Abstract
Energy transfers from a wave excited pendulum to an energy-received one in a multiple pendulums were observed in a wave generator waterway. When the natural period of the energy-received oscillator is half of the wave period, the efficiency of the energy transfer was maximized. The mechanism of this phenomena was explained from Grover algorithm in multiple oscillations or autoparametric excitation. Since power generation can be apart from the excited pendulum in the multiple oscillator, quality of frequency in power generation and the system endurance could be increased.