• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.05a
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• pp.290-291
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• 2018

최근 해상교통량이 증가하고 연안 항해에 대한 관제 필요성이 요구되면서 선박 교통 관제구역이 점차 확대되는 추세이다. 이러한 관제구역의 확대는 관제사의 업무 부하를 초래하며, 이로 인해 교통 혼잡 시간대와 같이 교통량이 급증하는 경우 관제사가 위험 상황을 인지하지 못하는 상황도 발생하게 된다. 이러한 배경에서 본 논문에서는 관제 업무의 지원을 위해 이상 거동 선박을 자동으로 식별하는 방법을 제안하고자 한다. 제안하는 방법은 기계학습 기술을 기반으로 관제구역 내의 통항 패턴을 모델링하고, 이를 통해 이상 거동 선박을 식별하는 방법으로, 대상 항만의 누적된 AIS 데이터를 이용하여 모델을 학습하며, 실제 항적 및 시뮬레이션 데이터를 이용한 실험을 통해 선박교통관제시스템에의 활용 가능성을 고찰한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.133-135
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• 2020

현재 자율운항선박의 성공적 달성을 위해 다양한 연구개발이 진행 중이며 이와 관련하여 자율운항선박의 안전항해 지원을 위해 자율운항 지원 서비스와 해양사고 대응 서비스가 개발되고 있다. 자율운항 지원 서비스는 전자해도표시시스템(ECDIS, Electronic Chart Display and Information System)에서 수립하는 항로 계획 정보를 육상 운항조정상황실에 전송하여 충돌 위험 예측 후 유용한 정보를 자율운항선박에게 제공하는 서비스이다. 이 서비스를 통해 타 선박과 자율운항선박간의 조우 지점과 타 선박의 사전 변침정보를 미리 알 수 있기 때문에 충돌 예측 정보로써 활용할 수 있다. 해양사고 대응 서비스는 현재 사람에 의존적인 해양사고 상황인식 및 해양사고 대응기관에 전파하는 것을 자동으로 상황을 인식하고 사고 대응하는 서비스이다. 이 서비스를 통해 사고 단계별 유용한 정보를 사고선박 및 주변 해양사고 대응기관에 정보를 제공함으로써 추가적인 해양사고 방지와 즉각 대응이 가능하다. 본 연구에서는 2가지 서비스를 성공적으로 제공하기 위해 시스템의 요구사항을 분석하고 시스템 아키텍처를 설계하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.371-373
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• 2022

현재 선박의 항로계획은 항해사들의 항해지식과 경험을 바탕으로 이루어지고 있다. 하지만 자율운항선박의 등장으로 항로계획의 자동화에 대한 연구가 학계와 산업계에 관심이 높다. 본 연구에서는 AIS 데이터를 활용하여 선박의 항로계획을 자동으로 생성하기 위해 격자기반의 최단경로 알고리즘을 활용하였다. 이는 자율운항선박의 항로계획 생성에 있어 안전성과 효율성을 향상시킬 수 있다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.193-194
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• 2021

실습선 한나라호는 4차 산업혁명에 부응하는 첨단장비와 안전한 시설을 갖추고 있으며, 자동위치제어시스템(DPS)를 적용하여 해양플랜트 교육이 가능한 9,196톤으로 아시아 최대 실습선이다. 또한, 특수목적선 코드를 적용해 감항성능 및 안전성이 매우 우수하다. 본 연구에서는 실습선의 안전한 접이안과 항내조선을 위해 VDR과 CCT 자료를 이용한 모니터링을 통해 매우 협소한 영역내에서 전개되는 동적 거동정보의 정량적 수집, 평가, 분석을 통해 안전통항의 저해요인을 식별하고 이를 제거 및 방지하기 위한 방법에 대해 제안하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.20-21
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• 2016

Aids to Navigation (AtoN) is marine traffic safety facility to facilitate the safe and efficient movement of shipping and enhance the protection of the marine environment by the regulation or guideline of The International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA). By IALA NAVGUIDE, the term "New Danger" is defined as newly discovered hazards not yet shown in nautical documents and includes naturally occurring obstructions such as sandbanks or rocks or man-made dangers such as wrecks. 'New Dangers' should be appropriately marked using Lateral, Cardinal, Isolated Danger marks or by using the Emergency Wreck Marking Buoy. However, the Emergency Wreck Marking Buoy has difficulties with implementation conditions in terms of speed and accuracy to install the buoy. In case of sinking accidents, it is difficult immediately to install the Emergency Wreck Marking Buoy because of weather conditions, marine environments and accident position. This paper studies Auto Releasing New Danger Mark Buoy on the deck which can be automatically to release from the deck of a vessel and float in the water and quickly install the accident position in case of sinking accidents. The buoy will be to reduce the risk of navigation and prevent secondary collisions.

• Journal of Navigation and Port Research
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• v.30 no.3 s.109
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• pp.241-245
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• 2006

Displayed result that handle particle contaminant and hydrospace organism included a number of ballast that is happened in ship using automatic back washing filter. Reason that removes first contaminant that is included in number of ballast is that heighten processing effectof after processing processof the filter. Another advantage is to drop off the solids with controlling revolution of drum screen in pretreatment filtration process. The fact that it is easy to attach and detach a several type of screen for getting the expected water quality is another advantage. Filter rotation speed of filtration filter could be expose by 35mmHg more than 60 rpm and filter consecutively filtration pressure is 40.5mmHg in 20 rpm and 40 rpm are 36.6mmHg. Filtration system removal aquatic organism over $70{\mu}min$ ballast water. This study shows that the filtration treatment system has a potential for the treatment of ballast water.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2005.10a
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• pp.181-185
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• 2005

The treated ballast water from previous treatment contains microorganisms and pathogenic organisms in an filtration treatment system. The advantage of this process can be filtrated to minimize the demage to screen clogging of drum filter with sweeping the solids off rotating the surface of the filter. Another advantage is to drop off the solids with controlling revolution of drum screen in pretreatment filtration process. Also the fact that it is easy to attach and detach a several type of screen for getting the expected water quality is another advantage, too. Filter rotation speed at 20rpmis 40.5cmHg and 40rpm is 36.6cmHg. Filter out impurities from ballast water over 60rpm is 35cmHg. Filtration system removal aquatic organism over $80{\mu}m$ in ballast water. This study shows that the filtration treatment system has a potential for the removal of ballast water.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.04a
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• pp.197-202
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• 2004

It is well known that the hydrodynamic interaction forces between ship and bank wall affect ship manoeuvring motion. This paper deals with the interaction effect acting on a ship navigating closely in the proximity of bank wail. In this paper, the calculation method based on the slender body theory for estimation of the hydrodynamic interaction forces between ship and bank wail is applied. The hydrodynamic interaction forces acting on a ship during passing through the proximity of the bank wail are predicted to evaluate an influence of these interaction forces on ship manoeuvrability. The calculation method used in this paper will be useful for prediction of ship manoeuvrability at the initial stage of design, for automatic control system of ship in confined waterways, for discussion of marine traffic control system and for construction of harbour.

• Journal of Navigation and Port Research
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• v.28 no.5
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• pp.333-337
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• 2004

It is well known that the hydrodynamic interaction forces between ship and bank wall affect ship manoeuvring motion This paper deals with the interaction effect acting on a ship navigating closely in the proximity of bank wall. In this paper, the calculation method based on the slender body theory for estimation of the hydrodynamic interaction forces between ship and bank wall is applied. The hydrodynamic interaction forces acting on a ship during passing through the proximity of the bank wall are predicted to evaluate an influence of these interaction forces on ship manoeuvrability. The calculation method used in this paper will be useful for prediction of ship manoeuvrability at the initial stage of design, for automatic control system of ship in confined waterways, for discussion of marine traffic control system and for construction of harbour.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2002.11a
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• pp.113-119
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• 2002

Recently, an automatic crane control system is required with high speed and rapid transportation. During the operation of crane system in container yard it is necessary to control the crane trolley position and loop length so that the swing of the hanging container is minimized We can do development of unmanned automation control system using automation travel control technique and anti-sway technique in crane system. Therefore, we designed a controller for Automation travel control to control the transfer crane system. Analyzed crane system through simulation, and proved excellency of control performance than other conventional controllers.