Automatic Resonance Tuning Technique for an Ultra-Broadband Piezoelectric Energy Harvester

Sallam A. Kouritem (), Muath A. Bani-Hani, Mohamed Beshir, Mohamed M. Y. B. Elshabasy and Wael A. Altabey ()
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Sallam A. Kouritem: Department of Mechanical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
Muath A. Bani-Hani: Department of Aeronautical Engineering, Jordan University of Science and Technology, Irbid 22110, Jordan
Mohamed Beshir: School of Engineering, University of Edinburgh, Edinburgh EH8 9YL, UK
Mohamed M. Y. B. Elshabasy: Department of Mechanical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
Wael A. Altabey: Department of Mechanical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt

Energies, 2022, vol. 15, issue 19, 1-20

Abstract: The main drawback of energy harvesting using the piezoelectric direct effect is that the maximum electric power is generated at the fundamental resonance frequency. This can clearly be observed in the size and dimensions of the components of any particular energy harvester. In this paper, we are investigating a new proposed energy harvesting device that employs the Automatic Resonance Tuning (ART) technique to enhance the energy harvesting mechanism. The proposed harvester is composed of a cantilever beam and sliding masse with varying locations. ART automatically adjusts the energy harvester’s natural frequency according to the ambient vibration natural frequency. The ART energy harvester modifies the natural frequency of the harvester using the motion of the mobile (sliding) mass. An analytical model of the proposed model is presented. The investigation is conducted using the Finite Element Method (FEM). THE FEM COMSOL model is successfully validated using previously published experimental results. The results of the FEM were compared with the experimental and analytical results. The validated model is then used to demonstrate the displacement profile, the output voltage response, and the natural frequency for the harvester at different mass positions. The bandwidth of the ART harvester (17 Hz) is found to be 1130% larger compared to the fixed resonance energy harvester. It is observed that the proposed broadband design provides a high-power density of 0.05 mW mm −3 . The piezoelectric dimensions and load resistance are also optimized to maximize the output voltage output power.

Keywords: piezoelectric energy harvesting; broad bandwidth; automatic resonance tuning; FEM (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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