• Title/Summary/Keyword: Multi module

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A Study on Evacuee′s Risk Assessment under Ship′s Fire (선박화재의 인명안전평가 해석)

  • 양영순;정정호;이재옥;공수철;여인철
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2001.04a
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    • pp.241-247
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    • 2001
  • A Fire Safety Evaluation Module(FSEM), which quantitatively evaluates the risk of evacuees when fire occurs in buildings or ships, is presented in this paper. The developed FSEM can be applied to multi-room structure. Basic input data for the FSEM are prepared by fire model and evacuation model. CFAST which is one of the existing fire models is used as fire model and MonteDEM evacuation model was developed for evacuation model, respectively. MonteDEM evacuation model makes use of distinct element method and Monte-Carlo simulation, and it can also take into consideration ground inclination by ship motions in order to simulate the real situation of evacuation. Some typical situations are modelled for illustrative examples and quantitative assessment of evacuee's risk under fire accident is carried out.

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Design of Optical Image Stabilization Actuator for Compensating Hand Tremble (손 떨림 방지를 위한 OIS 액추에이터의 설계)

  • Hur, Young-Jun;Park, No-Cheol;Park, Young-Pil;Park, Kyoung-Su
    • Transactions of the Society of Information Storage Systems
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    • v.7 no.2
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    • pp.75-79
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    • 2011
  • Recently mobile phone camera become generally spread, it is required to develop high resolution, multi-functional camera module for obtaining high image quality. To satisfy this demand, number of pixels has been increased and pixel size decreased in small mobile phone cameras. As a result, image quality is seriously dropped by blur phenomena. Especially when hand tremble is occurred, image quality is dropped by camera shake. Therefore, to obtain high quality image, it is necessary to compensate user's hand tremble. In this paper, we propose voice coil actuator for compensating hand tremble, which can apply optical image stabilization (OIS) system. Sensitivity analysis and size optimization are performed to obtain high driving force. Finally, it is confirmed that the optimized electromagnetic circuit can be applied in OIS system.

A Study for Safety Work Control System in the Narrow Space (협소 공간 작업을 위한 안전제어 시스템에 관한 연구)

  • Cho, Y.S.;Kim, H.S.;Song, I.S.;Jeong, C.S.;Yang, S.Y.
    • 유공압시스템학회:학술대회논문집
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    • 2010.06a
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    • pp.62-65
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    • 2010
  • Field robot represented by excavator can be applied for various working in manufacturing, construction, agriculture etc. Because of the flexibility of its multi-joint mechanism and the high power of hydraulic actuators. Since the excavator operates in the hazardous working circumstance, operators exposed in harmful environment. Therefore, automation system has been investigated to protect from the harmful environment. In this paper, the method to construct the remote control system is proposed. The remote control system is consisted of a manual and auto mode. Manual mode controls a hydraulic cylinder as open loop control. and auto mode controls the end effecter of excavator using tracking control system. The efficiency of remote control system was evaluated through the field test.

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Capacitor design of shuffling architecture for multi-module photovoltaic converter (다중 태양광 모듈 발전 시스템에서 shuffling converter 캐패시터 설계)

  • Lee, Hwa-Seok;Seo, Jung-Won;Sundar, Mohana;Park, Joung-Hu;Kim, J.Y.
    • Proceedings of the KIPE Conference
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    • 2013.07a
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    • pp.252-253
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    • 2013
  • 다중 태양광 모듈 발전 시스템에서 부분 음영은 낮은 전력 회수율을 야기한다. 이러한 단점을 보완하는 방법으로 shuffling 컨버터가 각광을 받고 있다. 이 shuffling 컨버터 뿐만 아니라 모든 dc-dc 컨버터는 제어를 하기 위해 각 태양광 모듈마다 capacitor가 필수적이다. 하지만 shuffling 컨버터는 다른 shuffling 컨버터 동작에 영향을 주게 되므로 이를 고려한 capacitor 설계가 필요하다. 이에 본 논문에서는 shuffling 컨버터에서 기생저항을 포함하는 capacitor에 흐르는 전류를 분석하여 전압 리플 및 capacitance값을 설계하였다.

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Development of a Train Performance Simulation S/W for The Performance Analysis of High Speed Railway System(2) (고속전철 시스템 성능해석을 위한 열차 주행시뮬레이션 S/W 개발(2))

  • Lee, Tae-Hyung;Hyun, Seung-Ho;Chung, Heuing-Chai;Hwang, Hee-Soo
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.1381-1383
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    • 2000
  • A multi-train operation simulation software is under development, in this G7 Project for a High Speed Train System, to simulate the running performance, power consumption, signalling and operation. In the first stage, a Train Performance Simulation (TPS) software is introduced in this paper. This is a core module of whole system and gives some parameters of a train, e.g., its position, speed traction and braking power and electric power system state, etc. In this paper, calculation technique was used for voltage drop at the train's positions and major posts along the catenary line. The final program will be used as an evaluation tool for system performance in constructing a new line or introducing a new train system.

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Development of core model connection technology for Nuclear Power Plant Simulator (원전 시뮬레이션 노심-계통 연계기술 개발)

  • Lee Ji-woo;Lee Yong-kwan;Lee Myeong-soo;Hong Jin-hyuk;Lee Seung-Ho;Suh Jeong-Kwan
    • Proceedings of the Korea Society for Simulation Conference
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    • 2005.05a
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    • pp.129-133
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    • 2005
  • This paper describes the methodology of connecting MASTER (Multi-purpose Analyzer for Static and Transient Effects of Reactors) to simulator system, system configuration, and previous test. The actual simulator environment for Youngkwang Unit1 has been developed. It is impossible for the simulator server to execute MASTER code by limitation of computer performance. So, environment of distributed system was developed, and it had a synchronization task. As MASTER and simulator module should be synchronized in different device, the connection of communication was tested and verified.

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An Integrated LTCC Inductor and Its Application (LTCC 기술을 이용한 마이크로 인덕터 및 응용)

  • Kim Chan-Young;Kim Hee-Jun
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.53 no.11
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    • pp.680-686
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    • 2004
  • An integrated inductor using the low temperature cofiring ceramics(LTCC) technology was fabricated. The inductor has Ag circular spiral coil with 16 turns (2-turn x 8-layer) and has a dimension of 11.52mm diameter and 0.71mm thick. For the fabricated inductor, calculation method of inductance was given and it is confirmed that the calculated value is very close to the measured one. Finally as an application of the LTCC integrated inductor to low power electronic circuits, a LTCC buck DC/DC converter with 1.32W output power and 1MHz switching frequency using the inductor fabricated was developed. For the converter the maximum efficiency of about 81% was obtained.

A design and fabrication of active phased array antenna for beam scanning using injection-locking coupled oscillators (Injection-Locking Coupled Oscillators를 이용한 빔 주사 용 능동 위상배열안테나의 설계 및 제작)

  • 이두한;김교헌;홍의석
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.22 no.8
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    • pp.1622-1631
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    • 1997
  • A 3-stages Active Microstrip Phased Array Antenn(AMPAA) is implemented using Injection-Locking Coupled Oscillators(ILCO). The AMPAA is a beam scanning active antenna with capability of electrical scanning by frequency varation of ILCO. The synchronization of resonance frequencies in array elements is occured by ILCO, and the ILCO amplifies the injection signal and functions as a phase shifter. The microstrip ptch is operated as a radiation element. The unilateral amplifier is a mutual coupling element of AMPAA, eliminates the reverse locking signal and controls the locking bandwidth of ILCO. The possibility of Monolithic Microwave Integrated Circuits(MMIC) of T/R module is proposed by simplified and integrated fabrication process of AMPAA. The 0.75.$lambda_{0}$ is fixed for a mutual coupling space to wide the scanning angle and minimize the multi-mode. The AMPAA has beam scanning angle of 31.4.deg., HPBW(Half Power Beam Widths) of 26.deg., directive gain of 13.64dB and side lobe of -16.5dB were measured, respectively.

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Intelligent Multimedia Educational System on Distributed Environment (분산 환경에서의 지능형 멀티미디어 교육 시스템)

  • Lee, Se-Hun;Yun, Gyeong-Seop
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.5
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    • pp.1323-1331
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    • 1999
  • This paper suggests a multimedia educational system which has the ability to extract intelligent instruction on the distributed environment. The proposed system is designed for supporting individual instruction and real time user interaction. As the system based on CORBA, we put group managing module on it for multi user environment, so it has ability for distributed computing facilities. Using MHEG standard, we can provide multimedia courseware and real time user interaction. To diagnose students' responses and generate evaluations, we use several linguistic variables of fuzzy theory. There are two major advantages for using this system. This system can provide dynamic generation of problems and the ability to provide a dynamic instruction strategy. And it can increase reusability of courseware material for using standard of multimedia representation and communication. We use CORBA and MHEG to overcome the disadvantage of the Web, passive protocol and poor interactivity, HTTP.

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Predictive Control for Parallel Multi-module UPS Inverters with Output LC Filter (병렬 멀티-모듈 UPS 인버터의 출력 LC필터를 이용한 예측제어)

  • Park, Jung-Min;Lee, Kang-Hyun;Jung, Won-Sang;Park, Yun-Ji;Won, Chung-Yuen
    • Proceedings of the KIPE Conference
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    • 2017.07a
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    • pp.258-259
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    • 2017
  • 본 논문에서는 병렬 멀티-모듈 UPS 인버터의 출력 LC필터를 이용한 예측제어를 제안한다. 부하의 용량증가에 따라 단상 UPS 모듈을 병렬로 증가시켜 UPS 용량 증설하는 연구가 진행되고 있다. 이러한 UPS 시스템을 제어하기 위해 기존 제안하였던 전류 예측 제어에서는 PI 전압 제어로 인해 UPS 모드 절환 시 제한된 동적 반응(Dynamic response)을 갖는 단점이 있었다. 이러한 문제점을 보완하기 위해, 본 논문에서는 PI 전압제어를 전압 예측 제어로 대체함으로써 보다 빠른 동적 반응을 가질 수 있는 전압 및 전류 예측제어를 제안한다. 제안한 제어기법의 타당성은 수학적 분석 및 시뮬레이션을 통해 검증하였다.

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