자율운항선박의 선회특성이 충돌회피에 미치는 영향
Effect of Turning Characteristics of Maritime Autonomous Surface Ships on Collision Avoidance
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초록
자율운항선박(Maritime Autonomous Surface Ships, MASS)의 선회특성이 충돌회피에 미치는 영향을 식별하는 것은 MASS의 충돌회피에 핵심적인 단서를 제공할 수 있다. 본 연구의 목적은 다양한 타각과 선속에 의해서 변할 수 있는 선회특성이 충돌회피에 미치는 영향을 식별하기 위한 것이다. 선회특성이 충돌회피에 미치는 영향은 전장 161 미터 선박의 수학 모델을 이용하여 선회권을 관측한 후, 네 가지 충돌조우상황에 대한 충돌회피 수치 시뮬레이션의 결과를 이용하여 분석하였다. 두 선박 사이의 최소상대거리와 최소시간을 평가 변수로 이용하여 평가한 결과, 타각은 최소상대거리의 변화에 주요한 영향을 미치고, 선박의 속력은 최소시간의 변화에 주요한 영향을 미치는 것으로 나타났다. 본 연구에서 제안한 평가 방법은 MASS의 원격제어에서 충돌회피를 하나의 방법으로 적용 가능할 것으로
Abstract
Identifying the effect of turning characteristics on collision avoidance for Maritime Autonomous Surface Ships (MASS) can provide a key to avoid the collision of MASS. The purpose of this study was to derive a method to identify the effect of turning characteristics, which can be changed by various rudder angles and the ship’s speed, on collision avoidance. The turning circle was observed using a mathematical model of a 161-meter-long ship, and it was analyzed that the turning circle had an effect on collision avoidance through numerical simulations of collision avoidance for four collision situations of two ships. The evaluation results using the two variables, the minimum relative distance between two ships and the minimum time at the minimum relative distance, demonstrated that the rudder angle has a major influence on the change of the minimum relative distance, and the ship’s speed has a major influence on the change of the minimum time. The evaluation method proposed in this study was expected to be applicable to collision avoidance as a measures in remote control of MASS.
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