Control of Ship Roll and Yaw Angles During Turning Motion

Burak Göksu,Kubilay Bayramoğlu

doi:10.33714/masteb.930338

Burak Göksu, Kubilay Bayramoğlu

Open Access

https://doi.org/10.33714/masteb.930338

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Abstract

The aim of this paper is Ships are exposed to assorted hydrodynamic forces originating from internal and external influences. The adverse effect of rolling caused by turning motion should be reduced with anti-rolling systems, to ensure safe navigation. If this effect is not eliminated, it may prevent the ship from keeping its course safely. In this study, fin stabilizer system the computational analysis of the roll motion formed by the turning motion and wave effect is included in fin stabilizer system. The rudder motion that allows the ship to have the desired maneuvering angle; calculations of the fin system, which decreases the excessive roll moment, and the roll motion caused by these two effects are examined using MATLAB software. The analysis period has been determined as 300 seconds, which is the time to reach the desired turning angle of the ship. Linear quadratic tracking (LQT) algorithm has been used to solve partially unknown continuous-time problems such as roll motion in this study.

Highlights

It is estimated that around 90% of the world trade volume is achieved by sea transportation
According to the Abkowitz (1969) method, hydrodynamic forces and moments acting on ship body are the unknown nonlinear functions of location, speed and acceleration in six degrees of freedom
Taylor series expansions are used in the calculations of hydrodynamic forces, but the high-order hydrodynamic coefficients are neglected in this expansion (Lihua et al, 2018)

Summary

Introduction

It is estimated that around 90% of the world trade volume is achieved by sea transportation. The volume of the ship fleet increases in parallel with this expansion (Lu et al, 2017). It is a common concern that ships are always strived to navigate at a certain speed to minimize spending time and fuel consumption. Various studies are carried out to remove the obstacles that arise while increasing energy efficiency (Lihua et al, 2018). One of the issues to be considered about safe navigation is the control of roll movement.

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