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Abstract
The Gyroscopic Power Take-Off (GyroPTO) wave energy point absorber has the operational principle somewhat similar to the so-called gyroscopic hand wrist exerciser. Inside the float of GyroPTO, there is a mechanical system made up of a spinning flywheel with its spin axis in rolling contact to a ring. At certain conditions, the ring starts to rotate at a frequency equal to the excitation angular frequency. In this synchronized state, the generator is running at almost constant speed and the generated power becomes constant. In this paper, theoretical modeling of the GyroPTO device is carried out based on analytical rigid body dynamics, and a 3-DOF nonlinear model is established. Simulation results show that synchronization of the device is maintained under harmonic sea wave, but is lost easily under non-harmonic sea waves.To overcome this problem, a magnetic coupling mechanism is added between the spin axis and the flywheel, which also makes semi-active control of the device possible. A 4-DOF model is then established, and simulation results show the introduced magnetic coupling successfully enables synchronization of the device under non-harmonic sea waves.
Original language | English |
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Journal | Procedia Engineering |
Volume | 199 |
Pages (from-to) | 1828–1833 |
ISSN | 1877-7058 |
DOIs | |
Publication status | Published - 2017 |
Event | The X International Conference on Structural Dynamics, EURODYN 2017 - Sapienza University of Rome, Rom, Italy Duration: 10 Sept 2017 → 13 Sept 2017 Conference number: 10 |
Conference
Conference | The X International Conference on Structural Dynamics, EURODYN 2017 |
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Number | 10 |
Location | Sapienza University of Rome |
Country/Territory | Italy |
City | Rom |
Period | 10/09/2017 → 13/09/2017 |
Keywords
- Gyroscopic power take-off
- Wave energy converter
- Dynamics
- Control
- Synchronization
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Dive into the research topics of 'Dynamics and Control of the GyrpPTO Wave Energy Point Absorber under Sea Waves'. Together they form a unique fingerprint.Projects
- 1 Finished
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Urban Tranquility
Andersen, L. V., Bucinskas, P., Damkilde, L., Frier, C., Jensen, R. L., Madsen, S., Parigi, D., Pedersen, L., Svidt, K., Ulriksen, M. D., Gerdt, T. L. & Wyke, S.
01/01/2016 → 31/12/2018
Project: Research