• Title/Summary/Keyword: shipboard system

Search Result 129, Processing Time 0.03 seconds

A Study on the Analysis of Domestic Shipboard Disaster (5년간(′95~′99년)국내의 선원재해 현황에 관한 연구)

  • Jang, Seok-Ki;Yang, Weon-Jae;Park, Gyei-Kark;Lee, Chang-Hee;Nam, Jeong-Gil;Cheon, Dae-Il
    • Journal of Navigation and Port Research
    • /
    • v.26 no.3
    • /
    • pp.329-336
    • /
    • 2002
  • Recently, in the whole fields of industry including shipping business, the conception and importance of Human Factor is very highly and frequently emphasized. But the domestic crew disaster including injury and illness in our shipping business shows higher accident rate than other shipping countries. Therefore the developing of measures to prevent/reduce the accident is highly required as the marine accident including crew disaster causes enormous loss of property and human life in size and scale. But, because the domestic data regarding the crew accident are relatively insufficient and rule, the developing of those measures has many difficulties. Therefore, this study is to make the concerning data for the useful reference by showing the trend and current situation of crew accidents, assorted by the crew's rank, type of the accident, injured part of the body, cause of the accident, type of ships and type of the works when the accident occurred, by using the each ocean-going shipping company's recent 5 years('95∼'99) data in korea.

Condition Monitoring System: High Performance Wireless Measurement System (기계 상태 감시: 임베디드형의 고성능 무선 측정시스템)

  • Shim, M.C.;Yang, B.S.
    • Journal of Power System Engineering
    • /
    • v.11 no.1
    • /
    • pp.28-32
    • /
    • 2007
  • This research proposed that development of wireless condition monitoring system using WLAN network. It offers the prospect of improved performance that removed a current a coaxial cable and reduced overall cost of condition monitoring. Recently, there is an interesting concern for wireless system as an infrastructure technology construct ubiquitous computing environment in the future. High performance computing board makes minimization with integrate of a various functions which support wireless LAN network. Instead of wired coaxial cable using measurement system in industry, wireless LAN network assists industry automation and engineer's convenience. Developed system adapted wireless LAN network on shipboard with engine room and deck house, it also executes wireless measurement test on 8500TEU containership.

  • PDF

Knowledge-Based System for Optimum Propulsion Engine Selection of Ships (최적 박용엔진 선정을 위한 지식기반시스템)

  • Lee, Dong-Kon;Lee, Kyung-Ho;Lee, Kyu-Yeul;Lee, Chang-Euk
    • Journal of Korean Institute of Industrial Engineers
    • /
    • v.19 no.3
    • /
    • pp.3-10
    • /
    • 1993
  • The main propulsion system may be the most complicated of the shipboard systems. Many factors such as fuel economy, weight, space, first cost, reliability, vibration and noise must be considered when selecting the prime mover of the main propulsion system for ships. An expert system is a computer program that represents and reasons with knowledge of some specialist subject with a view to solving problems or giving advice. Recently, it is being developed increasingly with wider applications in many industries. This paper describes development of knowledge-based system for main engine selection of ships using general purpose expert system development tool, Nexpert Object. Developed system is consist of ship performance estimation module such as resistance and propulsion, data base for main engine, knowledge base for main engine selection in Nexpert Object and graphic user interface.

  • PDF

Shipboard Fire Evacuation Route Prediction Algorithm Development (선박 화재시 승선자 피난동선예측을 위한 알고리즘 개발 기초연구)

  • Hwang, Kwang-Il;Cho, So-Hyung;Ko, Hoo-Sang;Cho, Ik-Soon;Yun, Gwi-Ho;Kim, Byeol
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.24 no.5
    • /
    • pp.519-526
    • /
    • 2018
  • In this study, an algorithm to predict evacuation routes in support of shipboard lifesaving activities is presented. As the first step of algorithm development, the feasibility and necessity of an evacuation route prediction algorithm are shown numerically. The proposed algorithm can be explained in brief as follows. This system continuously obtains and analyzes passenger movement data from the ship's monitoring system during non-disaster conditions. In case of a disaster, evacuation route prediction information is derived using the previously acquired data and a prediction tool, with the results provided to rescuers to minimize casualties. In this study, evacuation-related data obtained through fire evacuation trials was filtered and analyzed using a statistical method. In a simulation using the conventional evacuation prediction tool, it was found that reliable prediction results were obtained only in the SN1 trial because of the conceptual and structural nature of the tool itself. In order to verify the validity of the algorithm proposed in this study, an industrial engineering tool was adapted for evacuation characteristics prediction. When the proposed algorithm was implemented, the predicted values for average evacuation time and route were very similar to the measured values with error ranges of 0.6-6.9 % and 0.6-3.6 %, respectively. In the future, development of a high-performance evacuation route prediction algorithm is planned based on shipboard data monitoring and analysis.

COMPUTATIONAL SIMULATION OF FIRE SUPPRESSION SYSTEM FOR CABINS OF SHIPBOARD ENCLOSURE (선박 거주구역용 소화시스템의 전산 시뮬레이션)

  • Jung, I.S.;Chung, H.T.;Han, Y.S.
    • Journal of computational fluids engineering
    • /
    • v.21 no.4
    • /
    • pp.40-45
    • /
    • 2016
  • The numerical simulation has been performed to predict the performance of the fire suppression system for cabin of shipboard enclosure. The present study aims ultimately at finding the optimal parametric conditions of the mist-injecting nozzles using the CFD methods. The open numerical code was used for the present simulation named as FDS (Fire Dynamics Simulator). Application has been done to predict the interaction between water mist and fire plume. In this study, the passenger cabin was chosen as simulation space. The computational domains for simulation in the passenger cabin were determined following the fire scenario of IMO rules. The full scale of the flow field is $W{\times}L{\times}H=4{\times}3{\times}2.4m^3$ with a dead zone of $W{\times}L{\times}H=1.22{\times}1.1{\times}2.4m^3$. The water mist nozzle is installed in ceiling center of 2.3 m height from the floor, and there are six mattresses and four cushions in the simulation space. The combination patterns of orifices to the main nozzle and the position to install nozzles were chosen as the simulation parameters for design applications. From the present numerical results, the centered-located nozzles having evenly combined orifices were shown as the best performance of fire suppression.

Harmonics Control of Electric Propulsion System using Direct Torque Control (직접벡터제어방식을 사용하는 전기추진시스템의 고조파 제어)

  • Kim, Jong-Su;Oh, Sae-Gin
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.13 no.12
    • /
    • pp.2618-2624
    • /
    • 2009
  • Harmonics (or distortion in wave form) has always existed in electrical power systems. It is harmless as long as its level is not substantial. However, with the recent rapid advancement of power electronics technology, so-called nonlinear loads, such as variable frequency drives for motor power/speed control, are increasingly finding their way to shipboard or offshore applications. In this paper a new approach to direct torque control (DTC) of induction motor drive is presented. In comparison with the conventional DTC methods the inverter switching frequency is constant and is dramatically increased, requiring neither any increase of the sampling frequency, nor any high frequency dither signal. The well-developed space vector modulation technique is applied to inverter control in the proposed DTC-based induction motor drive system, thereby dramatically reducing the current harmonics. As compared to the existing DTC approach with constant inverter switching frequency, the presented new approach does not invoke any concept of deadbeat control, thereby dramatically reducing the computations.

The use of network theory to model disparate ship design information

  • Rigterink, Douglas;Piks, Rebecca;Singer, David J.
    • International Journal of Naval Architecture and Ocean Engineering
    • /
    • v.6 no.2
    • /
    • pp.484-495
    • /
    • 2014
  • This paper introduces the use of network theory to model and analyze disparate ship design information. This work will focus on a ship's distributed systems and their intra- and intersystem structures and interactions. The three system to be analyzed are: a passageway system, an electrical system, and a fire fighting system. These systems will be analyzed individually using common network metrics to glean information regarding their structures and attributes. The systems will also be subjected to community detection algorithms both separately and as a multiplex network to compare their similarities, differences, and interactions. Network theory will be shown to be useful in the early design stage due to its simplicity and ability to model any shipboard system.

Design of a Shipboard Night Vision System (선박 Night Vision 시스템용 Pedestal의 제어부 개발)

  • Kim, Jung-Keun;Kim, Jong-Min;Park, Ki-Rang;Song, Se-Hun;Baek, Seung-Hun;Jin, Sang-Hun;Jung, In;Hwang, Seung-Wook;Jin, Gang-Gyoo
    • Proceedings of the Korean Society of Marine Engineers Conference
    • /
    • 2006.06a
    • /
    • pp.107-108
    • /
    • 2006
  • This paper presents the design of a night vision system for vessels. Both a hardware system and software modules for stabilization control are developed. In order to stabilize each control axis, the two-degree of freedom(TDF) PID controller is designed and its parameters are tuned using a real-coded genetic algorithm(RCGA). Simulation demonstrates the effectiveness of the proposed system.

  • PDF