Abstract
Dynamic positioning control tests were carried out for a semi-submersible two-lower-hull type platform model in the simulated environment for offshore current, wind and wave in a ship model basin. Prior to the control tests, hydrodynamic characteristics of the platform and the propulsion systems were measured and computer simulations were made to obtain the basis for the design of the dynamic positioning control system. The results of over-all control tests indicate that the dynamic positioning control is duly practicable at the two-lower-hull type semi-submersible platform.
