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dc.contributor.authorGarcia Rosa, Paula Bastos
dc.contributor.authorMolinas Cabrera, Maria Marta
dc.contributor.authorFosso, Olav B
dc.date.accessioned2020-03-30T07:36:58Z
dc.date.available2020-03-30T07:36:58Z
dc.date.created2019-12-17T13:57:20Z
dc.date.issued2019
dc.identifier.citationProceedings og European Wave and Tidal Energy Conference. 2019, 1275 (1), .en_US
dc.identifier.issn2309-1983
dc.identifier.urihttps://hdl.handle.net/11250/2649282
dc.description.abstractA great improvement in the absorption of energy of a wave energy converter (WEC) is obtained with a time-varying power take-off (PTO) damping over a constant damping. In a passive control scheme based on the Hilbert-Huang transform (HHT), the PTO damping is time-varying and tuned to the instantaneous frequency of the wave excitation force. The HHT method relies on the use of the empirical mode decomposition (EMD) method to decompose the wave signal into a number of components (IMFs) from the highest to the lowest frequency component. However, the decomposition process is not always perfect and may result in mode mixing, where an IMF will consist of signals of widely disparate frequency scales, or different IMFs will consist of signals with similar frequency scales. Mode mixing can be caused by intermittent/noisy signals, and by specific amplitude and frequency relations of the original modes in the signal. The aim of this paper is to extend the studies on the use of the HHT for WEC tuning purposes by revealing how the EMD mode mixing problem affects the WEC performance. A comprehensive study using firstly synthetic two-tone waves (i.e., superposition of two sinusoidal waves) is performed. Then, the observations from the two-tone studies are used to further improve the energy absorbed by WECs using the HHT in real ocean wave scenarios resembling the analytic scenario.en_US
dc.language.isoengen_US
dc.publisherEWTECen_US
dc.titleDiscussion on the mode mixing in wave energy control systems using the Hilbert-Huang transformen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionacceptedVersionen_US
dc.subject.nsiVDP::Elektrotekniske fag: 540en_US
dc.subject.nsiVDP::Electro-technical sciences: 540en_US
dc.source.pagenumber6en_US
dc.source.volume1275en_US
dc.source.journalProceedings og European Wave and Tidal Energy Conferenceen_US
dc.source.issue1en_US
dc.identifier.cristin1762010
dc.description.localcode© 2019. This is the authors' accepted and refereed manuscript to the article. The final authenticated version is available online at: https://proceedings.ewtec.org/ewtec-proceedings-portal/en_US
cristin.unitcode194,63,20,0
cristin.unitcode194,63,25,0
cristin.unitnameInstitutt for elkraftteknikk
cristin.unitnameInstitutt for teknisk kybernetikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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