2011
DOI: 10.1016/j.renene.2010.11.013
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Modelling, control and Pontryagin Maximum Principle for a two-body wave energy device

Abstract: Frequency domain analysis is applied to a wave energy device composed by two coaxial A time domain model is also developed for the device. A non-linear power take-off mechanism configuration, consisting in a hydraulic circuit with low-pressure and high-pressure gas accumulators, is devised. Time averaged absorbed power is maximized in terms of characteristic mechanism parameter. A sub-optimal method of phase control by latching is applied to the device in order to improve its performance. Analytical developmen… Show more

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Cited by 48 publications
(40 citation statements)
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“…This have led to the idea of a point absorber system with two bodies, one acting as a surface buoy, extracting energy, while the lower is passive and adds the desired inertia. [10][11][12][13] It is important to have the two bodies a sufficient distance apart so as not to get destructive interference. All tests on the two body system (TBS) thus far have shown promising results on a theoretical level with a 60% absorption in irregular waves and a significant decrease in optimal load damping.…”
Section: Introductionmentioning
confidence: 99%
“…This have led to the idea of a point absorber system with two bodies, one acting as a surface buoy, extracting energy, while the lower is passive and adds the desired inertia. [10][11][12][13] It is important to have the two bodies a sufficient distance apart so as not to get destructive interference. All tests on the two body system (TBS) thus far have shown promising results on a theoretical level with a 60% absorption in irregular waves and a significant decrease in optimal load damping.…”
Section: Introductionmentioning
confidence: 99%
“…Так как уравнение записано для прираще-ний, все начальные значения переменных равны нулю, что удовлетворяет требованиям для передаточной функций [7][8][9].…”
Section: также запишем векторы управления и возмущенияunclassified
“…This is a very powerful approach for most situations, yielding accurate results in many cases with small computational time. Works such as the two-body heave converter from Andres et al, the SEAREV from Babarit et al, and heaving WEC are all examples of recent successful use of linear time-domain approach for WEC design [15][16][17][18][19]. However, the description of the problem through Fourier Transform makes it impossible to incorporate nonlinear (potential flow wave-dependent) effects into these models.…”
Section: Introductionmentioning
confidence: 99%