• 한국항행학회논문지
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• 제22권6호
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• pp.507-513
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• 2018

자율운항선박은 인간의 개입을 최소화하고, 선박에게 주어진 임무를 안전하게 수행하기 위해 운항에 필요한 다양한 정보를 자동으로 수집 관리하며, 선박이 스스로 판단하여 정해진 목적지까지 부분 또는 전체 항로를 자율적으로 운항하거나, 필요시 부분적으로 원격관제에 의해 운항을 가능하게 하는 선박운항기술을 말한다. 이러한 선박의 안전운항을 위해 선박에 탑재된 다양한 항해 통신장비 및 엔진, 기관 등의 각종 센서로 부터 신호를 수집 및 관리하기 위해서는 공통플랫폼 기술이 필요하다. 이 논문에서 제안하는 공통플랫폼은 스마트 선박 구현의 핵심으로 육상과 선박 간의 위성통신 또는 지상파 통신으로 연결된 통신 환경에서 실시간으로 원활한 정보 교환을 통해 육상의 관제국에서 모니터링과 원격관제를 지원하여 해상의 안전한 선박 운항을 가능하게 한다.

• 대한기계학회논문집
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• 제18권3호
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• pp.777-784
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• 1994

A design expert system for the ship structural design is developed to support inexperienced designers. To establish the knowledge-base, an expert system development shell, Nexpert, is used. Knowledge is extracted from the rules of a classification society of ships, and also from an existing ship structural program that is being used by ship designers. This knowledge is systematized using the objectoriented concept. The design support system is constructed by adding additional functions which are required for the conventional engineering design work. Added functions are; calculation of longitudinal strength, database of existing ship designs, graphical user interface, and visualization of design results. It is observed that visualizing the relationships among the rules, which are activated to draw a certain design decision, is helpful. The system can easily be updated according to changes of the rule books of ship classification societies.

• 해양환경안전학회지
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• 제3권1호
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• pp.51-71
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• 1997

As passenger ship accidents so frequently have occurred, crisis consciousness is highly aroused in Korean society. Although bombastic policy guidlines were suggested in accordance with every passenger ship accident, there remains a still high possibility of such an accident reoccurring because passenger ship accidents occur from the perspective of non-compliance. The research objective of this study is to government's safety regulatory policies. Data for the analysis was collected from literature review. A Case study related to passenger ship accident is adopted for the analysis. The research methods utilized in this study consist of extensive quantitative analysis of 138 passenger ship accidents which had happened over last 10 years from 1984 to 1993 in Korea and a qualitative analysis of the passenger ship accident of the Seohae Ferry in October 1993. The results of the quantitive analysis on the 138 passenger ship accidents are as follows; Seeing the accidents yearly, the accidents which occurred by policy non-compliance are still exist, only somewhat reduced as years gone by. Seeing the accidents from the perspective of types of accident, fire accidents and death and injury accidents had more non-compliance factors than contact accidents and one-side collision accidents, etc. had. Seeing the accidents from the perspectives of types of passenger ship, large ships like car ferries and general passenger ship accidents had more non-compliance factors than any other kinds of ships had. Seeing the accidents from the perspectives of tons of passenger ships, large ships weighing more than 1, 000 tons and small ships weighing less than 50tons contained a lots of non-compliance factors. The results of the qualitative analysis of the passenger ship accident of the Seohae Ferry in Octovber 1993 are as follows; From the viewpoint of the human factor, there were non-compliance to the recruiting of required number of qualified crew members and non-compliance to the rule which prohibited them from leaving port in bad weather and high wave conditions. From the viewpoint of the ship factor, there were defects in the ship. So we might say that there was non-compliance which was aroused from the lacks of technical skills. From the viewpoint of the administrative factor, there were many non-compliance factors such as sailor education, shipping management, rescue, safety equipment. From the viewpoint of the passenger factor, there were passengers' threats which compelled the crews to leave the port under bad weather conditions. In conclusion, the principal non-compliances factors are passenger ship company did not follow safety rules such as shipping the permitted number of passengers, loading permitted tons of freight and fastening freights properly and recruiting required number of qualified crew. In order to reduce accidents, firstly we should find out the causes which play key roles in passenger ship companies' non-compliance to the government's safety regulations. Secondly we should tackle the causes.

• 해양환경안전학회지
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• 제3권1호
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• pp.33-49
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• 1997

One of the most important missons that are imposed on merchant ship at sea is to accomplish the safe transportation of cargo loaded. Recently, a study on the seakeeping performance has been carried out on the development of evaluation system related to the synthetic safety of a ship at sea. The seakeeping performance is the ship's ability sailing at, and executing its misson against adverse environmental factors successfully and safely. Until now, however, there has not been any method of quantitative evaluation on the dynamic safety of the ship's cargo loaded. In this regards, this paper has introduced the evaluation method of dynamic safety of the ship's cargo. In order to evaluate the dynamic safety of cargo, the vertical and lateral acceleration which causes the collapse, racking and local structure failure of cargo was adopted as the evaluation factors in the ship's motions. The response amplitude of ship's motions in regular waves is manipulated by NSM (New Strip Method) on a given 2,700 TEU full container vessel under the wind forces of 7, 8 and 9 Beaufort scale. Each response of ship's motions induced by NSM was applied to short-crested irregular waves for stochastic process on evaluation factors and then vertical and lateral acceleration of each cargo was compared with significant amplitude of each acceleration. A representative dangerous factor was determined by comparing permissible values of stacking and racking forces occurred typically to the vertical and transverse directions with the container strength required on ISO 1496 at the positions of forecastle, poop and ship's midship respectively. Through the occurrence probability of the determined factor by Rayleigh's probability density function, the dangerousness which limits loads on container's side wall as an evaluation was applied in judging of the danger of the ship's cargo loaded.

• 한국통신학회논문지
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• 제35권9B호
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• pp.1314-1321
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• 2010

선박 접안 유도시스템은 선박 내에 장착된 위치 기반 UWB(Ultra WideBand)와 해안에 설치된 리더기를 통해 받은 접안 지점 내의 선박 정박 유무 정보를 바탕으로 관제시스템이 접안을 요청한 선박에 대해 선박의 크기와 종류를 판별하여 그 결과에 따라 접안이 가능한 지점의 위치 정보를 해당 선박에 무선 송출하여 선박의 접안을 유도한다. 이는 선박의 정박시간 대기로 발생하는 불필요한 연료의 낭비와 접안 과정 중 발생하는 충돌 사고를 예방하여 안전성을 제시할 수 있다. 본 연구에서는 위치기반 UWB를 이용한 선박 접안 유도시스템의 테스트베드를 구현하였다. 또한 java 기반의 사용자 인터페이스를 구현하여 모바일 기기 등을 통해 실시간으로 동종의 선박들 가운데에서 사용자의 선박의 위치를 쉽게 인지할 수 있도록 정박 위치 정보를 제공하는 편의성을 제공한다.

• 동력기계공학회지
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• 제10권4호
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• pp.139-146
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• 2006

In this paper vector code correlation(VCC) method and an algorithm to promote the image processing performance in building an effective measurement system using cameras are described for automatically berthing and controlling the ship equipped with side thrusters. In order to realize automatic ship berthing, it is indispensable that the berthing assistant system on the ship should continuously trace a target in the berth to measure the distance to the target and the ship attitude, such that we can make the ship move to the specified location. The considered system is made up of 4 apparatuses compounded from a CCD camera, a camera direction controller, a popular PC with a built in image processing board and a signal conversion unit connected to parallel port of the PC. The object of this paper is to reduce the image processing time so that the berthing system is able to ensure the safety schedule against risks during approaching to the berth. It could be achieved by composing the vector code image to utilize the gradient of an approximated plane found with the brightness of pixels forming a certain region in an image and verifying the effectiveness on a commonly used PC. From experimental results, it is clear that the proposed method can be applied to the measurement system for automatic ship berthing and has the image processing time of fourfold as compared with the typical template matching method.

• 한국정보통신학회논문지
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• 제9권6호
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• pp.1202-1210
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• 2005

대양을 운항하는 선박들의 효율적이고 안전한 운항 관리를 위해 국제 해상법적 환경이 강화되고 있으며, 선박과 육상간의 정보 공유에 대한 요구가 증대하고 있다. 이에 따라 디지털 선박, 선박 통합화 플랫폼, 선박 통합화 네트워크에 대한 연구가 미국과 유럽 등에서 활발히 진행되고 있다. 본 논문에서는 선박 통합화 플랫폼을 연구하고, 선박 통합화 시스템 구축의 핵심이 되는 선박 통합화 네트워크의 설계 및 구현을 수행하였다. 선박 내 각종 시스템 및 기기들을 계층별 네트워크를 구성하고 통합화 프로토콜을 설계하였으며, 선박 통합 정보들을 표준화된 플랫폼으로 관리하고 필요한 정보를 선박-육상 네트워크를 통해 육상으로 전송하여 육상에서 관리 및 지원이 가능한 시스템을 구현하였다. 또한 설계${\cdot}$구현된 선박 통합화 시스템을 실제 운용중인 선박에 적용하여 시스템의 신뢰성 및 선박-육상간의 지원체계의 효용성을 확인하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2019년도 추계학술대회
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• pp.271-271
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• 2019

선체운동은 외력관계 등 복잡한 환경에서 발생하므로 추정이 난해하다. 선체운동의 추정은 선박의 안전을 확보할 수 있는 중요한 요소이므로 정확한 추정이 필요한 실정이다. 기존의 선체운동관련 연구는 특정 선형에 대한 선체운동을 실험하여 획득한 모델과 기준이되는 모델의 겉보기 운동을 비교한 것으로 선체운동을 직관적으로 추정하기 난해하다. 본 연구에서는 선형-시불변 (Linear-Time lnvariant)시스템의 전달함수 기법을 적용해 선체운동을 극-영점 해석과 주파수 응답 분석을 통해 선체운동의 특성을 전달함수로 추정하는 개념을 소개한다. 선형-시불변 시스템을 이용한 선체운동 해석 모델은 1)파랑의 입력신호와, 2)선체운동의 출력신호, 3)블랙박스로 정의된 선체로 구성된다. 본 모델은 선체운동을 전달함수로 수치화 하여 정의할 수 있고, 극-영점해석 및 주파수 응답 분석을 통해 선체운동의 특성을 추정하는데 용이할 것으로 기대된다.

• 수산해양교육연구
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• 제29권1호
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• pp.158-168
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• 2017

The aim of this study is to propose the plausibility of Ship-repair industry brand in the global market. It has been argued that it is necessary to secure the identity of company because of the expansion of international market in the age of globalization. Authors of this paper have considered that the brand is a solution for global ship-repair industry's development in Busan region with focusing on the 5 elements (Salience, Imagery, Performance, Feeling, and Judgments) of Keller's brand equity block except Resonance. As a result, we presented the roles of company for securing the brand equity in ship-repair industry comparing with the elements of Keller's brand equity block. and implied the plausibility of global ship-repair industry's development. Especially, Securing the licences and certifications related to ship-repair industry is very important thing about the brand equity.

• 한국항해항만학회지
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• 제28권2호
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• pp.113-119
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• 2004

Ships' collision accident has often occurred in congested waterways or in harbour areas. To examine the cause of collision accident may be necessary to prevention against another similar one. We discuss the construction of ship-manoeuvring-simulator system used for reproducing ships' collision phenomenon The system consists of one simulator bridge for own ship and two control consoles for own ship and target ship. Own ship and target ship are linked each other, and are simultaneously manoeuvred in simulator bridge or at control console respectively. And a simulator experiment for reproducing ships' collision phenomenon and for examining the cause of accident is carried out. Through the present case study, we find out that the constructed simulator system is very useful for reproducing ships' collision phenomenon and for examining the cause of accident.