• 제목/요약/키워드: ocean architecture

검색결과 3,795건 처리시간 0.025초

Development of a system architecture for an advanced autonomous underwater vehicle, ORCA

  • Choi, Hyun-Taek;Lee, Pan-Mook
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2004년도 ICCAS
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    • pp.1791-1796
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    • 2004
  • Recently, great improvements have been made in developing autonomous underwater vehicles (AUVs) using stateof- the-art technologies for various kinds of sophisticated underwater missions. To meet increasing demands posed on AUVs, a powerful on-board computer system and an accurate sensor system with an well-organized control system architecture are needed. In this paper, a new control system architecture is proposed for AUV, ORCA (Oceanic Reinforced Cruising Agent) which is being currently developed by Korea Research Institute of Ships and Ocean Engineering (KRISO). The proposed architecture uses a hybrid architecture that combines a hierarchical architecture and a behavior based control architecture with an evaluator for coordinating between the architectures. This paper also proposed a sensor fusion structure based on the definition of 4 categories of sensors called grouping and 5-step data processing procedure. The development of the AUV, ORCA involving the system architecture, vehicle layout, and hardware configuration of on-board system are described.

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담수화 설비 스프레이 노즐에 대한 실험적 연구 (An Experimental Study of Spray Nozzle Desalination Facility)

  • 신현경;주현태;박민호;박경민;김진영;임진영
    • 한국해양공학회지
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    • 제20권1호
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    • pp.26-31
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    • 2006
  • Experimental research was undertaken to develop a domestic spray nozzle used on equipment for desalination. First, we made a test set-up in order to confirm nozzle efficiency of spray and distribution under different pressure conditions. Then, we found a maximum spray condition after verifying reliability of this facility. An optimum arrangement of the nozzle, based on the test result, was made using CATIA V5 and EXCEL.

Effect of the Turret's Rotational Damping on the Heading Stability of a Turret-Moored FPSO

  • Min, Soo Young;Park, Sung Boo;Shin, Seong Yun;Shin, Da Gyun;Jung, Kwang Hyo;Lee, Jaeyong;Lee, Seung Jae;Han, Solyoung;Chun, Yun Suk
    • 한국해양공학회지
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    • 제34권5호
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    • pp.304-315
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    • 2020
  • The main features of offshore turret platforms are station-keeping and weathervaning functions. Due to the complexity of the yaw motion, abundant research is being done to verify the factors that affect the heading stability. Simulations are used for studies that are not possible with experiments, but the conditions must be verified using experimental results. This study presents methods to estimate turret-related parameters such as the rotational stiffness and rotational damping. A time series analysis was performed, and the results showed that the calculation using the obtained parameters agreed well with experimental results.

Extreme Value Analysis of Metocean Data for Barents Sea

  • Park, Sung Boo;Shin, Seong Yun;Shin, Da Gyun;Jung, Kwang Hyo;Choi, Yong Ho;Lee, Jaeyong;Lee, Seung Jae
    • 한국해양공학회지
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    • 제34권1호
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    • pp.26-36
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    • 2020
  • An extreme value analysis of metocean data which include wave, wind, and current data is a prerequisite for the operation and survival of offshore structures. The purpose of this study was to provide information about the return wave, wind, and current values for the Barents Sea using extreme value analysis. Hindcast datasets of the Global Reanalysis of Ocean Waves 2012 (GROW2012) for a waves, winds and currents were obtained from the Oceanweather Inc. The Gumbel distribution, 2 and 3 parameters Weibull distributions and log-normal distribution were used for the extreme value analysis. The least square method was used to estimate the parameters for the extreme value distribution. The return values, including the significant wave height, spectral peak wave period, wind speed and current speed at surface, were calculated and it will be utilized to design offshore structures to be operated in the Barents Sea.

Experimental Study in Kinematics of Rogue Wave

  • Choi, Hae-Jin;Jung, Kwang-Hyo;Suh, Sung-Bu;Lee, Seung-Jae;Jo, Hyo-Jae;Choi, Han-Suk
    • 한국해양공학회지
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    • 제25권3호
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    • pp.11-18
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    • 2011
  • The rogue wave was generated in a two-dimensional wave tank the rogue wave kinematics was investigated including local and convective accelerations of the water particle and verification of existing prediction methods. PIV technique was applied to measure the wave kinematics near the wave crest which extended to compute the local and convective accelerations. The experimental results were compared with several analytical predictions. The convective acceleration under the crest of rogue wave has a similar magnitude with the local acceleration.

강제 입수에 의한 슬래밍 현상에 관한 실험적 연구 (An Experimental Study on Slamming Phenomenon by Forced Impact)

  • 남종오;강효동;정장영;권순홍;최한석
    • 한국해양공학회지
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    • 제21권1호
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    • pp.40-44
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    • 2007
  • This paper presents the experimental results on slamming phenomenon. The air pressure cylinder was used to ensure repeatability of the impact. The results showed that the adopted experimental technique was excellent in terms of repeatability, compared to that of the free drop tests. The pressure time histories, magnitude of peak pressure and the behavior of jetspray were obtained. The flat specimen was tested for various incident angles. To estimate the incident speed of the specimen, a high-speed camera was used. The high-speed camera was also a useful tool in understanding the behavior.

슬래밍 현상 실험에 공기압 실린더의 사용 가능성에 관한 연구 (Feasibility study of usage of air pressure cylinder on slamming experiment)

  • 정두진;박준수;권순홍;백승우;정장영
    • 한국해양공학회:학술대회논문집
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    • 한국해양공학회 2002년도 추계학술대회 논문집
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    • pp.229-233
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    • 2002
  • This paper presents the results of slamming experiment using air pressure cylinder to increase the repeatability of the experiment. When it comes to the slamming experiment, the traditional way of doing it has been the free fall experiment. By adopting air pressure cylinder almost equal peak pressures were obtained with that of free fall experiment. Therefore, the air pressure cylinder can be an alternative tool in slamming experiment.

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