• Title/Summary/Keyword: 연동제어

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Design of Multi-Phase Shift Controller for Valveless PZT Pump (밸브리스 압전펌프 연동구동 제어기 설계)

  • 조정대;박경민;노종호;함영복;유진산
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.1282-1285
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    • 2004
  • The high voltage driving system with multi-phase shifter including piezoelectric actuators comprised a driving power unit for outputting the driving power by converting input alternate current into direct current, a frequency shifting unit for supplying the direct current power and shifting or generating a frequency, a high-voltage amplification unit for amplifying the input signal outputted from the driving power unit and the frequency shifting unit into a high-voltage signal, and a phase shifting unit for shifting the phase difference of the amplified signal applied to the high-voltage amplification unit and driving plural piezoelectric actuators sequentially. The results that the operating voltage was stable, the voltage loss ratio was low and the response velocity was fast could be obtained. An experiment on performance of the high voltage driving system with multi-phase shifter designed and manufactured as above described was conducted by using a piezoelectric pump having 3 sheets of round unimorph piezoelectric actuators laminated respectively in a rectangular case. It sucks any fluid by causing the first piezoelectric actuator to shift from the inlet porter side, the phase delay of 60$^{\circ}$ causes the second piezoelectric actuator to begin to shift, and the phase delay of 120$^{\circ}$ causes the third piezoelectric actuator to begin to shift. As a result of measuring each change in the outlet flow rate of the piezoelectric pump, it was shown that the frequency-flow rate characteristic, the voltage-flow characteristic, and the load pressure-flow rate characteristic were improved.

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Bandwidth Ratio Considerations for Traffic Parameter Mapping on the Frame Relay/ATM Interworking (FR/ATM 연동에서 트래픽 파라메타를 사상하기 위한 대역 비율)

  • Nam, Yun-Seok;Kim, Jeong-Sik
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.1
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    • pp.175-181
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    • 1999
  • There are issues regarding how some of traffic parameters should be set so that ATM and non-ATM service parameters can be compatible. For example, policing method used by frame relay based on CIR(committed information rate) will not exactly match the ATM UPC(Usage Parameter Control) method. ATM and the frame relay have different transfer modes and traffic parameters. The cells and frames are police by their own traffic control schemes. For the same information, the real traffic of the ATM side takes greater bandwidth than that of the frame relay side caused by ATM cell format and AAL5 format. IN both networks this bandwidth than that of the frame relay side caused by ATM cell format and AAL5 format. In both networks this bandwidth ratio should be considered on traffic parameter mapping to maintain their QoS and to perform efficient network resource management. In this paper we describe traffic parameter mapping schemes between frame relay and ATM in ATM network and how to expect the bandwidth ratio to maintain FR QoS in ATM network. We assumed frame length distribution to Erlang or Exponential probability density function.

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A Study on Home Network Functional Model for Personal Area Network based Virtual Home Network (PAN (Personal Area Network) 기반 가상 홈 (Virtual Home) 지원을 위한 홈 네트워크 연동 모델 연구)

  • Joong Hyun Joong
    • Journal of the Korea Society of Computer and Information
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    • v.10 no.1 s.33
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    • pp.167-174
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    • 2005
  • With the progress of portable appliances such as cell phone and handhold PC, the popularization of Personal Area Network (PAN) and the diversification of services that are based on Personal Mobile Gateway (PMG) . To use home services at any time regardless of their Position, it needs a virtual home network that a home network and outside networks are finally integrated. Although interoperability among home appliances reached their service stage, research for services and middleware for new small scale network such as PAN is at an early stage. Traditional home network service/connection methods, terminal control schemes, and middlewares must be extended to accommodate PMG-based PAM. In this paper, we propose an integrated virtual home network Platform that guarantees seamless connections between home network and PAM. We also analyze indispensable functions and presents functions that should be added existent home gateway or home sewer by function.

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An Implementation of the Dual Packet Seamless Transfer Protocol for Safety-related Railway Signaling System Network (철도 신호시스템의 Fail-Safe 네트워크를 위한 DPST(Dual Packet Seamless Transfer) 프로토콜의 구현)

  • Kim, Kyung-Shik;Ryu, Shin-Hyung;Kwon, Cheol;Lee, Jong-Seong
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.396-405
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    • 2009
  • An interlocking equipment of railway signalling systems should have very high functional safety and reliability properties because of its vital railway protection functionality. In order to achieve the required safety and reliability level, an engineer, in general, designs and implements the interlocking equipment to operate under RTOS(Realtime Operating System) environment, and the control hardware architecture redundant to cope with the random failures of system or subsystem. In such an architecture, it's very difficult to implement the interlocking equipment to communicate with various interface systems including the signal operator's terminal. In this paper, we propose a dual ethernet network topology and dual packet seamless transfer protocol algorithm for railway signaling system such as the interlocking equipment. We verify in this paper that the proposed DPST protocol algorithm has the evidence of its robust properties against the random hardware faults and communication errors. The proposed communication structure and algorithm is implemented in the electronic interlocking equipment for the private railway system of Hyundai Steel Company and its performance and properties are validated on the guideline of European Railway Standard EN50159.

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Interworking architecture between Smart-TV and Smart-phone using NFC and QR technology (NFC와 QR기술을 사용한 스마트TV와 스마트폰의 연동구조)

  • Eun, Sung Bae;Chae, Yi Geun;So, Sun Sup
    • Journal of Advanced Marine Engineering and Technology
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    • v.38 no.4
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    • pp.463-469
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    • 2014
  • We propose an interworking architecture between a smart TV and a smart phone. This architecture provides control mechanism for the newly adopted App on Smart-TV with smart phone. The general method connecting between a smart phone and a mobile AP is very carefully complex and troublesome procedure. The mobile AP transfers data from a smart phone to a smart TV after getting the connection. Connecting procedure between a smart phone and a mobile AP is therefore necessary operation. We worked out the new procedure and control method that acquires some information from Near Field Communication or Quick Reference codes for connecting between a smart TV and a smart phone. Our proposed architecture was confirmed practical possibility as user-oriented automatic connection and simple manipulation for control a kiosk or various display equipment.

Development of Traffic State Classification Technique (교통상황 분류를 위한 클러스터링 기법 개발)

  • Woojin Kang;Youngho Kim
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.22 no.1
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    • pp.81-92
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    • 2023
  • Traffic state classification is crucial for time-of-day (TOD) traffic signal control. This paper proposed a traffic state classification technique applying Deep-Embedded Clustering (DEC) method that uses a high dimensional traffic data observed at all signalized intersections in a traffic signal control sub area (SA). So far, signal timing plan has been determined based on the traffic data observed at the critical intersection in SA. The current method has a limitation that it cannot consider a comprehensive traffic situation in SA. The proposed method alleviates the curse of dimensionality and turns out to overcome the shortcomings of the current signal timing plan.

Implementation of a Dual-mode Power Strip Controller Cooperating with Smartphones Based on Environmental Sensors (환경센서에 기반한 스마트폰 연동형 듀얼모드 전원 스트립 제어기 구현)

  • Lim, Jae-Hyun;Kim, Jong-Hyun;Jang, Min-Jun;Choi, Yeon-Seung;Cheong, Ho-Young
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2015.10a
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    • pp.465-467
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    • 2015
  • This paper implements a dual-mode power strip controller (PSCtrl) with environmental sensors which cooperates with Android-based smartphones. According to the statistics on fires in housing facilities, unidentified electrical fires account for 23.4%. In order to reduce these fire accidents caused by user carelessness and protect life and property, smart power control techniques with improved user convenience are required. For this reason, the implemented dual-mode PSCtrl controls ON-OFF operations of a power strip in two ways (e.g. manual and automatic modes) by cooperating with Android-based smartphones provided with environmental data from light, temperature, and humidity sensors. In manual mode, users check environmental data displayed on Android-based smartphones, forcibly controlling the ON-OFF operations through the dual-mode PSCtrl, and in automatic mode, when environmental data exceeds the threshold set by users in advance, the dual-mode PSCtrl automatically controls the ON-OFF operations. Some experimental tests verify successful dual-mode operations of the implemented dual-mode PSCtrl.

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A Design Technique for Stabilization of Inverted Pendulum Cart System on the Inclined Rail (경사 레일상에 있는 도립진자 장치의안정화 설계기법)

  • 박영식;최부귀;윤병도
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.3 no.4
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    • pp.62-69
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    • 1989
  • 휴대용 전기톱을 비롯한 학습 기계장치, 자동차 연동장치, 각종 화학 분석장치 및 산업용 로봇 시스템등의 전기설비에 광범위하게 응용되고 있는 고유 불안정 도립진자 시스템의 동적 안정화 제어기 설계기법이 소개된다. 복잡한 비선형 동특성을 고려한 수학적 모델링과 C. D. Johnson에 의해 제시된 외란 적응 제어 이론을 적응하여, 최적 레귤레이터형 안정화 제어기를 설계하였으며, 컴퓨터 시뮬레이션 및 실험결과가 만족스럽게 나타났다.

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A Study on IoT Remote Control for IoT Device and Service Control (사물인터넷 디바이스 및 서비스의 제어를 위한 사물인터넷 리모컨에 관한 연구)

  • Kim, Dong-min;Lim, Ji-yong;Oh, Am-suk
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2018.05a
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    • pp.542-543
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    • 2018
  • 대부분의 사물인터넷 디바이스는 스마트폰 애플리케이션으로 제어하고 있어 제조사가 다른 디바이스를 사용할 경우 여러 애플리케이션을 설치하여 사용하여야 한다. 본 논문에서는 스마트홈 환경에서 사물인터넷 디바이스와 서비스를 통합 제어할 수 있는 사물인터넷 리모컨을 제안한다. 그리고 사물인터넷 리모컨의 초기 설정을 위한 애플리케이션과의 연동 테스트를 진행하였다.

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IT기계융합기술

  • Kim, Yeong-Han;An, Hyeong-Jun;Choe, Dong-Su
    • Information and Communications Magazine
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    • v.28 no.5
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    • pp.28-36
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    • 2011
  • 기계간 지능형 자율 협업을 기반으로 유비쿼터스 생산시스템을 목표로 하는 u-Manufacturing 시스템은 IT와 기계간 융합을 통해 이를 차세대 생산시스템으로서 기존 단위기계 제어에서 공정상 혹은 운영상 연동이 요구되는 일련의 기계들이 상호정보를 교환하고 이를 근거로 제어가 자율적으로 이루어지는 지능형 제어방식을 근간으로 한다. 본고에서는 이러한 궁극적인 IT기계융합시스템의 내용과 그 전단계에 이루어진 다양한 형태의 IT기계융합사례들을 살펴본다. 특히 정밀 생산 공정이 요구되는 공장에서의 기반기술이라 할 수 있는 초정밀 모션시스템에 있어서의 IT융합기술 대한 내용을 고찰하여 미래 IT융합기술의 발전방향을 전망해본다.