%0 Book Section %T Identification of the vertical plane motion model of a high speed craft by model testing in irregular waves publisher Pergamon Press LTD %D 1999 %U 0-08-043033-3 %@ https://hdl.handle.net/20.500.14352/60852 %X Experiments in towing tanks are concerned with the determination of the motion transfer functions, which are obtained by testing in irregular waves. For this purpose a model of pitch and heave motions has been developed, and the identified models of the vertical plane motions of a high-speed craft are showed. Linear models are obtained for different sea states and ship speeds. A general low order model is obtained by pole-zero cancellation. So, a full model may be considered for simulation and verification, and a low order model for design. From the lowest order models, a state space model is obtained %~