Faedo, Nicolás and Dores Piuma, Francisco Javier and Giorgi, Giuseppe and Ringwood, John V.
(2020)
Nonlinear model reduction for wave energy systems: a moment-matching-based approach.
Nonlinear Dynamics, 102 (3).
pp. 1215-1237.
ISSN 0924-090X
Abstract
Abstract Wave energy converters (WECs) inherently require appropriate control system technology to
ensure maximum energy absorption from ocean waves,
consequently reducing the associated levelised cost of
energy and facilitating their successful commercialisation. Regardless of the control strategy, the definition of the control problem itself depends upon the
specification of a suitable WEC model. Not only is
the structure of the model relevant for the definition
of the control problem, but also its associated complexity: given that the control law must be computed in
real-time, there is a limit to the computational complexity of the WEC model employed in the control design
procedure, while there is also a limit to the (analytical)
complexity of mathematical models for which a control
solution can be efficiently found. This paper presents
a systematic nonlinear model reduction by moment matching framework for WEC systems, capable of providing control-oriented WEC models tailored for the
control application, which inherently preserves steady state response characteristics. Existence and uniqueness of the associated nonlinear moment for WECs are proved in this paper, for a general class of systems. Given that the definition of nonlinear moments depends upon the solution of a nonlinear partial differential equation, an approximation framework for the computation of the nonlinear moment is proposed, tailored for the WEC application. Finally, the use and capabilities of the framework are illustrated by means
of case studies, using different WEC systems, under a
variety of wave conditions.
| Item Type: |
Article
|
| Additional Information: |
Cite as: Faedo Nicolás, Dores Piuma, F. J., Giuseppe, G., & Ringwood, J. V. (2020). Nonlinear model reduction for wave energy systems: A moment-matching-based approach. Nonlinear Dynamics, 102(3), 1215-1237. doi:https://doi.org/10.1007/s11071-020-06028-0 |
| Keywords: |
Nonlinear model reduction; Moment-matching; Wave energy conversion; Nonlinear hydrodynamics; |
| Academic Unit: |
Faculty of Science and Engineering > Electronic Engineering |
| Item ID: |
15957 |
| Identification Number: |
https://doi.org/10.1007/s11071-020-06028-0 |
| Depositing User: |
Professor John Ringwood
|
| Date Deposited: |
16 May 2022 10:58 |
| Journal or Publication Title: |
Nonlinear Dynamics |
| Publisher: |
Proquest |
| 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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