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Report

Teaser, summary, work performed and final results

Periodic Reporting for period 1 - ICONN (European Industrial DoCtorate on Offshore WiNd and Wave ENergy)

Teaser

Summary

ICONN is a unique European Industrial Doctorate initiative to meet the current and future demand for highly skilled offshore wind and wave energy engineers by developing and advancing European capacity in the design, development and performance optimisation for Offshore Wind and Wave Energy installations. The initiative is strongly shaped by active participation from industries, and will develop and enhance European capacity in the offshore renewable energy area at a critical juncture in time when Europe strives to occupy a lead market position globally in this sector.
The ICONN EID will
i) provide state-of-the art training to Early Stage Researchers jointly with industries in the scientific and engineering disciplines of power take-off (PTO) and structural control, wave mechanics and hydrodynamics, CFD, sensing and system identification;
ii) advance expertise, and research capacity, in the techno-economic-environmental factors that impact on the reliability and operational efficiency of offshore renewable energy installations;
iii) instil business, management, entrepreneurship and innovation skills pertaining to offshore wind and combined wind-wave energy sector to encourage entrepreneurship and innovation;
iv) promote clearly defined scientific dissemination, public outreach and commercialisation/IP agendas.
The three scientific work packages, which scaffold the individual research activities, progress from addressing specific challenges and capability deficiencies that impede the effective and efficient deployment of offshore wind and wave infrastructures (floating systems and optimisation of power take-off (PTO) ) through to activi-ties that seek to create, and innovate in, new control algorithms and in operational efficiency domain (fatigue control, new algorithms for control of PTO).
The proposed training and skillset development contributes strongly to EC strategic research, training and in-novation strategies as established through the Europe 2020 strategy, Blue Energy, and in EC Innovation Union goals.

Work performed

\"The ICONN project is advancing strongly, with the recruited ESRs making solid advances on their research questions, and publication and dissemination opportunities being exploited.

The AAU team have three journal submissions arising out of ICONN under review, and they also organised two international ICONN related workshops and trainings (First Summer School and EWTEC workshop). The FPP team have produced three conference papers and four posters. The team in TCD organised two international ICONN workshops (1st International Workshop on Non-linear Hydrodynamics, Stochastic Dynamics and Control of Offshore Structures and a Symposium on Non-linear Hydrodynamics and Smooth Particle Hydrodynamics (SPH)). The TCD team also produced 6 conference publications in fields directly related to their ICONN interests and activities during this period.

As ICONN is an MSCA EID activity, it is important to also consider progress from the viewpoint of the beneficiaries and ESRs. FPP characterise their ESRâ€™s activities and achievements thus:
â€œPilar has continued to work hard to develop the numerical models of the FPP device. Her research achievements to date are captured in the three conference papers and four posters she has presented. In September 2017, Pilar moved to TCD to learn to use and develop the opensource aeroelastic code, FAST, and to couple it to a 6DoF hydrodynamic model of the semisubmersible part of Floating Power Plant\'s commercial device, P80. On her return to Denmark, Pilar will take some time to conclude the hydrodynamic research by writing at least one journal paper, after which she will spend the remainder of her PhD research time considering control of the full P80 device (platform, WECs and wind turbine) using the fully coupled (WAMIT-FAST) model, which she is currently developing in TCD.â€

The AAU ESRs research deals with stochastic constrained optimal control problems. Over the past year, two journal papers have been completed and submitted to Ocean Engineering. \"\"The basic idea of the first paper is to control the motion of the absorber by a modified LQG control where the constraints on the displacement and actuator force are approximately taken into consideration by counteracting the absorbed power in the objective quadratic functional. The results are validated by nonlinear programming. The second paper shows an analytical solution for optimal control of the power take-off of a single-degree of freedom heave point absorber with constraints on the control force. The indicated approach has been validated against numerical solutions obtained by nonlinear programming. A third paper has just been completed and submitted.\"\"

The TCD ESR has joined the project relatively recently and is focussing on WP3 of the project. The main aim is to develop generic multiobjective H-infinity based control algorithms (with validation) for heaving point absorbers, with a view to apply these to the SWIRL patented device WaveRAM. Two initial steps have identified â€“ (i) Hydrodynamic modelling of a point absorber with characteristics of WaveRAM (see attachment WRAM_model) and (ii) developing model predictive control algorithms (using a simple cylinder type device) to formulate and optimize controllers with maximum power generation, minimum use of control effort and safety limits as joint objectives (see attachment MPC_Point_Absorber). Progress has been made on both of these aspects in the last 5 months and a journal paper is expected to be submitted by the end of this year.

In summary,all ESRs are active and productive in their respective research areas, and publications and identified innovations have resulted from the efforts of the research teams.\"

Final results

\"The wave energy and offshore wind energy industries are at a critical juncture where future growth will be critically influenced by some key and fundamental scientific and technological developments. These developmental requirements form the basis of the research work planned in the ICONN EID.

The ICONN project proposes innovative aspects and highly original concepts in the R&D programme. These relate to the formulation and development of new computational algorithms to handle large fluid velocities in hydrodynamics; innovative robust control algorithms for optimal power take-off in wave energy including hydraulics, hydrodynamics and electrical aspects; consideration of all constraints from waves to wire; proposal of new advanced multi-objective control algorithms for stabilization of offshore wind turbine platforms; original concepts for designing for power efficiency and fatigue control; and use of time-frequency signal processing to formulate and develop new optimal control algorithms.

The ICONN project has been selected to participate in the Innovation Radar initiative. An element of this activity involves the identification, with an external expert, of extant and planned innovations that have arisen or are expected to arise from within the ICONN project. These represent one expression of progress beyond the state of the art. The Innovation Radar meeting documented three clear innovations that are resulting from ICONN activities, and two further potential innovations were also discussed. The three innovations are described as \"\"very innovative satisfying a well known market need\"\" where the market size for the innovation is valued at \"\">500M Euro\"\".

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