Use of nonlinear stiffness and damping to increase energy recovery efficiency of the tuning fork type gyroscope

Author(s)

Arthur Nicolini Corazza

• Document type: Master's Dissertation
• Press: Bauru. 2019-02-06.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Bauru
• Defense date: 2018-12-12
• Advisor: Marcos Silveira

Abstract

In this work, the dynamical behaviour 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 behaviour 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 analised. The existence of periodic and chaotic regimes will be investigated, and its influence on the energy transfer between the vertical and horizontal directions. (AU)

• FAPESP's process: 16/11200-9 - Nonlinear stiffness and damping to increase efficacy of tuning-fork energy harvester
• Grantee: Arthur Nicolini Corazza
• Support Opportunities: Scholarships in Brazil - Master