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Marine and Aerial Control Systems Lab
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A ship motion lab that studies both ships and ocean waves.
AboutAbout the lab
Designing safe, comfortable ships through the study of waves
The Marine and Aerial Control Systems Lab studies ship motion and ocean waves with the aim of realizing safe and comfortable ships.
Because the waves that ships encounter are also important, half of the lab's research is devoted to methods of observing ocean waves and clarifying the properties of ocean waves themselves.
Ocean waves still hold unknown aspects, such as rogue waves including pyramidal waves, and new styles of ships that avoid them can also be imagined.
The lab also studies flying boats and underwater vessels as related to ships.
Key terms
- Wave generator
- A device that artificially generates waves in a water tank. The lab's wave generator controls 24 floats by computer.
- Directional wave buoy
- A device that floats on the sea and measures wave conditions. It can measure wave direction as well.
- Flying boat
- An aircraft that takes off from and lands on water. The lab aims to improve its takeoff and landing performance in waves.
ResearchResearch themes
The lab studies both ship motion and ocean waves, aiming to improve the safety and comfort of ships. It also covers flying boats and underwater vessels as related to ships.
*Illustrative imageReproducing Ocean Waves
This wave generator is 8 m wide and consists of 24 floats. A computer moves each float up and down individually, so it can artificially create any desired ocean waves. It is the first such facility in the world for a towing tank.
*Illustrative imageModel Testing System for Flying Boats in Waves
The lab developed this system because flying boats are expected to play an even greater role in the future. It is the first in the world for self-propelled, propeller-driven models, and aims to develop technology that improves takeoff and landing performance on water in waves.
*Illustrative imageDevelopment of the YNU Directional Wave Buoy
Conventional wave measurement buoys weigh as much as 300 kg and are not easy to transport. Yokohama National University has developed a mini directional wave buoy of about 13 kg that can measure sea conditions, including wave direction, even in areas such as ship sea trial waters.
MembersFaculty
- Associate ProfessorYoshiaki Hirakawa
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Waves seen from the ship by Serdiuk K” Kateryna Serdiuk / CC BY-SA 4.0 (cropped)
- Reproducing Ocean Waves: “JACOEL-Wave Tow Tank-Image16 cropped” 作者不詳 / Public domain (cropped)
- Model Testing System for Flying Boats in Waves: “Beriev A-40 Gelendzhik 2Sept2004” Yevgeny Pashnin / CC BY-SA 3.0 (cropped)
- Development of the YNU Directional Wave Buoy: “Wave rider buoy” Rémi Kaupp / CC BY-SA 3.0 (cropped)
- Related lab (Marine Hydrodynamics Lab): “Vertical bifacial floating solar with offshore wind turbines” Wikideas1 / CC0 (cropped)
- Related lab (Ship and Ocean Structural Design Lab): “Hull 801 at Ferguson Marine shipyard - geograph.org.uk - 5440348” Thomas Nugent / CC BY-SA 2.0 (cropped)
- Related lab (Aeronautical Fluid Dynamics Lab): “2011 01 Wirbelst rke 4000” DLR / CC BY 3.0 (cropped)
- Related lab (Ocean Space Utilization Engineering Lab): “RP FLIP (Floating Instrument Platform) in August 2009 (cropped)” U.S. Navy / Public domain (cropped)
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