Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Design and Experimental Analysis of a Tuned Electromagnetic Vibration Absorber with Energy Harvesting for Linear Field
Submission Author:
Rafael de Carvalho Puglisi , SP
Co-Authors:
Rafael de Carvalho Puglisi, Agenor Fleury
Presenter: Rafael de Carvalho Puglisi
doi://10.26678/ABCM.COBEM2019.COB2019-0015
Abstract
In engineering, energy transfer is revealed as an undesirable or desirable vibrational phenomenon. In mechanical systems, dynamic control to mitigate undesirable vibrations is accomplished through several techniques, among the most usual, the tunable mass damper (TMD). In electrical systems, ambient vibrations may be desirable and converted into useful electrical energy. In order to combine these phenomena and reduce operating costs, it is necessary to design robust tunable devices capable of operating efficiently over a wide frequency band. This work aims to design and experimentally analyze a tunable (semi-active) electromagnetic vibration absorber with energy harvesting (TEMVAEH) through the deliberate introduction of non-linearities. TEMVAEH consists of a non-linear mass-spring-damper system with a central oscillating magnet oriented under magnetic repulsive forces and a coil installed. Analytical methods and numerical simulations are developed to analyze the vibrational behavior of the system when induced by harmonic based excitation. The electromagnetic transduction factor that couples the mechanical to electrical system is identified. It is shown that the variation of the distance between magnets provides adjustable resonance to the system and that the resulting magnetic restoring force has a linear operating range. It is verified that the field of maximum energy harvesting is contained in this band, confirming its relevance. The results show that there is a relation of importance of the induced voltage and the electrical damping through the variation of the load resistance, affecting attenuation and power generation of the system. Finally, the aim is to present the best models and results of damping parameters in order to obtain information as a design guide to optimization and future semi-active control strategies.
Keywords
Dynamic vibration control, Tunable Electromagnetic Absorber, Energy harvesters, Semi-active device, energy harvesting
