Insights on the Effects of Magnetic Forces on the Efficiency of Vibration Energy Harvesting Absorbers in Controlling Dynamical Systems

Tyler Alvis, Mikhail Mesh and Abdessattar Abdelkefi ()
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Tyler Alvis: Department of Mechanical and Aerospace Engineering, New Mexico State University, Las Cruces, NM 88003, USA
Mikhail Mesh: Sandia National Laboratories, Albuquerque, NM 87185, USA
Abdessattar Abdelkefi: Department of Mechanical and Aerospace Engineering, New Mexico State University, Las Cruces, NM 88003, USA

Energies, 2023, vol. 16, issue 3, 1-46

Abstract: This study investigates the effects of magnetic constraints on a piezoelectric energy harvesting absorber while simultaneously controlling a primary structure and harnessing energy. An accurate forcing representation of the magnetic force is investigated and developed. A reduced-order model is derived using the Euler–Lagrange principle, and the impact of the magnetic force is evaluated on the absorber’s static position and coupled natural frequency of the energy harvesting absorber and the coupled primary absorber system. The results show that attractive magnet configurations cannot improve the system substantially before pull-in occurs. A rigorous eigenvalue problem analysis is performed on the absorber’s substrate thickness and tip mass to effectively design an energy harvesting absorber for multiple initial gap sizes for the repulsive configurations. Then, the effects of the forcing amplitude on the primary structure absorber are studied and characterized by determining an effective design of the system for a simultaneous reduction in the primary structure’s motion and improvement in the harvester’s efficiency.

Keywords: vibration energy harvesting; vibration mitigation; magnetic force; nonlinear dynamics; nonlinear characterization (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: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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