Steering Control of a Ship in a Canal (Part I)

抄録

In this study we apply the transfer function approach to the steering control of a ship in canal. The directional stability in a canal and the effect of the canal dimensions on the behavior of a ship are studied in details. Also we analyse the automatic steering in a canal; the effect of control gain parameters on the response are studied by Nyquist criterion, eigenvalue analysis, and by calculating the time history. The behavior of a ship in a canal can be stabilized without oscillation by proper combination of heading and position control. Also we find that, the ship motion in a canal can be represented by a simplified mathematical model, i.e. second order differential equation. The parameters of the simplified model are determined by fitting the model to the ship motion obtained by the exact mathematical model, i.e. the original equation of motion.