• International Journal of Control, Automation, and Systems
• /
• 제5권5호
• /
• pp.539-546
• /
• 2007

The important field of research in ship operation is related to the high efficiency of transportation, the convenience of maneuvering ships and the safety of navigation. For these purposes, many intelligent technologies for ship automation have been required and studied. In this paper, we propose an intelligent voice instruction-based learning (VIBL) method and discuss the building of a ship's steering control system based on this method. The VIBL system concretely consists of two functions: a text conversion function where an instructor's inputted voice is recognized and converted to text, and a linguistic instruction based learning function where the text instruction is understood through a searching process of given meaning elements. As a study method, the fuzzy theory is adopted to build maneuvering models of steersmen and then the existing LIBL is improved and combined with the voice recognition technology to propose the VIBL. The ship steering control system combined with VIBL is tested in a ship maneuvering simulator and its validity is shown.

• 수산해양기술연구
• /
• 제23권3호
• /
• pp.111-116
• /
• 1987

이상으로부터 다음의 결론을 얻는다. 조파저항 이론의 전개에서 Michell 적분보다 더욱 정밀한 Neumann-Kelvin 문제가 복잡한 kernel 함수 때문에 많은 시간과 노력이 필요하지만, 원점 부근에서 Kelvin 소오스의 점근거동을 조사하여 세장체 근사를 행함으로 N-K 문제의 kernel 함수에 대한 근사와 동등하게 처리될 수 있었다. 조파저항의 계산 결과가 Michell 적분과 비슷한 경향을 보이나, 실험치와의 정확한 비교를 할 수 없었다. 그러나 세장선 이론을 적용함으로써 훨씬 복잡하고 지루한 작업을 들 수 있었다. 전진 속도를 갖는 경우에는 수정된 Green정리를 이용하면 될 것으로 기대된다.

• 대한조선학회논문집
• /
• 제50권3호
• /
• pp.182-189
• /
• 2013

In the development process of new naval ships, it is necessary to make the effort of the signature management and reduction of ship infrared(IR) signature to increase the ship survivability(susceptibility). So far the ship's contrast radiant intensity is used as a ship IR signature design criteria during the naval ship design stages. However, nowaday it is in a state of disorder at the basic design stage because of the lack of any related studies and methods. In this study, the IR signature management methods for improving the signature reduction and ship survivability are suggested by the comparison analysis of the advantages and disadvantages of signature management techniques. And also the criteria for the ship signature management are suggested when considering the infrared signature measuring assets and sea trial environments of the Korean peninsula.

• 한국해안해양공학회:학술대회논문집
• /
• 한국해안해양공학회 2003년도 한국해안해양공학발표논문집
• /
• pp.1-9
• /
• 2003

This paper discusses on recent topics on harbour tranquility base on ship motions. Harbour tranquility is mainly discussed only wave height inside a harbour at the first research period. In these twenty years, researches to improve harbour tranquility have been focused on ship motions to reduce mooring troubles facing to open seas. (omitted)

• 한국CDE학회논문집
• /
• 제4권4호
• /
• pp.381-390
• /
• 1999

In this study, a pseudo ship structure data model for the :.hip cargo hold structure based on STEP is proposed. The proposed data model is based on Application Reference Model of AP218 Ship Structure which is the model that specifies conceptual structures and constraints used to describe the information requirements of an application. And the proposeddata model refers the Ship Common Model framework for the model architecture which is the basis for ongoing ship AP development within the ISO ship-building group and the ship product definition information model of CSDP research project for analyzing the relationship between ship structure model entities. The proposed data model includes Space, Compartment. Ship Structural System, Structural Part and Structural Feature of cargo hold. To generate this data model schema in EXPRESS format, ‘GX-Converter’was used which enables user to edit a model in EXPRESS format and convert schema file in EXPRESS format. Using this model schema, STEP physical file containing design data for ship cargo hold data structure was generated through SDAI programming. The another STEP physical file was also generated containing geometry data of ship cargo hold which was extracted and calculated by SDAI and external surface/surface intersection program. The geometry information of ship cargo hold can be then transferred to commercial CAD system, for example, Pro/Engineer. Examples of the modification of the design information are also Presented.

• 한국산학기술학회논문지
• /
• 제14권11호
• /
• pp.5442-5447
• /
• 2013

본 연구는 해상에서 선박간의 충돌상황을 회피하기 위한 선박 충돌 회피 우선순위지정 및 회피모델의 개발에 중점을 두었다. 이 논문에서는 DCPA, TCPA, VCD 등의 개념을 새롭게 접근하였고, 타 함정의 AIS, GPS 등에서 수집 가능한 정보, 즉 침로, 속도, 목적지, 길이 등을 바탕으로 선박의 조함자가 사전에 설정한 DCPA를 적용하는 SCAAM 개념을 제안하였다. 만약 선박이 충돌 위험이 존재한다면 조함자는 SCAAM을 이용하여 회피항해 또는 현재 침로-속도를 유지할 것인지를 결정하게 된다. 그리고 조함자가 회피를 결심하게 되면 선박은 국제해상 충돌예방규칙에 의거 회피를 결정하게 될 것이다. 따라서 이 연구는 사람의 실수로 인한 선박 충돌사고를 감소함으로써 선박의 안전항해에 기여할 수 있다.

• Journal of Ship and Ocean Technology
• /
• 제9권3호
• /
• pp.23-32
• /
• 2005

Ship STEP(Standard for the Exchange of Product Model Data) which is composed of AP 215 (Ship Arrangement), AP 216(Ship Hull Form), AP 218 (Ship Structure), has been developed more than last 10 years and it is now at the stage just before IS(International Standard). It is expected that ship STEP would be used for the seamless data exchange among various CAD/CAM/CAE systems of shipbuilding process. In this paper the huge and complicated data structure of ship STEP is briefly reviewed at the level of ARM(Application Reference Model) and some abstract test cases which will be included as part of the standards are introduced. Basically ship STEP has common data model to be used without losing compatibility among those three different ship AP's, and it is defined as the modeling framework. Typical cases of data exchange during shipbuilding process, such as hull form data exchange between design office and model basin, midship structure data between shipbuilding yard and classification society are reviewed and STEP physical data are generated using commercial geometric modeling kernel. Test cases of ship arrangement at initial design stage and hydrodynamic data of crude oil carrier are also included.

• 대한조선학회논문집
• /
• 제47권5호
• /
• pp.751-756
• /
• 2010

The rapid growth of IT technology has enabled ship automation systems to gain better functionality and safety with reduced costs and crew numbers. Nowadays, the remote maintenance services for the systems are required because a ship may be located in a very remote area. To provide the remote maintenance services, some issues such as how to collect the ship automation systems data, how to monitor a ship's data from onshore offices, how to get support from experts while sailing, and how to reduce the maintenance costs, should be addressed. In this paper, we propose a remote ship maintenance system for remote monitoring and diagnostics of ship automation systems, which is based on both a ship area network to integrate separate system networks and a ship-shore communication infrastructure to support a remote access using satellite communications. Finally, we present the function test to verify the applicability of the proposed system.

• 한국항공우주학회지
• /
• 제44권10호
• /
• pp.862-870
• /
• 2016

선박의 안전한 운항과 자동입출항을 관리하기 위해서 사용되는 선박위치 발신장치(AIS, V-PASS)는 모든 선박에 의무적으로 장착하는 표준장비이다. 선박위치 발신장치를 활용한 선박식별 시스템을 항공기에 탑재하여 대형 어업지도선이나 경비함 등의 선박 및 지상 시스템에서 선박식별정보를 수신할 수 있게 되면 해양감시와 재난대응을 신속하게 수행할 수 있다. 본 논문은 항공기용 통합 선박식별 장치를 활용한 선박식별 및 도시 시스템의 개발 및 비행시험결과와 향후의 활용방안에 대해 기술하였다.

• 수산해양기술연구
• /
• 제44권1호
• /
• pp.57-67
• /
• 2008

Recently, Korean shipbuilding industry is keeping up the position of world wide No. 1 in world shipbuilding market share. It is caused by endless efforts to develope new technologies and methods and fast development of IT technologies in Korea, to raise up its productivities and efficiency in shipbuilding industry with many kinds of optimizing methods including genetic algorithm or artificial life algorithm... etc. In this paper, we have suggested the artificial life algorithm with relay search micro genetic algorithm. and we have improved a defect of simple genetic algorithm for its slow convergence speed and added a variety of solution candidates with applying relay search simple genetic algorithm. Finally, we have developed intelligent agent system for ship CAE modeling. We have tried to offer some conveniences a ship engineer for repeated ship CAE modeling by changing ship design repeatedly and to increase its accuracy of a ship model with it.