On Wave-Excitation Free Ship Forms

Wave Effects on Free Running Ship in Standard Zigzag Maneuver

On Kelvin ' s ship - wave pattern

When a concentrated pressure travels with constant velocity over the free surface of water, it carries with it a familiar pattern of ship waves. Let viscosity and surface tension be neglected, let the free-surface condition be linearized, let the depth of water be assumed infinite, and let initial transient effects be ignored. Then, as is well known, the wave motion everywhere can be found by s...

Comparison on the traveling wave excitation and the conventional excitation

Introduction: Traveling wave imaging has been suggested as a promising method for large FOV imaging in high field MR because in the empty bore it has a nearly constant magnitude along the propagating direction. However, the traveling wave system has thus far not been quantitatively compared with the conventional volume coil designs at high field to evaluate its performance in terms of efficienc...

A Ship-borne Wave Recorder

High Performance Ship Autopilot With Wave FilterThor

This paper describes the application of Lyapunov stability theory to automatic steering of ships. The motivation for using nonlinear control theory is that nonlinearities can be compensated for in a systematic manner. For instance, this allows the designer to design the autopilot system for a ship described by the nonlinear models of Norrbin (1963) and Bech and Wagner Smith (1969) both utilizin...