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Wednesday, July 10 • 10:30 - 10:50
BASIC DEVELOPMENT AND OPTIMIZATION OF INVERTED TYPE POWER GENERATOR BASED ON AUTO-PARAMETRIC RESONANCE FOR LOW FREQUENCY

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In this report, as the environmental power generation and wave power generation device for low frequency external vibration, inverted pendulum type power generator based on auto-parametric resonance is devised. Theoretical study and experimental verification of proposed device were performed. The auto-parametric resonance is an unstable vibration generated by nonlinear coupling between the main system and the subsystem in which the vibration directions of two degrees of freedom or more are orthogonal. From some previous other studies, it was confirmed the high efficiency of generator driven by self-excited vibration. The purpose of this research is to develop a system which converts vibration external force of low frequency band to high efficiency for rotation of pendulum using this auto-parametric excitation. We have devised a model of a two degree of freedom system composed of an inverted pendulum supported by a spring system, and a mass-spring system. Its natural frequency can be adjusted for lower by changing the supporting points of springs. Approximate analysis and shooting method were used to calculate the amplitude of the main resonance. We derive the characteristic exponent, nonlinear amplitude, excited and dissipated energy. From these results, we examined the influence and optimal parameters theoretically. Experiments using model device were also conducted to verify the validity of the theoretical results.

Moderators
avatar for Simon Jones

Simon Jones

Associate Professor, Rose-Hulman Institute of Technology
Professional interests include undergraduate engineering education, finite element modeling, ground-borne vibrations, vibrations of musical instruments, and dynamics of toys.
GM

Guilhem Michon

Professor, ISAE-SUPAERO

Authors

Wednesday July 10, 2019 10:30 - 10:50 EDT
St-Laurent 7
  T07 Struct. dyn. & nonlin. vib., RS03 Struct ac & vibr

Attendees (7)