Rotation control of the parametric pendulum with a view on wave energy applications

Abstract

This paper presents advancements made by Grupo de Análisis en Multifísica Aplicada regarding the application of a rotation control technique for the parametric pendulum. This technique is part of the ongoing research line on wave energy converters. The control action consists of an assistance torque, which is appropriately applied to a pendulum wheel to increase its angular velocity. Experiments are presented, demonstrating that rotations can be achieved and sustained using this technique under both harmonic and irregular forcing. The latter is particularly significant for potential use in wave energy converters, which is the primary engineering application being pursued. A mathematical model of the control law is also introduced, introducing a torque function in the classical equation of the parametric pendulum. This model is experimentally validated and then employed to explore a broader range of possibilities for the control technique under study.