• 제목/요약/키워드: experimental modules

검색결과 603건 처리시간 0.03초

과학 탐구능력 향상을 위한 실생활 소재 모듈의 개발 (Development of Experimental Modules Using Everyday Life Materials to Enhance Science Process Skills)

  • 김수경;차희영;김중복
    • 한국과학교육학회지
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    • 제25권7호
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    • pp.754-764
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    • 2005
  • 이 연구는 증등학생의 탐구능력 향상을 위한 실생활 소재 탐구모듈 개발 연구이다. 실생활소재를 사용하여 물, 열, 빛, 운동, 물질과 관련된 물리내용으로 모듈을 구성하였는데, 각 모듈 당 4-6개의 관련 활동들이 포함되어 있고, 각 모듈은 학생용 실험서와 교사용 지도서로 구성되어 있다. 모듈을 현장 물리 교사에게 워크삽을 통해 모듈의 목표, 내용, 활용 측면에서 타당도 평가를 받았는데, 모듈의 목표 측면에서는 79%의 긍정적인 평가를 받았고, 내용 측면에서는 77%, 활용 측면에서는 71 %의 긍정적인 평가를 받아, 전체적으로 74 %의 긍정적인 평가를 받았으며, 모듈의 개선점, 보완점등의 설문을 바탕으로 수정보완하여 모듈을 완성하였다.

다계 H-브리지 모듈로 구성된 UPFC(Unified Power Flow Compensator)의 실험적 동작분석 (Experimental Operation Analysis of Unified Power Flow Controller with Cascaded H-Bridge Modules)

  • 백승택;배병열;한병문;백두현;장병훈;윤종수;김수열
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2005년도 전력전자학술대회 논문집
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    • pp.389-391
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    • 2005
  • This paper describes experimental analysis of UPFC, which is composed of cascaded H-bridge modules and single-phase multi-winding transformers for isolation. The operational characteristic was analyzed through experimental works with a scaled model, and simulation results with PSCAD/EMTDC. The UPFC proposed In this paper can be directly connected to the transmission line without series injection transformers. It has flexibility to expand the operation voltage by increasing the number of H-bridge modules. The analysis results can be utilized to design the actual UPFC system applicable for the transmission system.

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다계 H-브리지 모듈로 구성된 UPFC(Unified Power flow Compensator)의 실험적 동작분석 (Experimental Operation Analysis of Unified Power Flow Controller with Cascaded H-Bridge Modules)

  • 백승택;한병문;추진부;장병훈;윤종수
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제54권9호
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    • pp.422-430
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    • 2005
  • This paper describes experimental analysis of UPFC, which is composed of cascaded H-bridge modules and single-phase multi-winding transformers for isolation. The operational characteristic was analyzed through experimental works with a scaled model, and simulation results with PSCAD/EMTDC. The UPFC proposed in this paper can be directly connected to the transmission line without series injection transformers. It has flexibility to expand the operation voltage by increasing the number of H-bridge modules. The analysis results can be utilized to design the actual WFC system applicable for the transmission system.

Optimized Installation and Operations of Battery Energy Storage System and Electric Double Layer Capacitor Modules for Renewable Energy Based Intermittent Generation

  • Min, Sang Won;Kim, Seog Ju;Hur, Don
    • Journal of Electrical Engineering and Technology
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    • 제8권2호
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    • pp.238-243
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    • 2013
  • In this paper, a novel approach for optimized installation and operations of battery energy storage system (BESS) and electric double layer capacitor (EDLC) modules for the renewable energy based intermittent generation is presented for them to be connected with an electric power grid. In order to make use of not merely the high energy density of battery but also the high power density of EDLC modules, it is very useful to devise the hybrid system which combines BESS and EDLC modules. The proposed method adopts the linear programming to calculate the optimized capacity as well as the quadratic programming to transmit the optimal operational signals to BESS and EDLC modules. The efficiency of this methodology will be demonstrated in the experimental study with the real data of wind speed in Texas.

Implementation of Internet Based Control by Developing LonWorks Intelligent Control Modules

  • W.P. Hong;Park, W.G.
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.70.5-70
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    • 2001
  • This paper proposes a new Internet based control concept & design method and implementation of LonWorks network system for remote intelligent control. The experimental network system using i.LON Web server is designed and fabricated. It is also verified that the developed control modules with LonTalk protocol have available, interoperable, and reliable performance characteristics from the experimental results. Especially, the results provide a available technical data for remote home, building & plant automation control.

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축소한 155Mbps 송수신 모듈들의 공정도 (The Production Flow of Compact 155Mbps transmitter / receiver optical modules)

  • Kim, Sang-Kon;Eu, Jai-Hong
    • 한국광학회:학술대회논문집
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    • 한국광학회 1997년도 Advance Program of 14th optics andquantum Electronics conference, 1997제14 회 광학 및 양자전자 학술 발표회 논문 요약집
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    • pp.111-113
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    • 1997
  • The purpose of this paper is to propose a production flow for 155Mbps transmitter/receiver optical modules. Compact optical module packages for use as 155Mbps optical interfaces are developed by implementing a self-alignment principle for the formation of V-grooves and solder bumps. on the bases of experimental results of two hundreds of receiver/transmitter optical modules, each steps and flows of our production are developed by production efficiencies.

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복잡한 행동을 위한 셀룰라 오토마타 기반 신경망 모듈의 동적선택 (Dynamic Selection of Neural Network Modules based on Cellular Automata for Complex Behaviors)

  • 김경중;조성배
    • 대한전기학회논문지:시스템및제어부문D
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    • 제51권4호
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    • pp.160-166
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    • 2002
  • Since conventional mobile robot control with one module has limitation to solve complex problems, there have been a variety of works on combining multiple modules for solving them. Recently, many researchers attempt to develop mobile robot controllers using artificial life techniques. In this paper, we develop a mobile robot controller using cellular automata based neural networks, where complex tasks are divided to simple sub-tasks and optimal neural structure of each sub-task is explored by genetic algorithm. Neural network modules are combined dynamically using the action selection mechanism, where basic behavior modules compete each other by inhibition and cooperation. Khepera mobile robot simulator is used to verify the proposed model. Experimental results show that complex behaviors emerge from the combination of low-level behavior modules.

Labview를 이용한 배전용 폴리머애자의 누설전류 측정 및 분석 프로그램 개발 (Development of data acquisition and analysis program modules for leakage current of polymeric insulators using the Labview software)

  • 조성수;한상옥
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 C
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    • pp.1969-1971
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    • 2000
  • This paper presents a data acquisition and analysis program modules that has been developed using the Labview program. These program modules can use to acquire and analyze leakage current data of insulator under different contamination conditions. The experimental hardware made up salt fog chamber, AC/DC power supply, transducer (shunt resistor), measurement devices and PC with the GPIB (General Purpose Interface Bus). And analysis program modules can calculate pulse level count, accumulated charge, average leakage current, power spectrum, and harmonics. The result of applying these analytical program modules to polymeric insulator is available for evaluation of leakage current characteristic of outdoor insulators.

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건물 적용 유형별 BIPVT 집열기 열적 실험성능 비교 (The Thermal Performance Comparison of BIPVT Collector Applied on Roofs and Facades)

  • 강준구;김진희;김준태
    • 한국감성과학회:학술대회논문집
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    • 한국감성과학회 2009년도 추계학술대회
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    • pp.269-272
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    • 2009
  • The temperature of PV modules that integrated into building facades or roof increases that could reduce the electrical efficiency of the PV system. In order to incresae PV system's efficiency it is very important to remove the heat from the PV modules. For this purpose, hot air can be extracted from the space between PV modules and building envelope, and used for heating in buildings. The solar collector utilizing this thermal effect is called photovoltaic-thermal(PVT) solar collector. This paper compares the experimental performance of building-integrated PVT collectors that applied on building roof and facade. There are two different case: a roof-integrated PVT type and a facade-integrated PVT type. The experimental results show that the collected thermal energy of the roof-integrated type was 24% higher, compared to that of the facade-integrated.

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Experimental study on flexural strength of modular composite profile beams

  • Ahn, Hyung-Joon;Ryu, Soo-Hyun
    • Steel and Composite Structures
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    • 제7권1호
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    • pp.71-85
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    • 2007
  • This study suggests modular composite profile beams, where the prefab concept is applied to existing composite profile beams. The prefab concept produces a beam of desired size having two types of profile: side module and bottom module. Module section will improve construction efforts because it offers several benefits : reduction of deflections due to creep and shrinkage, which might be found in existing composite profile beams; increase in span/depth ratio; and free prefabrication of any required beams. Based on the established analysis theory of composite profile beams, an analysis theory of modular composite profile beams was suggested, and analysis values were compared with experimental ones. The behavior of individual modules with increase of load was measured with a strain gauge, and the shear connection ratio between modules was analyzed by using the measured values. As a result of experiment, it was found that theoretical flexural strength on condition of full connection was 57%-80% by connection of modules for each specimen, and it is expected that flexural strength will approximate the theoretical levels through further module improvement.