• Title/Summary/Keyword: 조종성능시험

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A Study on the Development of Maneuvering Mathematical Model and Maneuvering Simulation for a Mobile Harbor (모바일하버의 조종운동 수학모델 구축 및 조종 시뮬레이션 개발에 관한 연구)

  • Jeong, Jae-Hun;Lee, Seung-Keon;Lee, Chang-Hoon
    • Journal of Navigation and Port Research
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    • v.34 no.8
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    • pp.629-634
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    • 2010
  • Mathematical model of maneuvering motion for a Mobile Harbor is established and versatile applications to the special situations of maneuvering are attempted. The Mobile Harbor in this research has twin Azipod thruster and twin bow thruster. In order to predict the maneuverability of Mobile Harbor, a mathematical model was developed on the basis of MMG model, and some model test results were adopted for the simulation of Mobile Harbor. As a result, the turning motions of the Mobile Harbor were successfully calculated. and the optimal berthing system was completed.

구속모형시험을 통한 예선의 조종성능 추정 및 실선시운전결과 비교

  • Yun, Geun-Hang;Yeo, Dong-Jin;Kim, Yeon-Gyu
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2010.10a
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    • pp.128-130
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    • 2010
  • 예선과 부선으로 이루어진 예부선의 예인 운항 상태에 대한 수학모델을 개발하기 위하여, 먼저 예선에 대한 수학모델을 개발하였다. 이를 위하여 예선모형을 이용하여 4자유도의 수학모델에 대한 구속모형시험을 수행하였고, 그 결과를 이용하여 선회, 지그재그 시뮬레이션을 수행하였다. 또한 예선실선에 대한 예선시운전 실험을 통하여 선회, 지그재그 결과를 얻고, 이를 시뮬레이션 결과와 비교하여 예선의 수학모델을 검증하였다.

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A Simulator Study on Yaw-checking and Course-keeping Ability of Directionally Unstable Ships (침로불안정한 선학의 변침 및 보침 성능에 관한 시뮬레이터 연구)

  • Sohn Kyoungho;Lee Dongsub
    • Proceedings of KOSOMES biannual meeting
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    • 2003.11a
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    • pp.141-148
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    • 2003
  • Yaw-checking and course-keeping ability in IMO's ship manoeuvrability standards is reviewed from the viewpoint cf sole navigation Three kinds of virtual series-ships, which have different course instability, are taken as test models. The numerical simulation on Z-test is carried out in order to examine the correlation between known manoeuvrability in spiral characteristics and various kinds of overshoot angle. Then simulator experiments are executed with series-ships in a curoed, narrow waterway by six operators(five active pilots and one ex-captain) in order to examine the correlation between known manoeuvrability and degree of manoeuvring difficulty. IMO criteria for yaw-checking and course-keeping ability are discussed and revised criteria are proposed.

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간이 선박조종 시뮬레이터 개선에 관한 연구

  • Choe, Won-Jin;Jeon, Seung-Hwan
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2019.11a
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    • pp.257-258
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    • 2019
  • 이 연구는 기 개발한 간이 선박조종 시뮬레이터의 조종성능 개선에 관한 것이다. 선박조종 시뮬레이터에서 모델선박의 조종성 지수는 임의로 정하는 것이 아니라 가능한 모델대상선박의 실제 움직임과 동등하거나 유사하게 설정되어야 한다. 선행연구에서는 이미 발표된 대학교 실습선(한바다호)의 선박조종 실선데이터를 기반으로 모델선박의 조종성 지수를 도출하였으나, 타각이 10°를 초과할 경우 네 종류의 실선시험 결과와 평균 17.9%의 상대오차가 발생하였다. 이에, 타각 10°, 20° 및 35°에서의 한바다호 조종성 지수에 대해 에르미트 보간을 이용하여 3차 다항식을 산출하고, 이를 모델선박에 적용하였다. 그 결과 타각 35° 이내의 전 구간에서 조종성능의 상대오차가 평균 13.7%에서 11.6%로 약 2.1% 개선됨을 확인하였다.

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초경하상태 선박의 입항 제한 필요성 고찰

  • 강석용;이윤석
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2022.11a
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    • pp.152-153
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    • 2022
  • 2020년 4월 부산신항에서 발생한 밀라노 브리지 사고는 초경하상태 선박의 조종성능 저하에 대한 큰 관심을 일으켰다. 본 연구는 흘수가 과도하게 작은 상태의 선박의 조종성능 저하에 대한 기초연구로 진행되었다. 이를 위하여 다양한 문헌 검토, 실증시험 및 시뮬레이션테스트를 진행하였고, 흘수가 지나치게 작은 선박은 만재 상태에 비하여 선회권의 크기가 커지므로 이에 대한 주의가 필요하다. 각 도선구에서는 입항하는 선박의 흘수가 지나치게 작을 경우 이를 제한하는 규제 도입에 대한 검토가 필요할 것으로 사료된다.

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A Study on Estimation of the Course Keeping Ability of a Ship in Confined Waterways Using the MMG Model (MMG 모델을 이용한 제한수로를 운항하는 선박의 침로안정성능 추정에 관한 연구)

  • Kim, Hyunchul;Kim, In-Tae;Kim, Sanghyun;Kwon, Soo Yeon
    • Journal of Navigation and Port Research
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    • v.43 no.6
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    • pp.369-376
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    • 2019
  • Ship hydrodynamics in the confined waterways is challenging. When a ship is maneuvering in confined waterways, the hydrodynamic behavior may vary significantly because of the hydrodynamic interaction between the bottom of the ship hull and the seabed, or so-called shallow water effects. Thus, an accurate prediction of shallow water and bank effects is essential to minimizing the risk of the collision and the grounding of the ships. The hydrodynamic derivatives measured by the virtual captive model test provide a path to predicting the change in ship maneuverability. This paper presents a numerical simulation of captive model tests to predict the maneuverability of a ship in confined waterways. Also, straight and zig-zag simulation were conducted to predict the trajectory of a ship maneuvering in confined waterways. The results showed that the asymmetric flow around a ship induced by vicinity of banks causes pressure differences between the port and starboard sides and the trajectory of a ship maneuvering in confined waterways.

Hydrodynamic Forces and Maneuvering Characteristics of Ships at Low Advance Speed (저속시 선체에 작용하는 조종유체력 및 조종성능에 관한 연구)

  • Kyoung-Ho Sohn
    • Journal of the Society of Naval Architects of Korea
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    • v.29 no.3
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    • pp.90-101
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    • 1992
  • Some practical methods have already been proposed for predicting the characteristics of ship manoeuvring motions at relatively high advance speed. However, these methods can hardly be applied to motions of ships in starting, stoppint, backing and slow steaming conditions, even though such extensive motions are of vital importance from a safety point of view particularly in harbour areas. The method presented here aims at predicting the characteristics of ship manoeuvring at low advance speed, which covers starting, stopping, backing and slow steaming conditions. The force mathematical models at large angles of incidence to the hull as well as under the tilde range of propeller operations are formulated. Simulations of various manoeuvres at low advance speed are carried out for two types of merchant ship, i.e. a LNGC and a VLCC. Comparisons between simulations and corresponding full-scale measurements or free-running model tests provide a first verification of the proposed mathematical models.

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A Study on the Maneuverabilities and Full-Scale Measurement for Training Ship HANBADA (실습선 한바다호의 조종성능과 실선 계측에 관한 연구)

  • Jeong, Hae-Sang;Gug, Seung-Gi;Lee, Yun-Seok;Yun, Gwi-Ho;Moon, Beom-Sik
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2018.11a
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    • pp.12-13
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    • 2018
  • For navigation safety, navigators have to be familiar with maneuverabilities. When a vessel encounters a danger of collisions and stranding, maneuverability is essential for the safety of ship. It is composed of turning, course change, speed change, etc. In the latter part, maneuverabilities and motion of Training Ship HANBADA are provided by full-scale measurement in the $10^{\circ}/10^{\circ}$ Zig-Zag Test, $20^{\circ}/20^{\circ}$ Zig-Zag Test and Turning Circle Test(Port and Starboard). It aims to provide information on maneuverabilities and motion of Training Ship HANBADA so that the navigators can take proper action to avoid.

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Control Surface Fault Detection of the DURUMI-II by Real-Time System Identification (실시간 시스템 식별에 의한 두루미-II 조종면 고장진단)

  • Lee, Hwan;Kim, Eung-Tai
    • Aerospace Engineering and Technology
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    • v.6 no.2
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    • pp.21-28
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    • 2007
  • The goal of this paper is to represent a technique of fault detection for the control surface as a base research of the fault tolerant control system for safety improvement of UAV. The real-time system identification based on the recursive Fourier Transform was implemented for the fault detection of the control surface and verified through the HILS and flight test. The failures of the control surface are detected by comparing the control derivatives in fault condition with the normal condition. As a result from the flight test, we have confirmed that the control derivatives of fault condition less than normal condition.

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A Study on the Ship's Performance of T.S. HANBADA(III) - The Evaluation of Maneuvering Performance with Actual Ship Trials - (실습선 한바다호의 운항성능에 관한 연구(III) - 실선시험을 통한 조종성능 평가 -)

  • Jung, Chang-Hyun;Lee, Hyong-Ki;Kong, Gil-Yong
    • Journal of Navigation and Port Research
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    • v.32 no.6
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    • pp.439-445
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    • 2008
  • Various turning tests were carried out according to the rudder angle, turning direction, and the speed etc. with the ship's maneuverability measuring system on the training ship HANBADA. After that they were compared with each other on the turning circle, maneuvering performance index and the distance of new course, and then found out that they were satisfied with the IMO maneuvering standards. And the turning circles of port were smaller than those of starboard with all the rudder angles and maneuvering indexes such as K and T were relatively bigger than other vessels. Also, the distance cf new course was measured to $125{\sim}300m$ in case of the new course on $30^{\circ}{\sim}90^{\circ}$. All of these results will be helpful to escape from collision and to alter course on coastal voyage.