Farajvand, Mahdiyeh and García-Violini, Demián and Ringwood, John
(2023)
Characterising uncertainty and external
disturbance sources in wave tank experiments
for wave energy converter modelling.
Proceedings of the 15th European Wave and Tidal Energy Conference.
pp. 1-10.
Abstract
Uncertainty, whether inherent to the dynamical system under study or due to external factors, is intrinsic
to experimental wave tank tests of wave energy converter
(WEC) devices. In order to obtain a representative WEC
model from wave tank experiments, it is crucial to identify
and characterise nonlinearities, uncertainty, and external
disturbance affecting the experimental data, to understand
the level of data contamination at different operating conditions of the system, and to apply the proper methodologies
to compensate for those effects, where appropriate. To this
aim, the current study analyses wave tank data from an
experimental campaign on a 1/20 scale Wavestar prototype
device to identify a range of linear WEC models, using
force-input experiments at various levels, with a focus on
the identification and quantification of parameters that may
cause uncertainty in the WEC model. To this end, the
analysed phenomena are classified into electromechanical,
hydrodynamic, and structural (support) parts of the test
setup. Effective data pre-processing and post-processing
steps, to mitigate noise and disturbances, as well as
preserving the physical system behaviour, are applied
to identifying representative linear WEC models, which
serves as staring point for robust WEC controller synthesis.
Thus, careful estimation of representative models and a
associated uncertainty region overcomes the limitations of
a single linear model by covering the complete operational
space of the device.
| Item Type: |
Article
|
| Keywords: |
Wave energy converter; WEC; Experimental WEC model; Uncertainty quantification; Linearised;
WEC models; |
| Academic Unit: |
Faculty of Science and Engineering > Electronic Engineering |
| Item ID: |
18989 |
| Depositing User: |
Professor John Ringwood
|
| Date Deposited: |
08 Oct 2024 15:03 |
| Journal or Publication Title: |
Proceedings of the 15th European Wave and Tidal Energy Conference |
| Publisher: |
European Wave and Tidal Energy Conference EWTEC |
| Refereed: |
Yes |
| URI: |
|
| Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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