@article{bda6e6523ce64563a1f2a3b6325b6e64,
title = "Automatic resonance tuning mechanism for ultra-wide bandwidth mechanical energy harvesting",
abstract = "Piezoelectric energy harvesters typically exhibit sharp peak in output power around resonance frequency (small bandwidth), which presents complexity in harvesting ambient vibrations that normally comprise of multiple frequencies. Prior attempts in designing energy harvesters with broadband response have met with practical challenges in terms of low output power, large mass and weight, and small improvements in bandwidth. Here, we report a breakthrough in demonstrating ultra-wide bandwidth piezoelectric energy harvesters through the automatic resonance tuning (ART) phenomenon. ART provides energy harvester ability to adjust its natural frequency in conjunction with ambient vibration without human intervention or additional tuning energy. The ART energy harvester utilizes the motion of the mobile proof mass in a doubly clamped oscillating beam structure to modulate the natural frequency of the beam. Detailed investigations are conducted in providing a fundamental understanding of the operation mechanism of the ART harvester by invoking beam dynamics over a wide range of vibration conditions. It is shown that bandwidth of the ART harvester (36 Hz) is 1400% larger compared to the fixed resonance energy harvester. The practical feasibility of the ART mechanism is demonstrated by evaluating the performance of the harvester mounted on a rotary pump. The results demonstrate that ART mechanism can provide the much-needed breakthrough in the deployment of mechanical energy harvesters for naturally occurring vibrations.",
keywords = "Automatic resonance tuning, Broad bandwidth, Energy harvesting, Piezoelectric",
author = "Shin, {Youn Hwan} and Jaehoon Choi and Kim, {Seong Jin} and Sangtae Kim and Deepam Maurya and Sung, {Tae Hyun} and Shashank Priya and Kang, {Chong Yun} and Song, {Hyun Cheol}",
note = "Funding Information: Prof. Shashank Priya is currently professor in Department of Materials Science and Engineering and also serve as associate vice president for research and director of strategic initiatives in the Office of the Senior Vice President for Research (OSVPR) at Pennsylvania State University. His research is focused in the areas related to multifunctional materials, energy and bio-inspired systems. He has published over 400 peer-reviewed journal papers/book chapters and more than 60 conference proceedings covering these topics. Additionally, he has published more than ten US patents, and ten edited books. He is the founder and chair of the Annual Energy Harvesting Meeting ( http://ceramics.org/event/3rd-annual-energy-harvesting-society-meeting ). Dr. Shashank Priya's research is funded by DARPA, AFOSR, ARO, NSF, DOE, ONR and several industries. He is also serving as the member of the Honorary Chair Committee for the International Workshop on Piezoelectric Materials and Applications (IWPMA). Funding Information: The authors acknowledge this work was supported by the Energy Technology Development Project (KETEP) grant funded by the Ministry of Trade, Industry and Energy, Republic of Korea (Development of wideband piezoelectric energy harvesting for standalone low power smart sensor, Project no. 2018201010636A ) and the Korea Institute of Science and Technology ( 2E30410 ). H.-C. S., S. K., and C.-Y. K. would like to acknowledge the support from the National Research Council of Science & Technology grant by the Korea government (MSIP) (No. CAP-17-04-KRISS ). S.P. acknowledges the support from Office of Naval Research through the grant number N000141613043 . Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",
year = "2020",
month = nov,
doi = "10.1016/j.nanoen.2020.104986",
language = "English",
volume = "77",
journal = "Nano Energy",
issn = "2211-2855",
publisher = "Elsevier BV",
}
