• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.235-235
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• 2003

• ICROS
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• v.19 no.3
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• pp.29-41
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• 2013

본 논문은 군이 장차 운용하게 될 무인체계 중 무인잠수정에 관련하여 미래 전장 환경을 고려한 필요성을 분석하고, 무인잠수정의 잠재적인 능력과 역할 국내 외 개발 현황 및 핵심 기술을 살펴보았으며, 끝으로 무인잠수정의 국내 개발 및 획득전략을 간략히 소개한다.

• Journal of Advanced Marine Engineering and Technology
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• v.39 no.6
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• pp.614-619
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• 2015

In this study, a dynamics model was developed to predict the motion performance of an Autonomous Underwater Vehicle (AUV). The dynamics model includes basic dynamic state variables of the hull and force terms to determine the motion of the AUV. The affecting terms for the forces are hydrostatic force, added mass, hydrodynamic damping, lift and drag forces. The force terms can be calculated using analytical and Computational Fluid Dynamics methods. For the underwater motion simulation, a simple PD controller was used. Also, the AUV was tested in a water tank and near sea for the partial verification of the fluid drag force coefficients and way-point tracking motions.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.69-70
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• 2001

음성 통신계를 통해서 전달되는 음성신호 품질의 좋고 나쁨을 수화자의 청각을 거친 반응(주관평가)에 의해 객관적으로 표현한 것을 통화품질이라 한다. 잠수기 어업 등과 같은 수중 활동에 사용할 무선수중전화기 시작품 설계와 최적의 통화품질 평가 방법 선점의 기초 자료로써 레저스포츠등에 인부 사용되고 있는 기존의 무전수중전화기로 수중 음성통신에서의 명료도와 단어 요해도를 측정하였다. (중략)

• The Journal of the Convergence on Culture Technology
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• v.8 no.3
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• pp.99-104
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• 2022

This study was to analyze the effects of sudden rise in cortisol and human symptoms in the situation of rescue at river, The experimental results are as follows. The subjects were A, B, C, and the values of cortisol elevation before and after diving were 6.30ug/dl, 6.50ug/dl, and 6.57ug/dl, respectively. However, in the subject D, the elevation of cortisol before and after diving was significantly elevated to 11.00ug/dl. The reason for this is thought to be the depletion of physical strength through weighty due to the inferiority of the underwater view and tense during the sudden rise. The subjects E showed significantly lower cortisol elevation before and after diving, as 4.28ug/dl, because the age of E was the youngest of the subjects and the anxiety was low due to abundant experience of deep sea diving. Fatigue is 7 to 8, anxiety is 7 to 9, Both showed high values. Psychological strain increased fatigue in underwater search, and poor visual field seemed to increase anxiety. The research results will be provided as empirical data on the safe underwater search activities of rescuers.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.74-76
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• 2023

해저공간을 인류의 삶의 터전으로 바꾸기 위해서는 거주자의 안전이 반드시 확보되어야 한다. 하지만 해저거주공간에서 발생할 수 있는 재난과 재난 발생 시 이루어지는 피난의 특성에 대해서는 연구가 적다. 그러므로 본 연구에서는 해저거주공간의 재난 및 피난 특성에 관해 연구를 진행한다. 현재 운용 중인 해저거주공간의 사례가 드물어 우선 수중공간에서 장기간 임무를 수행하는 잠수함의 사고 사례와 수중연구실로 운영되고 있는 수중해비타트의 사고 사례를 분석하여 해저거주공간의 재난 및 피난 특성을 도출한다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.7
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• pp.936-944
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• 2019

Submarines, which have been called an invisible force, are strategic underwater weapon systems that perform missions such as anti-surface warfare, anti-submarine warfare, and high payoff target strikes with the advantage of underwater covertness. A submarine should be able to withstand the hydrostatic pressure of the deep sea. In this respect, the submarine pressure hull, as the main structural system to resist the external pressure corresponding to the submerged depth, should ensure the survivability from hazards and threats such as leakage, fires, shock, explosion, etc. To do this, the initial scantling of the submarine pressure hull must be calculated appropriately in the concept design phase. The shape of the aft transition ring varies according to its connection with the submarine aft end conical structure, pressure hull cylindrical part, and non-pressure hull of the submarine; the design of the aft transition ring should not only take into account stress flow and connectivity but also the cost increase due to the increased man-hours of its complex geometry. Therefore, trade-off studies based on the four different shapes of the aft transition ring are carried out considering both the review of the structural strength through nonlinear finite element analysis (FEA) and economic feasibility by reviewing the estimations of the manufacturing working days and material costs. Finally, the most rational structural aft transition ring shape for a submarine amongst four reviewed types was proposed.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.171-171
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• 2003

• Journal of the KSME
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• v.51 no.3
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• pp.38-42
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• 2011

• 한국전기화학회:학술대회논문집
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• 2001.10a
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• pp.27-27
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• 2001