Numerical Simulations and Control of Offshore Energy Harvesting Using Piezoelectric Materials in a Portal Frame Structure

Wagner B Lenz,Rodrigo T Rocha,Angelo M Tusset,Mauricio A Ribeiro,Jose M Balthazar,Mi-An Xue

doi:10.1155/2021/6651999

Wagner B Lenz, Rodrigo T Rocha + Show 4 more

Open Access

https://doi.org/10.1155/2021/6651999

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Abstract

Buoy systems are an alternative for micropowering small devices in remote locations. Portal frames are very useful to harvest the energy of the waves into usable energy. Thus, using the current models for a portal frame in the literature and the spectrum of available energy in sea waves, a nonlinear mathematical model accounting for the coupling of a nonlinear piezoelectric material is considered. The neighbour of selected variables is analyzed and then optimized by a process utilizing the particle swarm optimization (PSO) algorithm. Furthermore, an optimal control using the linear-quadratic regulator (LQR) controller is applied to control the load resistance of the piezoelectric circuit. The optimization process and the LQR show to be effective. The results show a general gain due to optimization and a relatively small gain using the controller.

Highlights

Due to the large coverage area of the ocean on the Earth’s surface, offshore energy sources have been very attractive, bringing the attention of scientists and engineers of the energy field. is enormous interest stands out for the power that can be used as a source for consumption in different ways [1,2,3].is energy is determined by the mechanical waves formed by the ocean’s water motion
Several devices work with the amplitude of the tides, such as those that lift the floats that work with the sea waves generated by the wind, devices that work with the torsion system, and the ones that work by creating air pressure and generating electricity [4]
E authors in [5, 6] utilized an air turbine actuated by the displacement through the oscillating of the ocean waves for energy generation, where such energy is stored in the form of compressed air. e authors in [7] converted the ocean wave energy through oscillating bodies coupled to a linear electrical generator

Summary

Introduction

Due to the large coverage area of the ocean on the Earth’s surface, offshore energy sources have been very attractive, bringing the attention of scientists and engineers of the energy field. is enormous interest stands out for the power that can be used as a source for consumption in different ways [1,2,3].is energy is determined by the mechanical waves formed by the ocean’s water motion. Numerical results showed that energy harvesting can be influenced by nonlinear parameters of the piezoelectric model.

Results

Conclusion