ABSTRACT
CPP has recently attracted considerable attention on ships with publicized demonstrations.The background of CPP for ships was reviewed by Aarseth (2002). By using this type of propeller, significant achievements in ship maneuverability can be carried out. Selection of the control schemes is also important during the design process. To simplify models, a number of researchers assumed three main control schemes. The first one corresponds to a fixed pitch propeller. The second alternative is to fix the shaft speed. The last alternative is applied by Fukuba et al. (1996), which examines both pitch and shaft speed simultaneously. In this study CPP with fixed shaft speed are used. Sorensen et al. (1997) applied experimental verification on torque and power control for fixed pitch propellers. Ruth (2004) considered how to apply controllable pitch thrusters. A method in this reference for model-based optimal control of consolidated controlled thrusters, where both pitch ratio and motor torque was developed.
