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Comparison of Time domain Control Law for a Piston wave Absorber ArchiMer
Clement, Alain; Maisondieu, Christophe.
In this paper, we suggest two causal non-ideal approximations of this ideal non-causal controller. These time-domain absorbing relations differ in whether or not one knows a dominant frequency of the incident wave train to be absorbed. Their performances are compared to the absorption efficiency of the low frequency asymptotic Sommerfeld relation. Preliminary results of this study were already presented in Maisondieu and al. (1993).
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Ano: 1993 URL: http://archimer.ifremer.fr/doc/00203/31437/29833.pdf
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Wave groupiness and spectral bandwidth as relevant parameters for the performance assessment of wave energy converters ArchiMer
Saulnier, Jean-baptiste; Clement, Alain; Falcao, Antonio F. De O.; Pontes, Teresa; Prevosto, Marc; Ricci, Pierpaolo.
To date the estimation of long-term wave energy production at a given deployment site has commonly been limited to a consideration of the significant wave height H, and mean energy period T. This paper addresses the sensitivity of power production from wave energy converters to the wave groupiness and spectral bandwidth of sea states. Linear and non-linear systems are implemented to simulate the response of converters equipped with realistic power take-off devices in real sea states. It is shown in particular that, when the converters are not much sensitive to wave directionality, the bandwidth characteristic is appropriate to complete the set of overall wave parameters describing the sea state for the purpose of estimating wave energy production. (C) 2010...
Tipo: Text Palavras-chave: Wave groupiness; Spectral bandwidth; Sea states; Wave climate; Wave energy; Wave energy converters.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00031/14178/11467.pdf
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