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Nonlinear stiffness and damping to increase efficacy of tuning-fork energy harvester

Grant number: 16/11200-9
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): September 01, 2016
Effective date (End): August 31, 2018
Field of knowledge:Engineering - Mechanical Engineering - Mechanics of Solids
Principal Investigator:Marcos Silveira
Grantee:Arthur Nicolini Corazza
Host Institution: Faculdade de Engenharia (FE). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil


In this work, the dynamical behavior of a tuning-fork gyroscope for energy harvesting will be studied. The gyroscope consists of two vertical beams fixed on a suspension mass, which is subject to vertical excitation force. It can be shown that the system is parametrically excited. When the beams oscillate in phase, the parametric excitation can lead to vibration in the horizontal direction. The problem is particularly interesting for energy harvesting. Due to the interaction between the degrees of freedom of the system, energy is transferred from the vertical toward the horizontal direction. Parametric studies will be performed to analyse the dynamical behavior of the system with respect to energy recovery performance. The impact of the introduction of nonlinear stiffness and damping to increase the device efficiency will be analysed. The existence of periodic, quasi-periodic and chaotic regimes will be investigated, and its influence on the energy transfer between the vertical and horizontal directions. (AU)

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Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
CORAZZA, Arthur Nicolini. Use of nonlinear stiffness and damping to increase energy recovery efficiency of the tuning fork type gyroscope. 2018. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Bauru Bauru.

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