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research-article

A low-cost motion capture system for small-scale wave energy device tank testing

[+] Author and Article Information
Francesco Paparella

Centre for Ocean Energy Research (COER), Maynooth University, Co. Kildare, Ireland
francesco.paparella.2014@mumail.ie

Satja Sivcev

Mobile and Marine Robotics Research Centre, Marine and Renewable Energy Ireland (MaREI), University of Limerick, Limerick, Ireland
satja.sivcev@ul.ie

Daniel Toal

Mobile and Marine Robotics Research Centre, Marine and Renewable Energy Ireland (MaREI), University of Limerick, Limerick, Ireland
daniel.toal@ul.ie

John V. Ringwood

Centre for Ocean Energy Research (COER), Maynooth University, Co. Kildare, Ireland
john.ringwood@nuim.ie

1Corresponding author.

ASME doi:10.1115/1.4041608 History: Received February 07, 2018; Revised September 25, 2018

Abstract

The measurement of the motion of a small scale wave energy device during wave tank tests is important for the evaluation of its response to waves and the assessment of power production. Usually, the motion of a small scale wave energy converter is measured using an optical motion tracking system with high precision and sampling rate. However, the cost for an optical motion tracking system can be considerable high and, therefore, the overall cost for tank testing is increased. This paper proposes a low-cost capture system composed of an inertial measurement unit and ultrasound sensors. The measurements from the ultrasound sensors are combined optimally with the measurements from the inertial measurement unit through an extended Kalman filter in order to obtain an accurate estimation of the motion of a wave energy converter.

Copyright (c) 2018 by ASME
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