• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2021년도 추계학술대회
• /
• pp.205-205
• /
• 2021

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2004년도 Asia Navigation Conference
• /
• pp.96-101
• /
• 2004

Core competence of enterprises became the focus of many researches recently. This essay summarizes the situation of Chinese harbor enterprises and establishes an evaluating model which makes use of factor-analysis.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2010년도 추계학술대회 논문집
• /
• pp.745-746
• /
• 2010

• 해양환경안전학회지
• /
• 제21권3호
• /
• pp.259-265
• /
• 2015

It is clearly understood that e-navigation is beneficial to prevent collision and grounding of ships. The purpose of this study is to define and present a future ship operation system under the e-navigation environment in order to provide clear direction for the design of Korean e-navigation system. The future ship operation system consists of shipboard navigational system, shore supporting system and maritime communication system. To achieve the objectives of this study, the ship operation system was discussed separately into SOLAS ships and non-SOLAS ships in this study. In SOLAS ships, mariners become a system manager, choosing system presets, interpreting system output, and monitoring vessel response. In small ships and fishing vessels, mariners may enjoy their navigation by using the automatic tracking of ship's position on the portable electronic chart display. The improved bridge design, integrated and harmonized navigational system and single window reporting will reduce significantly the administrative and physical workload of mariners. Mariners can concentrate their attention more on navigational duty under the e-navigation environment. To build an effective Korean e-navigation system, the essential navigational functions and e-navigation services for small ships and fishing vessels must be identified and developed taking into account user needs.

• 한국항행학회논문지
• /
• 제27권1호
• /
• pp.50-56
• /
• 2023

관성항법장치는 내장된 관성센서만을 이용하여 외부의 도움 없이 항체의 가속도 및 각속도를 이용하여 항법 정보를 계산한다. 하지만, 장시간 운용 시 관성항법장치는 시간이 지남에 따라 오차가 누적되어 항법 성능이 저하된다. 이러한 관성항법장치의 누적 오차를 줄이기 위하여 관성센서조립체를 일정한 절차로 회전시켜 관성센서 오차가 회전을 통해 상쇄되도록 항법 성능을 개선 시키는 연구가 활발히 진행되고 있다. 본 논문에서는 2축 회전형 관성항법장치의 성능에 영향을 미칠 수 있는 오차 요소를 식별하고 각 오차가 항법 성능에 어떠한 영향을 미치는지 분석하였다. 오차 분석 수행 후 시뮬레이션을 통해 관성항법장치의 항법 성능분석 결과를 제시하였다.

• 로봇학회논문지
• /
• 제18권4호
• /
• pp.472-480
• /
• 2023

This paper describes the development of a test-equipment for the pre-verification of navigation performance in cluster-based AUVs (Autonomous Underwater Vehicle). In the development of an AUV, conducting hardware and software development sequentially is not efficient due to the limited research and development period. Therefore, in order to reduce the overall development time and achieve successful development results, it is essential to pre-validate the navigation system and navigation algorithms. Accordingly, this paper explains the test-equipment for pre-verification of navigation performance, and ultimately confirms the stability of the navigation system and the performance of the navigation algorithms through the analysis of five types of navigation sensor data stored during real-sea experiments. The results demonstrate that through the development and verification of the test-equipment, it is possible to shorten the overall development period and improvement of product quality in the process of developing multiple AUVs.

• Journal of Positioning, Navigation, and Timing
• /
• 제5권4호
• /
• pp.203-211
• /
• 2016

A Satellite Based Augmentation System (SBAS) is a system that provides positioning information with high and accurate reliability to users who require ensuring high safety such as airplane taking off and landing. A continuous performance evaluation on navigation safety facilities shall be performed to determine whether developed systems meet the required performance before and after the operation. In this paper, SBAS position domain analysis is discussed in relation to analysis items for performance evaluation. The performance evaluation on the SBAS in the position domain shall conduct analysis on accuracy, integrity, continuity, and availability, which are items in the required navigation performance (RNP). In the paper, position domain analysis was conducted with regard to the Wide Area Augmentation System (WAAS) in the USA and the European Geostationary Navigation Overlay Service (EGNOS), which were developed already and now under operation. The analysis result showed that each of the systems satisfied the APV-I performance requirements recommended by the International Civil Aviation Organization (ICAO) with regard to daily data. It is necessary to verify using long-term data, whether the performance requirements in the RNP items are satisfied for system certification.

• 한국항해항만학회지
• /
• 제37권3호
• /
• pp.231-237
• /
• 2013

항해사들이 선박을 운항하는 과정에서 수행하게 되는 인지작업을 체계적으로 분석한다는 것은, 선교장비들의 개선, 교육훈련 방법의 개발, 잠재적인 인적오류의 추출 등 다양한 안전항해를 위한 방안들을 마련하기 위한 기초 작업이다. 항공기나 원자력발전 시설과 같이 인적오류에 대해 많은 연구가 수행되어온 분야에서는 인지작업을 분석하기 위한 다양한 분석기법들이 개발되었고, 개발된 기법들을 적용해 왔다. 그러나 해양분야에서는 아직까지 인지작업분석에 대한 연구가 미진한 편이다. 본 연구에서는 선박운항과정에서 수행하는 인지작업을 체계적으로 분석할 수 있는 하나의 인지분석방법을 제안하였다. 제안된 분석방법은 선박운항의 특성들을 반영하고, 인지작업에 영향을 미치는 다양한 요인들을 고려할 수 있도록 개발되었다. 한편 사례분석으로서 컨테이너선 충돌사례에서의 인지작업을 제안된 방법으로 분석하였다.

• 한국항공우주학회지
• /
• 제37권4호
• /
• pp.367-371
• /
• 2009

본 논문에서는 기존 연구결과들과 달리 비행체의 운동을 선형방정식으로 표현할 수 있다는 가정을 도입하지 않고 비례항법유도법칙의 최적성에 관한 해석 결과를 제시한다. 비례항법유도법칙은 비행체-표적 거리의 지수함수를 가중치로 갖는 제어 에너지를 최소화하는 최적의 유도법칙임을 비선형 방정식 기반으로 유도한다. 이때 가중함수의 지수와 비례항법상수와의 관계에 대해 설명한다. 또한 이러한 해석의 유효한 조건을 도출한다.

• 한국항해항만학회지
• /
• 제32권7호
• /
• pp.529-535
• /
• 2008

As a method to reduce collision accidents of ships at sea, this paper suggests an expert system for collision avoidance and navigation (hereafter "ESCAN"). The ESCAN is designed and developed by using the theory and technology of expert system and based on the information provided by AIS and RADAR/ARPA system. In this paper the ESCAN is composed of four(4) components; Facts/Data Base in charge of preserving data from navigational equipment, Knowledge Base storing production rules of the ESCAN, Inference Engine deciding which rules are satisfied by facts or objects, User System Interface for communication between users and ESCAN. The ESCAN has the function of real--time analysis and judgment of various encountering situations between own ship and targets, and is to provide navigators with appropriate plans of collision avoidance and additional advice and recommendation This paper, as a basic study, is to introduce the basic design and function of ESCAN.