Automatic Control f for Ship Collision Avoidance Support – Ⅱ

Im, Nam-Kyun

Journal of Navigation and Port Research 2004;28(1):9-16.
Published online February 28, 2004.

선박충돌회피지원을 위한 자동제어–Ⅱ

임남균

Automatic Control f for Ship Collision Avoidance Support – Ⅱ

Nam-Kyun Im

Abstract

The purpose of this study is to examine the algorithm of ship collision avoidance system and to improve its performance. The study on the algorithm of ship collision avoidance system have been carried out by many researchers. We can divide the study according o the adopted theory into two category such as ‘collision risk calculation method’ and ‘risk area method’. It is not so difficult to find heir merit and demerit in the respective method. This study suggested newly modified model, which can overcome a limit in the two method. The suggested model is based on collision risk calculation method and suggests how to solve the threshold value problem, that is, one of the unsolved issues in collision risk calculation method. To solve that problem this study proposed new system under which the users can select appropriate threshold value according to environments such as traffic situations and weathers conditions. Simulation results of new model is schematized using ‘risk area method’ to examine the relationships between the two method. In addition, in case of ‘collision risk method’, when TCPA and DCPA are used to determine collision risk, a problem happens, that is, two ships become too close in their stem area, therefore, partial function of ‘risk area method’ is adopted to solve the problem in suggested model.

Key Words: ship collision avoidance;ship manoeuvring;automatic control