to the system cause considerable changes in effective spring-mass characteristics of the bending beam. Simultaneously, we observed dynamical beam damping by an additional degree of freedom and non-linear effects including friction between the moving mass and the beam structure. The experiments were performed on the beam excited kinematically by a shaker, while beam velocity measurements were made by a scanning laser vibrometer. We applied modal analysis in the limit of a fairly low excitation level. The selected modal vibrations are illustrated by corresponding output time series.

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Optimization of a two-mass vibration-based electromagnetic energy harvester using simulated annealing method

Journal of Low Frequency Noise Vibration and Active Control ◽

10.1177/1461348418757887 ◽

2018 ◽

Vol 37 (1) ◽

pp. 90-106 ◽

Cited By ~ 3

Author(s):

Min-Chie Chiu ◽

Ying-Chun Chang ◽

Long-Jyi Yeh ◽

Chiu-Hung Chung

Keyword(s):

Optimal Design ◽

Energy Harvester ◽

Electrical Power ◽

Mode Shapes ◽

Design Parameters ◽

Generation Model ◽

Mass Energy ◽

The One ◽

Electrical Generation ◽

The Revolution

In this paper, a theoretical mathematical model in conjunction with an electrical generation model is examined. Using a simulated algorithm, the optimal design of a two-mass energy harvester that finds the maximal electrical power will be assessed. Before the optimal design is performed, the influence of the electrical power with respect to design parameters such as the magnet’s height, the diameter, the stiffness of the lower springs, the stiffness of the upper springs, the revolution of the lower coil, the revolution of the upper coil, the diameter of the coil’s wire, and the electrical resistance of the loading will be analyzed. Results reveal that the design parameters play essential roles in maximizing electrical power. The two mode shapes of the two-mass energy harvester also occur at the targeted forcing frequencies. The electrical power is optimally extracted at the two primary forcing frequencies, i.e. 12 and 30 Hz. Moreover, it is obvious that the induced electrical power of the two-mass energy harvester will be superior to that of the one-mass energy harvester.

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Design of a New Piezoelectric Energy Harvester Based on Secondary Impact

Ferroelectrics ◽

10.1080/00150193.2013.822773 ◽

2013 ◽

Vol 449 (1) ◽

pp. 83-93 ◽

Cited By ~ 11

Author(s):

Hyun Jun Jung ◽

Ki Hwan Baek ◽

Sinichi Hidaka ◽

Daniel Song ◽

Se Bin Kim ◽

...

Keyword(s):

Energy Harvester ◽

Secondary Impact ◽

Piezoelectric Energy

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Rolling mass energy harvester for very low frequency of input vibrations

Mechanical Systems and Signal Processing ◽

10.1016/j.ymssp.2018.05.062 ◽

2019 ◽

Vol 125 ◽

pp. 215-228 ◽

Cited By ~ 13

Author(s):

Jan Smilek ◽

Zdenek Hadas ◽

Jan Vetiska ◽

Steve Beeby

Keyword(s):

Energy Harvester ◽

Low Frequency ◽

Mass Energy ◽

Very Low Frequency

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An Analytical Formulation of the Railway Vehicles-Bridge Interactions Using a Generalized Beam Element with Moving Mass

ICRT 2017 ◽

10.1061/9780784481257.084 ◽

2018 ◽

Author(s):

Ying Wen ◽

Rui Tao

Keyword(s):

Beam Element ◽

Moving Mass ◽

Analytical Formulation ◽

Railway Vehicles

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Simply supported FPEDs connected by springs for broadband energy harvesting

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209323 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 201-210

Author(s):

Yoshikazu Tanaka ◽

Satoru Odake ◽

Jun Miyake ◽

Hidemi Mutsuda ◽

Atanas A. Popov ◽

...

Keyword(s):

Energy Harvesting ◽

Evaluation Method ◽

Energy Harvester ◽

Vibrational Energy ◽

Functional Materials ◽

Vibration Energy ◽

Theoretical Evaluation ◽

Vibration Energy Harvester ◽

Polyvinylidene Difluoride ◽

Simply Supported

Energy harvesting methods that use functional materials have attracted interest because they can take advantage of an abundant but underutilized energy source. Most vibration energy harvester designs operate most effectively around their resonant frequency. However, in practice, the frequency band for ambient vibrational energy is typically broad. The development of technologies for broadband energy harvesting is therefore desirable. The authors previously proposed an energy harvester, called a flexible piezoelectric device (FPED), that consists of a piezoelectric film (polyvinylidene difluoride) and a soft material, such as silicon rubber or polyethylene terephthalate. The authors also proposed a system based on FPEDs for broadband energy harvesting. The system consisted of cantilevered FPEDs, with each FPED connected via a spring. Simply supported FPEDs also have potential for broadband energy harvesting, and here, a theoretical evaluation method is proposed for such a system. Experiments are conducted to validate the derived model.

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