Principle and feasibility analysis of an anti-rolling device based on vector propeller

Abstract

In order to improve the efficiency of anti-rolling device at whole speed range and reduce its occupancy of the cabin volume, an anti-rolling device based on vector propeller is proposed and its practical application is demonstrated in this paper. Firstly, the motion models of the wave and the ship's rolling and anti-rolling are established. The vector propeller anti-rolling device is then designed based on these motion models, and its structural design, attitude sensing module and control system are briefly described. And the propeller performance is also analyzed to make the anti-rolling torque generated by the device more accurate. On this basis, a laboratory experiment based on ship model was carried out, using a moving slider mounted on the ship model to simulate the rolling effect under regular waves. The average anti-rolling effect under laboratory conditions can reach 80%. In addition, the real ship experiment at sea was further carried out. The average anti-rolling effect can reach 50%. Although the anti-rolling effect of real ship experiment at sea is reduced, it can still meet the ship comfort standard. Consequently, the experimental results show that the proposed anti-rolling device has a good practical value.