title: Stochastic control of inertial sea wave energy converter.
abstract: The ISWEC (inertial sea wave energy converter) is presented, its control problems are stated, and an optimal control strategy is introduced. As the aim of the device is energy conversion, the mean absorbed power by ISWEC is calculated for a plane 2D irregular sea state. The response of the WEC (wave energy converter) is driven by the sea-surface elevation, which is modeled by a stationary and homogeneous zero mean Gaussian stochastic process. System equations are linearized thus simplifying the numerical model of the device. The resulting response is obtained as the output of the coupled mechanic-hydrodynamic model of the device. A stochastic suboptimal controller, derived from optimal control theory, is defined and applied to ISWEC. Results of this approach have been compared with the ones obtained with a linear spring-damper controller, highlighting the capability to obtain a higher value of mean extracted power despite higher power peaks.
authors: Department of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
authors: Mattia
authors: 0000-0003-0101-6058
authors: M
authors: Raffero
authors: Environmental Hydraulics Institute "IH Cantabria", C/Isabel Torres 15, Santander, 39011 Cantabria, Spain.
authors: Michele
authors: 0000-0001-6554-3653
authors: M
authors: Martini
authors: Department of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
authors: Biagio
authors: 0000-0002-0718-2893
authors: B
authors: Passione
authors: Department of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
authors: Giuliana
authors: G
authors: Mattiazzo
authors: Department of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
authors: Ermanno
authors: E
authors: Giorcelli
authors: Department of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
authors: Giovanni
authors: 0000-0002-4793-202X
authors: G
authors: Bracco