Abstract
In the field of marine construction, traffic ships are used to board/go ashore to the floating structure such as working vessels. However, traffic ships are fluctuated in such environments as tidal waves, and workers face an increased risk of accidents such as falls in the sea and pinched between traffic ships and floating structure. Therefore, it is great issue to be resolved. Then, we focus attention on the possibility to contribute safety and workability out of consideration of ship fluctuation if anywhere on the fluctuated working vessels will be kept in a horizontal position. The active vibration compensator with Stewart Platform is a new concept of traffic ships, which has a motion stabilized platform. The platform is supported on the main hull by means of 6-D.O.F hydraulic parallel mechanism which act to absorb motion of main hull in accordance with the control signal from an on-board computer and motion sensors. Trial results show that 66%-84% of the heave, roll and pitch motion of the main hull is absorbed and the platform is kept almost horizontal.
