• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 추계학술대회논문집 I
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• pp.498-498
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• 2001

Seismic qualification of the Main Control Boards for nuclear power plants has been performed with the guideline of AS ME Section III. US NRC Reg. Guide and IEEE 344 code. The analysis model of the Main Control Boards is consist of beam. shell and mass element by using the finite element method. and, at the same time. the excitation forces and other operating loads for each model are encompassed with respect to different loading conditions. As the fundamental frequencies of the structure are found to be less than 33Hz. which is the upper frequency limit of the seismic load, the response spectrum analysis using ANSYS is performed in order to combine the modal stresses within the frequency limit. In order to confirm the structural and functional integrity of the major components, modal analysis theory is adopted to derive the required response spectrum at the component locations. As all the combined stresses obtained from the above procedures are less than allowable stresses and no mechanical or electrical failures are found from the seismic testing, it concludes the Main Control Boards is dynamically qualified for seismic conditions. Although the authors had confirmed the structural and functional integrity of both Main Control Boards and all the component, in this paper only the seismic analysis of the Main Control Board is introduced.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문집
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• pp.204-209
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• 2002

A PDP(Plasma Display Panel) module consists of a discharge panel, a SMPS(Switched Mode Power Supply) for power supply, driving boards for panel control, and a logic board. Driving boards supply high voltage pulses to induce glow discharge in the PDP panel. The electrical pulses excite the circuit elements and subsequently generate acoustic noises. The main sources of the noise in the circuit are the transformer of SMPS and the power MOSFET(Metal Oxide Semiconductor Field Effect Transistor) of driving boards, and the heat sinks often amplify the noise level. The reduction of the acoustic noises was achieved by modifying both the structural and circuit elements. The structural method was executed by the improvement of heat sinks. The optimization of SMPS and condensers was carried out for the circuit elements.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.326.2-326
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• 2002

A PDP(Plasma Display Panel) module consists of a discharge panel, a SMPS for power supply, driving boards for panel control, and a logic board. Driving boards supply high voltage pulses to induce glow dischargein the PDP panel. The electrical pulses excite the circuit elements and subsequentlyacoustic noises. The main sources of the noise in the circuit are the transformer of SMPS and the power MOSFET of driving boards, and the heat sinks often amplify the noise level. (omitted)

• 한국ITS학회 논문지
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• 제5권3호
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• pp.24-28
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• 2006

본 논문에서는 메인 제어 보드에 연결되는 디바이스 모듈 보드들을 자동하는 인식하는 새로운 자동화 시스템을 설계 및 구현하였다. 본 논문의 시스템은 메인보드와 디바이스 모듈 보드로 나누어 설계하였으며, 메인보드에는 모듈보드와 연결할 수 있도록 슬롯 구조에 의해 설계되었다. 제안된 슬롯구조는 장착이 편리하고 기능의 추가 및 확장이 가능하도록 하였다. 또한 장치 보드들을 자동으로 인식함으로 통해 새로운 기존의 시스템을 업그레이드하거나 새로운 디바이스의 추가하는 등의 기능변경이 용이하도록 시스템을 설계 및 개발하였다. 본 논문에서 제안 된 시스템은 K10S1 PLC를 가지고 실험 및 검증하였다. 실험 분석 결과 제품의 기능향상에 드는 간 및 비용의 단축 효과가 나타났다.

• 한국정보통신학회논문지
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• 제20권6호
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• pp.1177-1182
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• 2016

모니터링과 제어를 위한 대다수의 산업용 장비들은 항상 확장성 문제와 외부 프로토콜 호환성 문제가 발생하고 있다. 본 논문은 이기종 통신이 발생하는 산업용 통신을 위한 모니터링을 지원하기 위하여 프로토콜 변환이 가능한 보드를 개발하였다. 산업용 통신 모니터링 보드는 메인 보드와 서브 보드로 구성되며, 메인 보드들의 연결로 확장이 가능하다. 메인 보드는 AVR계열의 Atmega 2560을 사용하였고, 서브 보드는 Atmega 256, 128을 사용하였다. 메인보드에는 RS485 시리얼 슬롯 4개를 배치하여 서브 보드를 장착할 수 있게 설계하였다. 서브보드는 아날로그와 디지털 데이터 I/O를 지원하고, CAN과 Ethernet 통신을 이용한 모니터링이 가능하도록 개발하였다.

• 정보통신설비학회논문지
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• 제8권1호
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• pp.30-35
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• 2009

In this paper, the type of inkjet heads and the control of head of inkjet printer are surveyed. The electronic parts of inkjet printer are composed of main- board and sub-board. The inkjet head is controlled by using these boards. The results from silver ink jetting experiment are given. The results show that the implemented inkjet system can give a satisfactory performance.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(5)
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• pp.243-246
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• 2002

This paper presents a study on the design and implementation of modulized I/O buffer control system for large capacity cable check. A 8bit I/O buffer basic module which has feedback loops with input and output buffers is simulated in PSpice and implemented with logic gates. This system is composed of 18 sub-boards which have 3 channels of 32bit data buses, and of a main board with MPC860 microprocessor.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 추계 학술논문 발표대회
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• pp.49-52
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• 2008

The present study was to develop a dry PFB method similar to the existing gypsum board construction method in order to apply the existing wet PFB method that uses fire-resistant adhesive. It was found that the existing wet method can produce concrete compressive strength of 80MPa and fire resistance of 3 hours with 30mm PF boards. The goal of development in this study was fire resistance of 3 hours through dry construction of 15mm fire-resistant boards. 1. Improved PF board was prepared by adding inorganic fiber to existing board and using aggregate with grain size of 3mm or less. Molding was done at temperature higher than that for existing PF board molding. While wet curing is used for existing PF boards, this study used dry curing in order to enhance heat insulation performance. 2. According to the results of fire resistance test, when the dry PF method was applied, the temperature of the main reinforcing bar was 116℃ in 15mm, 103.8℃ in 20mm, and 94℃ in 25mm, and these results satisfied the current standards for fire resistance control presented by the Ministry of Land, Transport and Maritime Affairs. When a 3-hour fire resistance test was performed and the external properties of the specimen were examined, the outermost gypsum board hardly remained and internal PF board maintained its form without thermal strain.

• 대한전기학회논문지:시스템및제어부문D
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• 제51권2호
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• pp.55-60
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• 2002

This paper presents a controller for the multiple DC motors using the CAN(Controller Area Network). The controller has a benefit of reducing the cable connections and making the controller boards compact through the network including expansibility. CAN, among the field buses, is a serial communication methodology which has the physical layer and the data link layer in the ISO's OSI (Open System Interconnect) 7 layered reference model. It provides the user with many powerful features including multi-master functionality and the ability to broadcast / multicast telegrams. When we use a microprocessor chip embedding the CAN function, the system becomes more economical and reliable to react shortly in the data transmission. The controller, we proposed, is composed of two main controllers and a sub controller, which have built with a one-chip microprocessor having CAN function. The sub controller is plugged into the Pentium PC to perform a CAN communication, and connected to the main controllers via the CAN. Main controllers are responsible for controlling two motors respectively. Totally four motors, actuators for the biped robot in our laboratory, are controlled in the experiment. We show that the four motors are controlled properly to actuate the biped robot through the network in real time.

• Journal of Electrical Engineering and Technology
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• 제10권6호
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• pp.2249-2255
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• 2015

The use of voltage source converter multi-terminal direct current (VSC-MTDC) systems is anticipated to increase from the introduction of wind farms and super grids in the near future. Effective control of the DC voltage in VSC-MTDC systems is an important research topic. This paper proposes a new dynamic reference-based voltage droop control to control the DC voltage in VSC-MTDC systems more effectively. The main merit of the dynamic reference-based voltage droop control is that it can reduce the steady-state error in conventional voltage droop control by changing references according to the system operating conditions. The performance of the proposed control was tested in a hardware-in-the-loop simulation (HILS) system based on the OPAL-RT real-time digital simulator and four digital signal processing boards.