Damping ratio and power output prediction of an electromagnetic energy harvester designed through finite element analysis
| Autor: | Chung Ket Thein, Yi-Chung Shu, Faruq Muhammad Foong |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Physics Damping ratio Cantilever Basis (linear algebra) Acoustics Metals and Alloys 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Finite element method Surfaces Coatings and Films Electronic Optical and Magnetic Materials Stress (mechanics) Amplitude 0103 physical sciences Power output Electrical and Electronic Engineering 0210 nano-technology Instrumentation Voltage |
| Zdroj: | Sensors and Actuators A: Physical. 286:220-231 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/j.sna.2018.12.041 |
| Popis: | This paper presents a novel and simplified method to predict the damping ratio and power output of a cantilever-based electromagnetic vibration energy harvester through finite element analysis. A strong relationship was determined between the mechanical damping of a structure and the resonant stress at the clamped end of the structure under critically damped condition, otherwise described as the critically damped stress. This relation was used as a basis to develop a material-specific damping stress equation. The equation was then integrated into FEA to analyse a certain electromagnetic vibration energy harvester design by considering the variation in damping and power output for every structural change. The effect of the phase difference on the power output of the electromagnetic harvester was also considered. The FEA design that recorded the highest power output prediction (11.1% higher than the initial structure) was then verified experimentally, displaying a good agreement with experimental results, recording an error of less than 5.0% for the amplitude and voltage evaluation and 8.0% for the power output assessment. Hence, this validates the accuracy of the proposed method in predicting not only the mechanical damping of regular cantilever beams, but also other cantilever beam-based structures. |
| Databáze: | OpenAIRE |
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