Hydrofoil Craft Dynamics in a Realistic Sea Including Automatic Control

摘要

The six degrees of freedom equations of motion of a hydrofoil boat in short crested seas are presented. An attempt was made to make these equations as realistic as feasible by taking into account the more important non-linearities, such as the variations in the wetted area and hydrodynamic coefficients of the struts and surface piercing hydrofoils with submergence changes, changes in hydrodynamic forces and moments resulting from cavitation and ventilation, etc. Equations representing the seaway and the control system are also presented and discussed. Feedback control considerations leading to desirable stability and motions in waves are discussed. (Author)