TY - JOUR AU - Gonzalez-Esculpi, Alejandro AU - Verde, Cristina AU - Maya-Ortiz, Paul TI - Nonlinear impedance matching control for a submerged wave energy converter JF - IET CONTROL THEORY & APPLICATIONS J2 - IET CONTR THEORY APPL PY - 2023 PG - 14 SN - 1751-8644 DO - 10.1049/cth2.12565 UR - https://m2.mtmt.hu/api/publication/34321707 ID - 34321707 AB - The impedance matching control, also known as approximate complex conjugate control (ACC), is one of the main strategies for improving the capture of energy by point absorber wave energy converters. Such a strategy shapes the mechanical impedance related to the floater dynamics via the control law. Since the traditional ACC is given by a linear control law, this work proposes a generalization denoted as nonlinear complex conjugate control (NCC) that considers the presence of nonlinear viscous damping in addition to the usual linear damping and stiffness. The energy maximization conditions for the proposed NCC are derived in the frequency domain through the describing function method. These conditions show that the ACC is a special case of the NCC when the total damping on the floater is approximated as a linear function of its velocity. From numerical simulations of a point absorber wave energy converters with nonlinear damping, which is based on the Archimedes wave swing prototype, it is shown that the NCC provides greater energy conversion than the ACC, as well as a robust performance in the presence of variations of the damping coefficient and the excitation force peak frequency.The paper proposes a variation of the impedance matching control, also known as approximate complex conjugate (ACC) strategy. The proposed variation is denoted here as nonlinear complex conjugate (NCC) control since it includes a nonlinear damping term in addition to the usual ones, which are related to the linear stiffness and the linear damping.image LA - English DB - MTMT ER - TY - JOUR AU - Gonzalez-Esculpi, Alejandro AU - Verde, Cristina AU - Maya-Ortiz, Paul TI - Nonlinear servocompensator for fault-tolerant control of a wave energy converter JF - JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS J2 - J FRANKLIN I VL - 360 PY - 2023 IS - 12 SP - 8339 EP - 8362 PG - 24 SN - 0016-0032 DO - 10.1016/j.jfranklin.2023.05.018 UR - https://m2.mtmt.hu/api/publication/34321708 ID - 34321708 AB - This paper addresses the problem of controlling a wave energy converter (WEC) susceptible to faults in its braking subsystems, characterized through nonlinear damping. By considering the necessity of robust trajectory tracking related to the sea waves for maximizing the converted energy, one aims to preserve such a trajectory in the presence of faults to avoid physical damage in the structure of the WEC. To achieve this objective, this paper proposes a fault-tolerant control (FTC) that combines two systems: (i) a novel nonlinear servocompensator (NSC) and (ii) a fault diagnosis subsystem (FD). The NSC is based on a variable structure control that generalizes the internal model principle for robust tracking. The reference signal is computed from real-time measurements of the irregular sea waves. The FD subsystem estimates the faults related to the wear of the brakes via an unknown input observer. Due to its independent performance from the FD, the global scheme can be considered as a passive FTC. By considering the faulty model of a WEC based on the Archimedes wave swing prototype, theoretical formulation and the convergence proof are given for the NSC and the FD. The performance of the proposed design is verified with numerical simulations of the WEC with the incidence of irregular sea waves under different fault scenarios in the upper and lower brakes. & COPY; 2023 The Franklin Institute. Published by Elsevier Inc. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Luan, Feng AU - Wang, Zhenchun TI - Double-layer model predictive control for wave energy converters with model mismatch JF - ENERGY REPORTS J2 - ENERGY REP VL - 9 PY - 2023 SP - 2463 EP - 2472 PG - 10 SN - 2352-4847 DO - 10.1016/j.egyr.2023.01.051 UR - https://m2.mtmt.hu/api/publication/33932215 ID - 33932215 AB - To reduce the impact of the model mismatch on the conversion efficiency of wave energy converters (WECs), a double-layer model predictive control (DMPC) method is proposed. Two closely related control layers are included in the DMPC method: (1) The first control layer is compensation control, which deals with the model mismatch by using the prediction data from the second layer. (2) The second layer aims to maximize energy output while taking the compensation value from the first layer into consideration. The sum of the compensation value obtained at the first layer and the control value obtained at the second layer refers to the final control input for the real system. The simulation results demonstrate that the proposed method effectively reduces the impact of the model mismatch and complies with control input and float's position limitations.(c) 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). LA - English DB - MTMT ER - TY - JOUR AU - Pasta, Edoardo AU - Faedo, Nicolas AU - Mattiazzo, Giuliana AU - Ringwood, John V. TI - Towards data-driven and data-based control of wave energy systems: Classification, overview, and critical assessment JF - RENEWABLE & SUSTAINABLE ENERGY REVIEWS J2 - RENEW SUST ENERG REV VL - 188 PY - 2023 PG - 20 SN - 1364-0321 DO - 10.1016/j.rser.2023.113877 UR - https://m2.mtmt.hu/api/publication/34635492 ID - 34635492 LA - English DB - MTMT ER - TY - JOUR AU - Ringwood, John V AU - Zhan, Siyuan AU - Faedo, Nicolas TI - Empowering wave energy with control technology: Possibilities and pitfalls JF - ANNUAL REVIEWS IN CONTROL J2 - ANNU REV CONTROL VL - 55 PY - 2023 SP - 18 EP - 44 PG - 27 SN - 1367-5788 DO - 10.1016/j.arcontrol.2023.04.004 UR - https://m2.mtmt.hu/api/publication/34321709 ID - 34321709 AB - With an increasing focus on climate action and energy security, an appropriate mix of renewable energy technologies is imperative. Despite having considerable global potential, wave energy has still not reached a state of maturity or economic competitiveness to have made an impact. Challenges include the high capital and operational costs associated with deployment in the harsh ocean environment, so it is imperative that the full energy harnessing capacity of wave energy devices, and arrays of devices in farms, is realised. To this end, control technology has an important role to play in maximising power capture, while ensuring that physical system constraints are respected, and control actions do not adversely affect device lifetime. Within the gamut of control technology, a variety of tools can be brought to bear on the wave energy control problem, including various control strategies (optimal, robust, nonlinear, etc.), data-based model identification, estimation, and forecasting. However, the wave energy problem displays a number of unique features which challenge the traditional application of these techniques, while also presenting a number of control 'paradoxes'. This review articulates the important control-related characteristics of the wave energy control problem, provides a survey of currently applied control and control-related techniques, and gives some perspectives on the outstanding challenges and future possibilities. The emerging area of control co-design, which is especially relevant to the relatively immature area of wave energy system design, is also covered. LA - English DB - MTMT ER - TY - JOUR AU - Zhan, Siyuan AU - Stansby, Peter AU - Liao, Zhijing AU - Li, Guang TI - A Fast Model Predictive Control Framework for Multi-Float and Multi-Mode-Motion Wave Energy Converters JF - IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY J2 - IEEE T CONTR SYST T VL - 31 PY - 2023 IS - 3 SP - 1443 EP - 1450 PG - 8 SN - 1063-6536 DO - 10.1109/TCST.2022.3216081 UR - https://m2.mtmt.hu/api/publication/33932214 ID - 33932214 AB - Recently, multi-float and multi-mode-motion wave energy converters (M-WECs) have been developed to improve energy conversion capability. Although model predictive control (MPC) can be very effective to solve the constrained energy maximization control problem of point absorber WECs, the increased complexity of the M-WEC hydrodynamics can bring significant challenges due to computational demand. This brief proposes a novel computational-efficient fast MPC (FMPC) design method for the M-WECs requiring complex linear hydrodynamic models. The controller design objective is to maximize the energy conversion with some available wave forecasting information and to satisfy state and control input constraints to ensure safe operation. The main advantage of the proposed FMPC is the reduced computational burden with a negligible impact on performance. A demonstrative numerical simulation based on a 1:50 laboratory-scale M-WEC design, M4, for which linear hydrodynamics has been verified experimentally, is presented to verify the efficacy of the proposed control method in terms of both computational load and energy output. LA - English DB - MTMT ER - TY - JOUR AU - Guo, Bingyong AU - Wang, Tianyao AU - Jin, Siya AU - Duan, Shunli AU - Yang, Kunde AU - Zhao, Yaming TI - A Review of Point Absorber Wave Energy Converters JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 10 PY - 2022 IS - 10 SP - 1534 PG - 37 SN - 2077-1312 DO - 10.3390/jmse10101534 UR - https://m2.mtmt.hu/api/publication/33190056 ID - 33190056 AB - There are more than thousands of concepts for harvesting wave energy, and wave energy converters (WECs) are diverse in operating principles, design geometries and deployment manners, leading to misconvergence in WEC technologies. Among numerous WEC devices, the point absorber wave energy converter (PAWEC) concept is one of the simplest, most broad-based and most promising concepts that has been investigated intensively all over the world. However, there are only a few reviews focusing on PAWECs, and the dynamical advancement of PAWECs merits an up-to-date review. This review aims to provide a critical overview of the state of the art in PAWEC development, comparing and contrasting various PAWEC devices and discussing recent research and development efforts and perspectives of PAWECs in terms of prototyping, hydrodynamic modelling, power take-off mechanism and control. LA - English DB - MTMT ER - TY - JOUR AU - Korukonda, Meher Preetam AU - Prakash, Ravi AU - Samanta, Suvendu AU - Behera, Laxmidhar TI - Model Free Adaptive Neural Controller for Standalone Photovoltaic Distributed Generation Systems With Disturbances JF - IEEE TRANSACTIONS ON SUSTAINABLE ENERGY J2 - IEEE T SUSTAIN ENERGY VL - 13 PY - 2022 IS - 2 SP - 653 EP - 667 PG - 15 SN - 1949-3029 DO - 10.1109/TSTE.2021.3123184 UR - https://m2.mtmt.hu/api/publication/33399757 ID - 33399757 AB - Unknown system parameters and varying disturbances are detrimental to the stability of low-inertia systems like standalone photovoltaic distributed generation systems (SPVDG). In this paper, a model-free adaptive neural controller (ANC) is proposed for the maximum power point tracking (MPPT) and grid voltage control of an SPVDG whose system model is unknown and subjected to varying disturbances. This helps in making the system more robust to sensor failures. The neural network weight update laws of the controller are derived using the Lyapunov stability criterion. It is shown that the proposed controller ensures the uniformly ultimately boundedness (UUB) of all states of the resulting closed-loop system. The performance of the proposed controller is evaluated in simulations against two other state-of-the-art controllers in the presence of disturbance and parameter intermittencies. LA - English DB - MTMT ER - TY - JOUR AU - Guo, B. AU - Ringwood, J.V. TI - Geometric optimisation of wave energy conversion devices: A survey JF - APPLIED ENERGY J2 - APPL ENERG VL - 297 PY - 2021 SN - 0306-2619 DO - 10.1016/j.apenergy.2021.117100 UR - https://m2.mtmt.hu/api/publication/32788732 ID - 32788732 N1 - Cited By :12 Export Date: 21 April 2022 CODEN: APEND Correspondence Address: Ringwood, J.V.; Centre for Ocean Energy Research, Maynooth, Co. Kildare, Ireland; email: John.Ringwood@mu.ie LA - English DB - MTMT ER - TY - JOUR AU - Guo, Bingyong AU - Ringwood, John V. TI - A review of wave energy technology from a research and commercial perspective JF - IET RENEWABLE POWER GENERATION J2 - IET RENEW POWER GEN PY - 2021 PG - 26 SN - 1752-1416 DO - 10.1049/rpg2.12302 UR - https://m2.mtmt.hu/api/publication/32404388 ID - 32404388 AB - Although wave energy prototypes have been proposed for more than 100 years, they have still not reached full commercialisation. The reasons for this are varied, but include the diversity of device operating principles, the variety of onshore/nearshore/offshore deployment possibilities, the diversity of the wave climate at various potential wave energy sites, and the consequent lack of convergence in technology and consensus. This distributed effort has, in turn, lead to a slow rate of progression up the learning curve, with a significant number of wave energy company liquidations and technical setbacks dampening investor confidence. Although a number of reviews on wave energy technology are already in the published literature, such a dynamic environment merits an up-to-date analysis and this review examines the wave energy landscape from a technological, research and commercial perspective. LA - English DB - MTMT ER - TY - JOUR AU - Li, Qiaofeng AU - Mi, Jia AU - Li, Xiaofan AU - Chen, Shuo AU - Jiang, Boxi AU - Zuo, Lei TI - A self-floating oscillating surge wave energy converter JF - ENERGY J2 - ENERGY VL - 230 PY - 2021 PG - 13 SN - 0360-5442 DO - 10.1016/j.energy.2021.120668 UR - https://m2.mtmt.hu/api/publication/32404393 ID - 32404393 AB - This paper proposes a new conceptual configuration for oscillating surge wave energy converters. The concept is a self-floating device consisting of two vertical flaps with a common hinge and an averaged density equal to that of water. The two flaps will oscillate in opposite directions when driven by incident waves. Kinetic energy will be extracted from the relative speed between the two flaps by a power takeoff embedded at the hinge. Numerical studies reveal that the self-floating device has a smaller resonant period and optimal power take-off damping compared with a bottom-hinged floating device of the same overall dimensions. As long as the power take-off damping is appropriately tuned, the opposite-rotation mechanism is valid in both regular and irregular waves, and no matter whether the hinge is fixed or connected with mooring lines. With the self-floating feature and opposite-rotation mechanism, the proposed concept can potentially benefit deep ocean applications by exerting a significantly less reaction loading on mooring lines and eliminating the need for a supporting frame to house the power take-off. The influence of various design parameters such as flap dimensions, submerged depth, incident wave direction, and water depth is also analyzed for a comprehensive evaluation of the proposed concept.(c) 2021 Elsevier Ltd. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Li, Qiaofeng AU - Li, Xiaofan AU - Mi, Jia AU - Jiang, Boxi AU - Chen, Shuo AU - Zuo, Lei TI - Tunable Wave Energy Converter Using Variable Inertia Flywheel JF - IEEE TRANSACTIONS ON SUSTAINABLE ENERGY J2 - IEEE T SUSTAIN ENERGY VL - 12 PY - 2021 IS - 2 SP - 1265 EP - 1274 PG - 10 SN - 1949-3029 DO - 10.1109/TSTE.2020.3041664 UR - https://m2.mtmt.hu/api/publication/32404389 ID - 32404389 AB - Axisymmetric heaving point absorbers are popular wave energy converters because of their easy deployment and insensitivity to incident wave directions. These devices are designed ideally to resonate with the incident wave to achieve high power output. However, as the device resonant frequency deviates from the dominant frequency of ever-changing irregular waves, the performance drops drastically. To solve this problem and as a complement to existing measures, we propose a mechanism, named variable inertia flywheel, to directly manipulate the equivalent mass of the point absorber, thus altering the system resonance frequency and power absorption bandwidth. We use a flywheel with symmetrically placed mass spring dampers in a ballscrew-based power take-off system. With its variable inertia and mass amplification effect, we can economically and dynamically adapt the system equivalent mass and corresponding parameters with small mass spring dampers. Apart from the passive configuration, we also propose the semi-active and active configurations to further enhance the performance and broaden the functionality scope of the proposed power take-off system. Numerical studies have revealed the dynamics of variable inertia flywheel, and have validated its adaptivity to varying wave conditions and its potential for increasing power output of point absorbers in both regular and irregular waves. LA - English DB - MTMT ER - TY - CHAP AU - Tiwari, Dhananjay AU - Banavar, Ravi N. AU - Maithripala, D. H. S. TI - Geometric Modelling and Energy Optimisation in a Heaving-Point Absorber Wave Energy Converter T2 - 2021 29th Mediterranean Conference on Control and Automation (MED) PB - IEEE CY - Piscataway (NJ) SN - 9781665422581 PY - 2021 SP - 967 EP - 972 PG - 6 DO - 10.1109/MED51440.2021.9480198 UR - https://m2.mtmt.hu/api/publication/33399755 ID - 33399755 N1 - ISSN:2325-369X AB - This paper describes a model for a heaving-point absorber wave energy converter (WEC). A semi-submerged, spherical buoy with an internally suspended pendulum is used to study the constrained motion of the WEC. The initial aim is to derive the mathematical model for the motion of the WEC. In the current study, translation motion of the spherical buoy is constrained at the bottom-most point, and the link of the pendulum is attached internally at a diametrically opposite end. The rotational dynamics of the two-body system is derived on a configurational manifold using geometric techniques and validated using MATLAB simulations. Later on, the attempt is to maximize the total oscillation energy stored in the pendulum for the periodic forces acting at specific points on the sphere. The optimization is achieved by using the local coordinates of the configurational manifold on which the system moves. It is observed that the current method is computationally inefficient. Hence this work will be extended at later stages in designing a more efficient geometric-structure preserving optimal control technique. Our study is a first attempt to mimic the impact of waves on these spheres coupled with a pendulum and arrive at preliminary results on optimal energy extraction before proceeding to more realistic and complex scenarios. LA - English DB - MTMT ER - TY - JOUR AU - Wang, Zhenchun AU - Luan, Feng AU - Wang, Nianguo TI - An improved model predictive control method for wave energy converter with sliding mode control JF - OCEAN ENGINEERING J2 - OCEAN ENG VL - 240 PY - 2021 PG - 11 SN - 0029-8018 DO - 10.1016/j.oceaneng.2021.109881 UR - https://m2.mtmt.hu/api/publication/32746811 ID - 32746811 LA - English DB - MTMT ER - TY - JOUR AU - Windt, Christian AU - Faedo, Nicolas AU - Penalba, Markel AU - Dias, Frederic AU - Ringwood, John V. TI - Reactive control of wave energy devices-the modelling paradox JF - APPLIED OCEAN RESEARCH J2 - APPL OCEAN RES VL - 109 PY - 2021 PG - 15 SN - 0141-1187 DO - 10.1016/j.apor.2021.102574 UR - https://m2.mtmt.hu/api/publication/32404391 ID - 32404391 AB - The implementation of energy maximising control systems (EMCSs) in wave energy converter (WEC) devices is an important step towards commercially viable operation of WECs. During the design stage of such EMCSs, linear hydrodynamic models are commonly used and are, in fact, the most viable option due to the real?time computational requirements of optimisation routines associated with energy-maximising optimal control tech-niques. However, the objective function of EMCSs, i.e. maximising the generated power by exaggerating WEC motion, inherently violates the underlying assumption of the linear hydrodynamic control design models, i.e. small amplitude device motion (compared to the device dimensions). Consequently, the linear models, used as a basis for EMCSs, in fact conspire to violate the very assumption upon which they were built -hence leading to a modelling paradox. It is important to evaluate WEC controllers in realistic physical or numerical environments, to gain knowledge of the disparity between the performance prediction from the EMCS design and performance evaluation models. This paper presents a comprehensive assessment of the performance prediction by a linear and non?linear hydrodynamic model of three different EMCSs, implemented in two different WEC structures, in an attempt to quantify the severity of this modelling disparity, or paradox. LA - English DB - MTMT ER - TY - JOUR AU - Davidson, Joshua Patrick AU - Kalmár-Nagy, Tamás TI - A Real-Time Detection System for the Onset of Parametric Resonance in Wave Energy Converters JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 8 PY - 2020 IS - 10 PG - 23 SN - 2077-1312 DO - 10.3390/jmse8100819 UR - https://m2.mtmt.hu/api/publication/31658797 ID - 31658797 LA - English DB - MTMT ER - TY - JOUR AU - Davidson, Joshua Patrick AU - Costello, Ronan TI - Efficient Nonlinear Hydrodynamic Models for Wave Energy Converter Design-A Scoping Study JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 8 PY - 2020 IS - 1 PG - 65 SN - 2077-1312 DO - 10.3390/jmse8010035 UR - https://m2.mtmt.hu/api/publication/31491403 ID - 31491403 AB - This review focuses on the most suitable form of hydrodynamic modeling for the next generation wave energy converter (WEC) design tools. To design and optimize a WEC, it is estimated that several million hours of operation must be simulated, perhaps one million hours of WEC simulation per year of the R&D program. This level of coverage is possible with linear potential flow (LPF) models, but the fidelity of the physics included is not adequate. Conversely, while Reynolds averaged Navier-Stokes (RANS) type computational fluid dynamics (CFD) solvers provide a high fidelity representation of the physics, the increased computational burden of these models renders the required amount of simulations infeasible. To scope the fast, high fidelity options, the present literature review aims to focus on what CFD theories exist intermediate to LPF and RANS as well as other modeling options that are computationally fast while retaining higher fidelity than LPF. LA - English DB - MTMT ER - TY - JOUR AU - Giorgi, Giuseppe AU - Davidson, Joshua Patrick AU - Habib, Giuseppe AU - Bracco, Giovanni AU - Mattiazzo, Giuliana AU - Kalmár-Nagy, Tamás TI - Nonlinear Dynamic and Kinematic Model of a Spar-Buoy: Parametric Resonance and Yaw Numerical Instability JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 8 PY - 2020 IS - 7 PG - 17 SN - 2077-1312 DO - 10.3390/jmse8070504 UR - https://m2.mtmt.hu/api/publication/31383676 ID - 31383676 LA - English DB - MTMT ER - TY - JOUR AU - Lu, Kai-Hung AU - Hong, Chih-Ming AU - Han, Zhigang AU - Yu, Lei TI - New Intelligent Control Strategy Hybrid Grey-RCMAC Algorithm for Ocean Wave Power Generation Systems JF - ENERGIES J2 - ENERGIES VL - 13 PY - 2020 IS - 1 PG - 21 SN - 1996-1073 DO - 10.3390/en13010241 UR - https://m2.mtmt.hu/api/publication/31491402 ID - 31491402 AB - In this article, the characteristics of the wave energy converter are considered and a novel dynamic controller (NDC) for a permanent magnet synchronous generator (PMSG) is proposed for Wells turbine applications. The proposed NDC includes a recursive cerebellum model articulation controller (RCMAC) with a grey predictor and innovative particle swarm optimization (IPSO). IPSO is developed to adjust the learning speed and improve learning capability. Based on the supervised learning method, online adjustment law of RCMAC parameters is derived to ensure the system's stability. The NDC scheme is designed to maintain a supply-demand balance between intermittent power generation and grid power supply. The proposed NDC exhibits an improved power regulation and dynamic performance of the wave energy system under various operation conditions. Furthermore, better results are obtained when the RCMAC is used with the grey predictive model method. LA - English DB - MTMT ER - TY - JOUR AU - Sun, Xiaodong AU - Wu, Minkai AU - Yang, Zebin AU - Lei, Gang AU - Guo, Youguang TI - High-performance control for a permanent-magnet linear synchronous generator using state feedback control scheme plus grey wolf optimisation JF - IET ELECTRIC POWER APPLICATIONS J2 - IET ELECTR POWER APP VL - 14 PY - 2020 IS - 5 SP - 771 EP - 780 PG - 10 SN - 1751-8660 DO - 10.1049/iet-epa.2019.0383 UR - https://m2.mtmt.hu/api/publication/31491405 ID - 31491405 AB - This study proposes an optimal control scheme for a permanent-magnet linear synchronous generator (PMLSG) using the state feedback control (SFC) method plus the grey wolf optimisation (GWO) algorithm. First, A novel state-space model of linear PMLSG is established in order to obtain desired dynamics and enough power when used for the smooth wave energy. Second, the GWO algorithm is adopted to acquire weighting matrices Q and R in the process of optimising linear quadratic regulator (LQR). What is more, a penalty term is brought into the fitness index to reduce the overstrike of output voltage and keep the rate of work more stable. Finally, optimal LQR-based SFC with and without penalty term and proportional-integral (PI) controllers are compared both in simulations and in experiments. Results clearly prove that the proposed optimal control strategy performs a better response when compared to other strategies. LA - English DB - MTMT ER - TY - JOUR AU - Wu, Jinming TI - On Power-Absorption Degrees of Freedom for Point Absorber Wave Energy Converters JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 8 PY - 2020 IS - 9 PG - 20 SN - 2077-1312 DO - 10.3390/jmse8090711 UR - https://m2.mtmt.hu/api/publication/31708487 ID - 31708487 AB - Point absorbers are extensively employed in wave energy conversion. In this work, we studied the point absorber with the buoy of a vertical cylindrical shape. Wave power absorption is obtained through the relative motion between the buoy and an internal mass. Three power-absorption degrees of freedom are investigated, i.e., surge, heave, and pitch, together with the influence of wave compliance of the buoy. Results show that, to absorb more power, the internal mass should be as large as possible for power absorption in translational degrees of freedom, i.e., surge and heave. The total rotational inertia should be as large as possible and the center of mass should be as low as possible for power absorption in pitch. Wave compliance of the buoy slightly enhances the power absorption in surge, but significantly weakens the power absorption in pitch. Surge is the best degree of freedom for power absorption owing to the highest efficiency, indicated by the largest capture width ratio. The simple resistive control is found to be adequate for wave power absorption of the self-reacting point absorber. LA - English DB - MTMT ER - TY - JOUR AU - Zhang, Yao AU - Zhan, Siyuan AU - Li, Guang TI - Model Predictive Control of Wave Energy Converters With Prediction Error Tolerance JF - IFAC PAPERSONLINE J2 - IFACOL VL - 53 PY - 2020 IS - 2 SP - 12289 EP - 12294 PG - 6 SN - 2405-8963 DO - 10.1016/j.ifacol.2020.12.1169 UR - https://m2.mtmt.hu/api/publication/32746812 ID - 32746812 LA - English DB - MTMT ER - TY - JOUR AU - Zhan, Siyuan AU - Na, Jing AU - Li, Guang AU - Wang, Bin TI - Adaptive Model Predictive Control of Wave Energy Converters JF - IEEE TRANSACTIONS ON SUSTAINABLE ENERGY J2 - IEEE T SUSTAIN ENERGY VL - 11 PY - 2020 IS - 1 SP - 229 EP - 238 PG - 10 SN - 1949-3029 DO - 10.1109/TSTE.2018.2889767 UR - https://m2.mtmt.hu/api/publication/31014948 ID - 31014948 LA - English DB - MTMT ER - TY - GEN AU - Davidson, Joshua Patrick AU - Karimov, Mirlan AU - Szelechman, Adam AU - Windt, Christian AU - Ringwood, John V TI - Dynamic mesh motion in OpenFOAM for wave energy converter simulation PY - 2019 PG - 8 UR - https://m2.mtmt.hu/api/publication/31010028 ID - 31010028 N1 - Egyéb konferenciaközlemény lenne, és Közlemény:31833854 lenne a befoglalója, de a https://sourceforge.net/projects/openfoam-extend/files/OpenFOAM_Workshops/ oldal tanúsága szerint a befoglaló nem jelent meg. (Fülöp Tamás BME GPK admin5) LA - English DB - MTMT ER - TY - CHAP AU - Garcia-Violini, Demian AU - Ringwood, John V. ED - IEEE, null TI - Robust Control of Wave Energy Converters Using Spectral and Pseudospectral Methods: A Case Study T2 - 2019 American Control Conference, ACC 2019 PB - IEEE CY - Piscataway (NJ) SN - 9781538679265 T3 - Proceedings of the American Control Conference, ISSN 0743-1619 ; 2019-July. PY - 2019 SP - 4779 EP - 4784 PG - 6 DO - 10.23919/ACC.2019.8815297 UR - https://m2.mtmt.hu/api/publication/31014950 ID - 31014950 LA - English DB - MTMT ER - TY - JOUR AU - Garcia-Violini, Demián AU - Ringwood, John V. TI - Energy maximising robust control for spectral and pseudospectral methods with application to wave energy systems JF - INTERNATIONAL JOURNAL OF CONTROL J2 - INT J CONTROL VL - 92 PY - 2019 SP - 1 EP - 12 PG - 12 SN - 0020-7179 DO - 10.1080/00207179.2019.1632491 UR - https://m2.mtmt.hu/api/publication/31014952 ID - 31014952 LA - English DB - MTMT ER - TY - JOUR AU - Na, Jing AU - Wang, Bin AU - Li, Guang AU - Zhan, Siyuan AU - He, Wei TI - Nonlinear Constrained Optimal Control of Wave Energy Converters With Adaptive Dynamic Programming JF - IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS J2 - IEEE T IND ELECTRON VL - 66 PY - 2019 IS - 10 SP - 7904 EP - 7915 PG - 12 SN - 0278-0046 DO - 10.1109/TIE.2018.2880728 UR - https://m2.mtmt.hu/api/publication/31014953 ID - 31014953 LA - English DB - MTMT ER - TY - JOUR AU - Na, Jing AU - Li, Guang AU - Wang, Bin AU - Herrmann, Guido AU - Zhan, Siyuan TI - Robust Optimal Control of Wave Energy Converters Based on Adaptive Dynamic Programming JF - IEEE TRANSACTIONS ON SUSTAINABLE ENERGY J2 - IEEE T SUSTAIN ENERGY VL - 10 PY - 2019 IS - 2 SP - 961 EP - 970 PG - 10 SN - 1949-3029 DO - 10.1109/TSTE.2018.2856802 UR - https://m2.mtmt.hu/api/publication/31014947 ID - 31014947 LA - English DB - MTMT ER - TY - JOUR AU - Wu, Guoheng AU - Lu, Zhongyue AU - Luo, Zirong AU - Shang, Jianzhong AU - Sun, Chongfei AU - Zhu, Yiming TI - Experimental Analysis of a Novel Adaptively Counter-Rotating Wave Energy Converter for Powering Drifters JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 7 PY - 2019 IS - 6 SP - 171 SN - 2077-1312 DO - 10.3390/jmse7060171 UR - https://m2.mtmt.hu/api/publication/31014951 ID - 31014951 LA - English DB - MTMT ER - TY - CHAP AU - Zhang, Yao AU - Li, Guang AU - Zeng, Tianyi ED - IEEE, null TI - Wave Excitation Force Estimation for Wave Energy Converters Using Adaptive Sliding Mode Observer T2 - 2019 American Control Conference, ACC 2019 PB - IEEE CY - Piscataway (NJ) SN - 9781538679265 T3 - Proceedings of the American Control Conference, ISSN 0743-1619 ; 2019-July. PY - 2019 SP - 4803 EP - 4808 PG - 6 DO - 10.23919/ACC.2019.8815196 UR - https://m2.mtmt.hu/api/publication/31014955 ID - 31014955 LA - English DB - MTMT ER - TY - JOUR AU - Guo, Bingyong AU - Patton, Ron J. AU - Jin, Siya AU - Lan, Jianglin TI - Numerical and experimental studies of excitation force approximation for wave energy conversion JF - RENEWABLE ENERGY J2 - RENEW ENERGY VL - 125 PY - 2018 SP - 877 EP - 889 PG - 13 SN - 0960-1481 DO - 10.1016/j.renene.2018.03.007 UR - https://m2.mtmt.hu/api/publication/31833539 ID - 31833539 LA - English DB - MTMT ER - TY - JOUR AU - Penalba, M. AU - Davidson, Joshua Patrick AU - Windt, C. AU - Ringwood, J.V. TI - A high-fidelity wave-to-wire simulation platform for wave energy converters: Coupled numerical wave tank and power take-off models JF - APPLIED ENERGY J2 - APPL ENERG VL - 226 PY - 2018 SP - 655 EP - 669 PG - 15 SN - 0306-2619 DO - 10.1016/j.apenergy.2018.06.008 UR - https://m2.mtmt.hu/api/publication/30353895 ID - 30353895 LA - English DB - MTMT ER -