• Journal of Advanced Marine Engineering and Technology
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• v.35 no.6
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• pp.829-834
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• 2011

This paper introduces a new system which measures abrasion quantity of cylinder liners of large-scale marine diesel engines. The proposed system consists of three parts; measurement part where an LVDT, a temperature sensor, a camera and LED for lighting control are installed, monitoring part which accomplishes measurement command transmission and monitoring based on PC or notebook, and master control part which controls the measurement part and transfers measurement data to the monitoring part. The accuracy of the developed system is compared with that of an internal micrometer with 1/100 mm accuracy.

• Journal of Environmental Impact Assessment
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• v.8 no.4
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• pp.47-57
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• 1999

This study is aimed at the development of comprehensive environmental management system, which can be operated on the basis of world wide web, as a topic of G7 project. Even though there should be lots of works remaining to achieve this goal, preliminary products can be summarized as follows : 1) integrated environmental information management system, 2) web based control engine, 3) surface water environment management system, 4) subsurface water environment management system, 5) sewer and waterworks management system. The core methodology of the engine is the generalized multidimensional finite element matrices to depict the terms in the analysis of various partial differential equations. Spatial information management system (ArcView) and Visual Basic were extensively employed to construct GUI oriented web based engine. The developed systems were composed of very intense computer codes due to the necessity of combinatory management of environmental problems. The web based engine could be served as a decision tool for the integrated management of environmental projects in Korea.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.5
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• pp.134-140
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• 2015

A control program of an engine control module (ECM) was developed, and its control performance was verified on a 750Ps marine diesel engine. The control method was designed for an engine rotational speed control system. For ECM hardware, the commercial rapid control prototype (RCP) ECM was used. The programming tool for control algorithm development was the MatLab/Simulink. The main control algorithm assembled many control models as engine cranking, run, and stall. Each model has sub-models to input/output control signals. The target engine speed was input signal from a speed control lever, and control output signal of the ECM was sent to the unit-injectors for fuel injection. The engine test was performed under various conditions of engine rotational speeds and dynamometer loads. The test results show that the control function of the ECM is suitable for electrical marine diesel engines.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.9
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• pp.1808-1817
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• 2017

Duties required for naval ship such as anti-submarine, anti-ship, and supply, etc are diversified, so the ECS (Enfineering Control System) is required for executing the mission effectively. The ECS monitors and controls the propulsion system in order that naval ship can perform the mission. As the in-country development of ECS is progressed, a test system for ECS is needed, and a naval ship propulsion system simulator based on CODOG was developed on this study. The naval ship propulsion system simulator based on CODOG which is divided into gas turbine model, diesel engine model, reduction gear model and controllable pitch propeller model, simulates to feedback of control commands of ECS. As a result of the experiment, it is able to confirm speed, torque and power, etc. of the gas turbine, diesel engine and shaft according to ECS propulsion mode.

• Journal of the Korean Society of Propulsion Engineers
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• v.7 no.3
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• pp.22-29
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• 2003

The propulsion feeding system of KSR-III is composed of tubes, valves and PSC, and controls the flow of propellant entering to engine. The test of PTA-I is carried out to verify the characteristic of propulsion feeding system and component. The tests of operation characteristic of component, hydraulic characteristic of tubes, flow control using venturi, oscillation of dynamic pressure, characteristic of regulator are carried out. Troubles of component are found out, and renewed, and the performance of the propulsion feeding system is verified through PTA-I. The results of PTA-I are used to the configuration of propulsion feeding system and test of PTA-II.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.11a
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• pp.613-615
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• 2009

This paper is to introduce Hanwha Aerospace R&D Center's development status of TVC(Thrust Vector Control) system and control valves for Korean space launch vehicles. With the successful development of KSR-III TVC system, Hanwha have developed TVC system and RCS control valves for KSLV-I. Also, in the advance research area of KSLV-II, Hanwha have participated in LOx and fuel flow control valves and LOx shut-off valve development in the engine supply system. Based on the accumulated experiences and technologies in the aerospace key components and system development, Hanwha will make an important contribution to KSLV-II development in the future.

• Proceedings of the KAIS Fall Conference
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• 2011.12b
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• pp.421-424
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• 2011

연비절감 및 조향감 향상을 위한 EHPS 시스템은 엔진 동력 기반의 HPS(Hydraulic Power Steering)시스템과는 달리 탈 엔진형 조향 기술로써 동력원인 BLDC 모터, 고압펌프 일체형 모듈, 상용 HPS 시스템의 기본 유압회로, 조향계 시스템 및 BLDC 모터를 제어하고 최적 조향력을 생성하기 위한 로직이 포함된 ECU로 구성되며. 주요구성 모듈은 펌프부, 모터부, 제어부로 분류된다. 본 논문에서는 펌프부의 외접형 Gear펌프의 시제품 제작하였고 구동토크 측정실험의 Data를 통해 기존 EHPS용 Gear펌프와 비교평가를 하였다.

• Proceedings of the Korea Multimedia Society Conference
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• 1998.10a
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• pp.95-99
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• 1998

대부분의 정보는 시간 제약을 가지므로 사용자는 필요 정보를 일정 시간 내에 얻어야만 한다. 시간적 제약을 가진 정보를 적절하게 서비스하려면 분산된 정보를 실시간에 검색하고 서비스해 주는 실시간 검색시스템이 필요할 뿐 아니라, 필요에 따라 실시간으로 검색시스템의 정보를 갱신해 주어야 한다. 본 논문에서는 인터넷을 이용한 지역 특성에 맞는 인터넷 정보 시스템 모델을 제안하고, 지역정보망을 위한 실시간 제어 검색엔진을 설계 및 구현하였다. 따라서 분산되어 있는 정보를 쉽게 모아서 갱신해 줄 수 있는 지능적인 로봇의 구현과 주기적으로 네트워크의 부하를 모니터링하고 모니터링한 데이터를 기반으로 로봇의 동작 정책을 수립하여 전체 시스템의 성능을 향상시킬 수 있는 실시간 로봇제어 정책이 가능하다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.304-306
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• 2001

ACE2000 MPLS 시스템은 대용량 국가 교환시스템으로 사용하기 위해 개발한 ACE2000 ATM 교환시스템에 Ships-in-the-night 모드 형태로 MPLS 기능을 추가함으로써 사용자들에게 차별화 된 서비스를 제공할 수 있는 시스템이다. MPLS 시스템에서는 채널 사용의 유연성과 채널 자원의 효율적인 사용을 위해 VC 머징 기능을 요구하고 있다. ACE2000 MPLS 시스템에서는 고성능 SAR 소자를 이용하여 VC 머징 모듈을 개발하여 사용하고 있다. VC 머징 기능을 위해서는 고성능 SAR로 구성되어 있는 입력부로부터 패킷을 받아들여 채널 연결설정 정보에 따른 VC 머징 제어기의 패킷 처리 후 또 하나의 고성능 SAR로 구성되어 있는 출력부로 전달하여야 만다. VC 머징 제어기에서는 머징 수신부로부터 UTOPIA-2 인터페이스를 통해 패킷을 받아들여 일반 AAL-5 데이터 패킷, 포워딩 엔진 제어 및 PPP 제어 등틀 위한 EFC 패킷 그리고, 순수 ATA 셀로 구분/저리한 후 UTOPIA-2 인터페이스를 통해 머징 송신부로 보내고 있다. 본 논문에서는 ACE2000 MPLS 시스템에 도입된 VC 머징 기술에 대한 내용으로서 고성능 SAR 소자를 이용한 VC Merger의 핵심 기술인 VC머징 제어기 설계기술에 대하여 언급하였다.

• 제어로봇시스템학회:학술대회논문집
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• 1990.10a
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• pp.675-680
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• 1990

According to the recent increase of demands for multi-function and economics on hydraulic excavator, it is required that excavator should have simple operation, higher and operational efficiency. However, it is difficulty for current hydraulic system to satisfy demands fully. This study shows that new control system improves power transmission efficiency, work capability of engine and hydraulic system of current excavator.