Seiji Iwamoto

Studies on the Control System Design of Ship Manoeuvring Motion with Decoupling Control

Abstract A rational and clear design method for a multi-variable control system using the decoupling control theory and the root-locus technique is proposed. The control system shows equal or better controllability as that of the ILQ design method if an equivalent time constant is given, and furthermore, shows good controllability in a non-linear mathematical model as a controlled object.

The Preliminary Study of Fin and Rudder Multivariate Hybrid Control System- Advanced Rudder Roll Stabilization System-

Abstract The combination of fin and rudder seems to be an attractive alternative for roll damping. However fin motions as well as high frequency rudder motions disturb the heading control system. In order to reduce this interaction, this paper proposes the advanced rudder roll stabilization control system with hybrid fin control system. From results of simulation and model experiments, it can be concluded that the fin and rudder hybrid control system is powerful and useful tool for stabilization of roll and course keeping.