An Electromagnetic Vibration Energy Harvester with a Tunable Mass Moment of Inertia
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- Peter Ibrahim
- Mechanical Design and Production Department, Faculty of Engineering, Cairo University, Giza 12613, Egypt
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- Mustafa Arafa
- Mechanical Engineering Department, American University in Cairo, New Cairo 11835, Egypt
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- Yasser Anis
- Mechanical Design and Production Department, Faculty of Engineering, Cairo University, Giza 12613, Egypt
説明
<jats:p>This paper presents a vibration-based electromagnetic energy harvester whose resonance frequency can be adjusted to match that of the excitation. Frequency adjustment is attained by controlling a rotatable arm, with tuning masses, at the tip of a cantilever-type energy harvester, thereby changing the effective mass moment of inertia of the system. The rotatable arm is mounted on a servomotor that is autonomously controlled through a microcontroller and a photo sensor to keep the device at resonance for maximum power generation. A mathematical model is developed to predict the system response for different design parameters and to estimate the generated power. The system is investigated analytically by a distributed-parameter model to study the natural frequency variation and dynamic response. The analytical model is verified experimentally where the frequency is tuned from 8 to 10.25 Hz. A parametric study is performed to study the effect of each parameter on the system behavior.</jats:p>
収録刊行物
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- Sensors
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Sensors 21 (16), 5611-, 2021-08-20
MDPI AG