• 한국지능시스템학회논문지
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• 제18권6호
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• pp.821-825
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• 2008

본 논문에서는 전기로에 투입되는 합금철의 중량을 보다 정밀하게 제어하기 위하여 Mamdani 타입의 퍼지 알고리듬을 적용하였다. 고안된 퍼지 시스템은 중량 오차 및 변화를 입력으로 하고 합금철 투입 바이브레이터의 진동의 크기를 출력으로 하며, programmable logic controller의 래더 프로그램으로 구현하여 현장에 적용하였다. 현장에 적용된 퍼지 제어 알고리듬은 기존의 온-오프 제어기에 비하여 전기로에 투입되는 합금철의 계량 정밀도를 높였을 뿐 아니라, 합금철 투입 시간도 크게 단축시켰다.

• 한국전기전자재료학회논문지
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• 제22권5호
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• pp.382-385
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• 2009

In this study, we studied switching characteristics of germanium selenide(Ge-Se)/silver(Ag) contact formed by photodoping for use in programmable metallization cell devices. We have been investigated the switching characteristics of Ag-doped chalcogenide thin films. Changed resistance range by direction of applied voltage is about $1\;M{\Omega}$ $\sim$ hundreds of $\Omega$. The cause of these resistance change can be thought the same phenomenon such as resistance variation of PMC-RAM. The results imply that the separated Ag-ions react the atoms or defects in chalcogenide thin films.

• 한국정보처리학회논문지
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• 제1권4호
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• pp.438-451
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• 1994

프로그램 가능한 논리제어기(PLC : Programmable Logic Controller)의 활용을 위 한 낮은 복잡성과 결함탐색 기능을 갖는 컴퓨터 구조를 설계하였다. PLC의 반복적인 운영모드와 명세단계, 응용분야에 따라 표준화한 소프트웨어 기능모듈들의 상호연결 을 기본으로 하는 그래픽 프로그래밍 패러다임(paradigm)이 구조적으로 지원된다. 그러므로 설계과정에서 프로그래밍 단계와 가장 단순하면서도 엄격한 Diverse Back Translation 방법에 의해 응용소프트웨어의 안전성 인증을 가능케하는 컴퓨터 실행 (machine execution) 단계 사이의 의미상 격차(semantic gap)가 제거된다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 춘계학술대회 논문집
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• pp.427-432
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• 2003

The control method of programmable dynamometer for overall test of machine is to load the reference torque which is computed from torque transducer into motor under test. But the torque information detected from torque transducer have a lot of noise when the load torque of moter is a small quantity or changing. Thus, torque transducer must have a low pass filter to detect a definite torque information. But The torque delay generated by filter with torque transducer occur a torque trouble for meter torque of programmable dynamometer. The proposed system improved the problem of the torque measuring delay with torque transducer, and the load torque is estimated by the minimal order state observer based on the torque component of the vector control induction meter. Therefore, the torque controller is not affected by a load torque disturbance.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제49권8호
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• pp.551-556
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• 2000

A zero-voltage-switching(ZVS) programmable power supply employing the ZVS active clamp forward converter is suggested. Through the analysis on operation region of the supply, the constant power region and the maximum current limit region are clearly identified. Furthermore, the duty ratio range corresponding to the variation range of the output voltages and the control scheme at the minimum duty ration region are presented. Finally, in order to vefity the validity of the operation for the proposed power supply, experimental evaluation results obtained on an 1kW prototype power supply for the 198~242VAC input voltage range(220VAC$\pm$10%), the 0~25V output voltage range, and the 100kHz switching frequency are presented.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
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• pp.279-283
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• 1987

In this paper an intelligent supervisory programmable controller for automatic assembly machine is developed. This is achieved by adding sequence control hardware with input-interrupts to supervisory real time language and also by incorporating an automatic planning method which uses a predicate logic model and an action model. The designed intelligent supervisory programmable controller is applied to Die Bonding Machine and is to found to work well.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 B
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• pp.1108-1110
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• 2003

The control method of programmable dynamometer for overall test of machine is to load the reference torque which is computed from torque transducer into motor under test. But the torque information detected from torque transducer have a lot of noise when the load torque of meter is a small quantity or changing. Thus, torque transducer must have a low pass filter to detect a definite torque information. But The torque delay generated by filter with torque transducer occur a torque trouble for meter torque of programmable dynamometer. The proposed system improved the problem of the torque measuring delay with torque transducer, and the load torque is estimated by the minimal order state observer based on the torque component of the vector control induction moter. Therefore, the torque controller is not affected by a load torque disturbance.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.2039-2041
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• 2001

According to the deregulation of governments in the world, the power industries of United State and European nations are proceeding remote meter reading and remote load control. But the core technology of multifunctional electronic meter implemented by programmable one-chip IC, which can be the right answer of ail the power industy's efforts is now still under development in the advanced countries. Implementation of smallest size, lowest price three-phase meter with features which enable distribution automation such as bidirectional communication. The three phase metering IC and meter can be used as metering, automatic meter reading and transformer monitoring. Prepayment billing system.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2010년도 제39회 하계학술대회 초록집
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• pp.185-185
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• 2010

Programmable Metallization Cell (PMC) Random Access Memory is based on the electrochemical growth and removal of electrical nanoscale pathways in thin films of solid electrolytes. In this study, we investigated the nature of thin films formed by the photo doping of copper ions into chalcogenide materials for use in programmable metallization cell devices. These devices rely on metal ions transport in the film so produced to create electrically programmable resistance states. The results imply that a Cu-rich phase separates owing to the reaction of Cu with free atoms from chalcogenide materials.

• 전기전자학회논문지
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• 제23권2호
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• pp.487-494
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• 2019

본 논문에서는 토양에 침투하는 미세먼지의 영향을 피하여 폐쇄된 공간에서 물과 배양액을 이용하는 IOT(Internet of Things) 기반의 수경재배 식물공장을 제작하고, PLC(Programmable Logic Controller) 제어 방법을 제안한다. 제작된 수경재배 식물공장은 터치스크린과 스마트폰을 통하여 산소의 농도, 양액의 농도, 온도, 습도의 정도를 모니터링 하고, 히터 및 쿨러제어, 환풍기 및 제습장치 제어, LED의 파장 등을 사용하여 식물이 적정한 환경에서 성장할 수 있도록 제어한다.