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Our Technology

Tohmei Group focuses on aircraft manufacturing, such as space station replenishment equipment (HTV).
We are engaged in panel assembly of domestic rocket, not only the power of manufacturing.
Excellent quality management system is highly appreciated.
ARG is made by taking advantage of our technical capabilities.

We design and build functional Anti Rolling Gyro Marine Stabilizers

The Theory

Principal of the ARG

ARG is applied to the excellent Control Moment Gyro Principal. If the rotated Gyro is inclined sideways, which generates the Gyro force to incline it toward the front and rear direction.
This is the principal of the Gyro scope.

The principal of Gyro scope

Angular momentum H of ARG’s flywheel and roll angular velocity Φ produce gyro torque Tg in accordance with the Gyro principal. Tg = H x Φ
If damper C exists, Tg would rotate the gimbal with angular velocity マエ.マエ = Tg/C
On the other side, H and マエ produce suppression torque Ts also in accordance with the gyro principal. Ts=Hxマエ
Then, Ts acts as suppression torque with proportional to boat rolling angular velocity Φ Ts= (H^2/C)xΦ

Read more about Our Advantages.

Simple ARG Construction

Our Story

Image by skeeze from Pixabay

In the early years of developing the ARG, when Mitsubishi was involved with attitude controlling for artificial satellite, an exceptionally responsive and dependable passive system was developed. We learned that the more complicated a gyro system becomes, the more likely it is to fail prematurely.

“We Have Been There And Done That!”

We rejected the pumps and lines associated with water and hydraulic systems, and did away with computer controls that caused problems. We kept what works and that is what you get with a Tohmei ARG. The computer control system is used by the active gyro stabilizer, such as Competitor, Inc but as we all know, in a humid and salty environment, this can cause a lot of problems.

We Believe That Keeping It Simple Is The Best Practice

The Tohmei Anti Rolling Gyro (ARG) is the passive gyro stabilizer system that achieves ‘hassle-free’ operation and provides better roll reduction. Anti Rolling Rate is calculated by the following formula:
Anti Rolling Rate(Nm) = Angular Moment(Nms) x maximum limit of gimbal angular velocity (rad/sec)
ARG125T: 2,500Nms x 5rad/sec = 12,500Nm (actual maximum rolling torque)
ARG250T: 5,000Nms x 5rad/sec = 25,000Nm
ARG375T: 7,500Nms x 5rad/sec = 37,500Nm
Competitor 9; 18,810Nm