• 수산해양기술연구
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• 제56권3호
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• pp.238-245
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• 2020

In this study, a motion control problem for the vessel towed by towing ship on the sea is considered. The towed vessel does not have self-control capabilities such that its course stability totally depends on the towing ship. Especially, in the narrow canal, river and congested harbor area, extreme tension is required during the towing operation. The authors, therefore, propose a new control system design method in which the rudder is activated to provide its maneuverability. Based on the leader following system configuration, a nonlinear mathematical model is derived and a backstepping control is designed. By experiment results with nonlinear control framework, the usefulness and effectiveness of the proposed strategy are presented.

• 환경영향평가
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• 제22권3호
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• pp.255-264
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• 2013

This paper diagnosed the assessment problems and development types of the simple statement of the Sea Area Utilization Consultation System. and suggested the key assessment items for system improvement. The major types of Public Water occupation and use, and distribution characteristic of regional and coastal were analyzed by evaluate 529 review items during 2010-2012. The artificial structure installation including harbor and fishing port facilities in the South and West coast, and seawater supply and drainage for land-based aquaculture and power plant were dominated. The checklists considering each types of occupation and use in Public Water were suggested. In addition, policy proposals for system improvement were suggested.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2018년도 공동국제학술발표회
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• pp.72-72
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• 2018

• 한국해안해양공학회:학술대회논문집
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• 한국해안해양공학회 2001년도 한국해안해양공학발표논문집 Proceedings of Coastal and Ocean Engineering in Korea
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• pp.172-175
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• 2001

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2000년도 Proceeding of CIN-KIN Joint Symposium 2000 on M.E.T. Under STCW 78/95 and SINO-KOREA MARITIME CONTACT IN MID-CENTURIES
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• pp.93-105
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• 2000

This paper describes prototype Virtual Reality Ship Simulator (VRSS) that we have recently developed next-generation training equipment based on the virtual reality (VR) technology. The inherent defects of conventional ship simulators are enormous costs and difficult system upgrade due to the system construction, such as large mock-up bridge system, wide visual presentations, In this paper, to cope with those problems, we explored VR technology that can give realistic environments in a virtual world. Then we constructed prototype VRSS system, which is, consists of PC-based human sensors, and Databases set having 3D object models and coefficients of Head Related Transfer Functions (HRTFs). 3D-WEBMASTER authoring tool was used as Virtual Reality Modeling Language (VRML). Using the VRSS system, we constructed Port an Passage Simulator for the harbor of INCHON in Korea, and Ship and Sea State Simulator for an arbitrary given sea environmental states by user. Through many simulation tests, we testified the efficiency of developed prototype VRSS by subject assessment with five participants. Then, we present results on the simulation experiments and conclude with discussion of evaluation results.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2000년도 학술발표회 발표논문집
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• pp.359-364
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• 2000

The paper presents the results of a study on the desired observing system which setting the high-level objectives for an integrated, sustained, national coastal observing system. Knowledge of the coastal zone is demanded by many constituencies, including fishermen, fisheries managers and climatologist, harbor pilots, coastal zone managers, environmental protection professionals etc. Many of these needs are being partially met by coastal zone observing system elements, both satellite and in situ. Nevertheless, these have not enough developed in an integrated manner and have been funded and operated to meet their own purpose. Thus, this study presents the development and application method for a national coastal zone observing system, which is integration of disparate observational systems and data sets to maximize their utility for many users and purposes.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2005년도 전력전자학술대회 논문집
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• pp.146-148
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• 2005

According as the industry develops recently, the import and export freight amount is increasing sharply, but physical distribution processing equipment ability had achieved conveyance, surge and setup of physical distribution by human's labor ability. But, inefficiency is indicated in operation of harbor and bay warehouse or physical distribution storage equipment because is ceilinged the processing physical distribution amount and the efficiency in physical distribution processing by these labor ability. Treatise that meet on the request proposes soldier warehouse physical distribution processing system that apply Vision System.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2507-2510
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• 2003

According as the industry develops recently, the import and export freight amount is increasing sharply, but physical distribution processing equipment ability had achieved conveyance, surge and setup of physical distribution by human's labor ability. But, inefficiency is indicated in operation of harbor and bay warehouse or physical distribution storage equipment because is ceilinged the processing physical distribution amount and the efficiency in physical distribution processing by these labor ability. Treatise that meet on these request proposes soldier warehouse physical distribution processing system that apply Vision System.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2004년도 춘계학술대회 논문집
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• pp.179-186
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• 2004

복잡한 수심을 가진 연안해역에서 파랑의 천수효과, 굴절, 회절, 부분반사, 해저마찰, 쇄파의 영향가지를 고려한 파랑모델의 도입은 대부분의 해안공학 설계나 방재 문제에 매우 중요한 요소이다. 파랑이 심해역에서 수심이 얕은 천해역으로 이동함에 따라, 파랑의 기본적 특성이 변하며, 파에너지는 천해역과 섬, 해안 보호 구조물, 불규칙한 연안 경계와 다른 지리적 특징에 의하여 파봉선을 따라 재분산된다. 또한, 쇄파가 발생하는 쇄파대에서나, 해안선 및 구조물의 경계에서터 반사된 파가 그 입사파와 상호 작용을 하는 영역을 통과하면서 급격한 변화를 일으킨다. 완경사방정식 파랑모델의 현장 적용은 지금까지 여러 모델이 다루지 못한 파랑변환과정을 이해하는데 도움을 줄 것이다. 본 연구에서는 영일만 신항만의 건설이 이루어질 영일만 내의 넓은 수역에 대해 파랑의 변환과정을 보다 합리적으로 해석하기 위해 확장완경사방정식 파랑모델을 구성하고, 신항건설 전,후의 해면변동과 신항만 개발에 따른 포항 구항해역 및 포항 신항해역 등 인접해역에서의 정온도 변화를 비교 분석하는 것을 골자로 하고 있다. 이러한 시도가 광역항만권 개발에서 쉽게 누락시킬 수 있는 기존항만에 대한 파생적 영향을 반드시 분석하도록 하는 계기가 될 것으로 본다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2005년도 추계학술대회 논문집
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• pp.117-124
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• 2005

최근 부산 신항만의 1단계 개발이 북 컨테이너 터미널쪽으로 가시적으로 나타나고, 12,000TEU 대형 컨테이너선을 서비스할 수 있도록 접근 수로 및 박지의 수심을 기존 15m 에서 18m로 준설작업을 통해 증심시킴과 아울러, 신항만의 웅동만 내 일부 수역을 매립하는 것으로 항만배후지 부분의 매립계획에 대한 수정이 논의되고 있다. 더구나 2003년 태풍 매미의 내습 이후 이곳 해역에서 항만구조물 설계의 기준이 되는 입사 파랑의 변화로 인해 각 부두에서의 극한파랑조건 및 항만 내 정온도에도 다소의 변화가 발생할 것으로 예상되어 각 부두에서의 정온도 분석이 뒤따라야 한다. 따라서 본 연구에서는 이들 변화에 대한 수치모델을 구성하고 실험을 수행한 후 현장 계측 자료와 함께 실험결과를 비교 하였으며, 아울러 유동장에 대해서도 검토하였다. 결과, 전반적으로 항만의 반응이 증가되는 편이나 우려할 수준에 이르지는 않았지만 일부 구간에서는 태풍내습 시 대비하여야 하는 경우도 발생하였다.