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- Li et al.
The modeling and control of tethered undersea kites for power generation are discussed in this paper. In the first part, we apply the added mass model to underwater kite systems. In the second part, the stability of undersea kite systems is analyzed using two frameworks. The dissipative property of thehydrodynamic forceis provided first. Based on this property, the input to state stability of…
- Reed et al.
This paper examines the control of an autonomous underwater vehicle (AUV) with a deployable energy-harvesting kite for oceanographic observation and surveillance. The proposed design and control strategies specifically address objectives of achieving high-payload, long-endurance AUV operation through the deployment of an energy-harvesting kite while the AUV is anchored to the seabed, followed…
- Mademlis et al.
The tethered-undersea-kite (TUSK) represents a new electric power generation concept for harvesting energy from tidal currents, with higher power density compared to traditional static tidal turbines. However, the power and rotating speed of the turbine fluctuate periodically depending on the kite's motion in the sea creating an additional challenge for the speed control of the generator…
- Mademlis et al.
Tethered-UnderSea-Kites (TUSK) represent a new electric power generation concept for harvesting the energy of the tidal current. A TUSK system has the advantage of increasing the extracted power from the tidal flow compared to a traditional static tidal turbine of the same size. This paper deals with the modeling and control of a TUSK tidal generator in order to estimate the energy production…
- Siddiqui et al.
This paper presents a study wherein we experimentally characterize the dynamics and control system of a lab-scale ocean kite, and then refine, validate, and extrapolate this model for use in a full-scale system. Ocean kite systems, which harvest tidal and ocean current resources through high-efficiency cross-current motion, enable energy extraction with an order of magnitude less material (and…
- Salomonsson et al.
The Powerkite project is developing a power take-off system (PTO) for a novel tidal energy converter by Swedish developer Minesto known as Deep Green. One of the key deliverables of the project was to develop a conceptual design of the complete offshore array system including substations, cables and grid connection, with the aim to assess the key parameters of the future tidal plant (…
- Beknalkar et al.
A marine hydrokinetic (MHK) kite offers an economical solution to the challenges of size and investment costs posed by the existing class of energy converters used to harvest tidal and ocean current energy. MHK kite systems are complicated devices that harvest ocean current energy by flying a tethered kite perpendicular to the motion of the current flow. They possess strong coupling between…
- Naik et al.
This paper presents the formulation and results for a control-aware optimization of the combined geometric and structural design of an energy-harvesting underwater kite. Because kite-based energy-harvesting systems, both airborne and underwater, possess strong coupling between closed-loop flight control, geometric design, and structural design, consideration of all three facets of the design…
- Naik and Vermillion
This paper presents a co-design framework that optimizes the kite design, site, and controller of a kite-based marine hydrokinetic (MHK) energy-harvesting system. The formulation seeks to maximize a techno-economic metric, namely power-to-mass ratio, by simultaneously considering three key categories of decision variables while accounting for the coupling between the three. The simultaneous…
- Vadlamannati et al.
The immense potential for ocean current energy harvesting is being actively explored as the push for renewable energy becomes more urgent. This paper demonstrates a tow testing platform built to examine and validate mathematical models related to the performance of tethered, underwater, hydrokinetic devices in development to harvest energy from ocean currents, and presents experimental results…
- Alizzio et al.
A scale model of a kite-like converter of tidal energy, the GEMSTAR, is designed to be installed at sea for a long term deployment. The aim of the experiment is to develope a digital twin with fault detection and isolation capabilities. To this aim, a fully-functional 1:10 scale of GEMSTAR is designed, starting from measurements of tidal currents in the site of installation. Several spots were…
- Sang et al.
The wave glider powered by waves has a unique dual-body architecture and can perform long-duration operational tasks in the ocean. In this paper, to accurately predict its maneuverability, the horizontal plane 3-degree of freedom (DOF) dynamic models of the surface float and the submerged glider are established separately. The influence of ocean currents is considered, and the influence of the…
- Vermillion
Device Design and Periodic Motion Control of an Ocean Kite System for Hydrokinetic Energy Harvesting
This project focused on the modeling, device design, control system design, and progressive experimental validation of an energy-harvesting underwater kite harvesting energy through cyclic spooling motion. This adds to the portfolio of the DoE Water Power Technologies Office has resulted in several key outcomes that will further the development of energy-harvesting kites, as detailed in the…
- Bhattacharjee et al.
This paper examines the problem of simultaneously optimizing the spooling and cross-current flight trajectory of a tethered marine hydrokinetic kite using an analytic solution of its inverse dynamics. Tethered kites hold considerable promise for energy production, especially when undergoing cross-current motion. The novelty of this work lies in the use of an analytic solution of the inverse…
- Prabahar et al.
The potential for tidal energy to be a part of future renewable energy systems is expanding. Tidal turbines deployed in open waters or channels are effective methods to harness energy from tidal currents. Sharing similar functionality with wind turbines, horizontally mounted tidal turbines require a minimum tidal current velocity to operate effectively. The Deep Green (DG) power plant which is…
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