| Vibrational Energy Harvesting from a Monostable Piezomagnetoelastic Structure with Multi-frequency Excitation |
| کد مقاله : 1120-ISAV |
| نویسندگان: |
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هادی پرتوی1، Arash Bahrami *2، علی صدیقی3 1دانشکده مهندسی مکانیک، پردیس دانشکدههای فنی دانشگاه تهران 2School of Mechanical Engineering, College of Engineering, University of Tehran 3دانشگاه تهران، پردیس دانشکده های فنی، دانشکده مهندسی مکانیک |
| چکیده مقاله: |
| The present article proposes the idea of multi-frequency excitation to harvest energy from ambient low-frequency vibrations. The nonlinear piezomagnetoelastic set-up, operating in the monostable mode, is considered. Since low-frequency vibrations are often dominant in the ambient, it is vital to design harvesters with natural frequencies close to these ambient vibrations. On the other hand, due to small size of most harvesters, their fundamental frequency is often larger than frequencies available in the ambient. To overcome this challenge, we pro-pose the idea of multi-frequency excitation and employing secondary resonances such as combination and simultaneous resonances, occurring in nonlinear systems. Nonlinear differential equations governing the harvester dynamics are solved using the direct harmonic balance method. Numerical results are presented for a real energy harvester subjected to a dual-frequency excitation. It is found out that multi-frequency excitation and exploiting combination and simultaneous resonance result in significant enhancement in the harvester output voltage and power. It is also found out that the simultaneous resonance is more effective in improving the harvester performance compared to the combination resonance. |
| کلیدواژه ها: |
| Energy harvesting; multifrequency excitation; nonlinear dynamics; piezomagnetoelastic |
| وضعیت : مقاله برای ارائه شفاهی پذیرفته شده است |