• Title, Summary, Keyword: On-board controller

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A Controller Design for a Stability Improvement of an On-Board Battery Charger

  • Jeong, Hae-Gwang;Lee, Kyo-Beum
    • Journal of Electrical Engineering and Technology
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    • v.8 no.4
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    • pp.951-958
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    • 2013
  • This paper proposes the controller design for a stability improvement of an on-board battery charger. The system is comprised of a power factor correction (PFC) circuit and phase shift full-bridge DC-DC converter. The PFC circuit performs the control of the DC-link voltage and the input power factor. The DC-DC converter regulates the voltage and the current in the battery using the DC-link voltage. This paper proposes the design method of PI controller for the PFC circuit using a small signal model. The analysis and design of a type-three controller for the DC-DC converter is also presented. A simulation and experiment has been performed on the on-board battery charger and their results are presented to verify the validity of the proposed system.

Study On Development of Fast Image Detector System (고속 영상 검지기 시스템 개발에 관한 연구)

  • 임태현;이종민;김용득
    • Proceedings of the IEEK Conference
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    • pp.241-244
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    • 2003
  • Nowadays image processing is very useful for some field of traffic applications. The one reason is we can construct the system in a low price, the other is the improvement of hardware processing power, it can be more fast to processing the data. In this study, I propose the traffic monitoring system that implement on the embedded system environment. The whole system consists of two main part, one is host controller board, the other is image processing board. The part of host controller board take charge of control the total system, interface of external environment. and OSD(On screen display). The part of image processing board takes charge of image input and output using video encoder and decoder, image classification and memory control of using FPGA, control of mouse signal. And finally, fer stable operation of host controller board, uC/OS-II operating system is ported on the board.

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Communication Consecutive Test of Train Oriented Control System for Wayside Equipment Control (선로변 시설물 차상제어를 위한 차상중심 열차제어시스템의 통신 연속성 시험)

  • Baek, Jong-Hyen
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.5
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    • pp.703-712
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    • 2014
  • To improve the efficiency and safety of railway systems, the train control system has been considerably evolved from the ground-equipment-based control system (e.g. track circuit, interlocking system, etc.) into the on-board-equipment-based control system. In addition, this train control system enables the rolling stock to intelligently control the trackside facilities by introducing the information and communication technologies (ICT). Accordingly, since the ICT-based train control system makes the railway system be simplified (i.e. the heavy ground-equipment can be removed), the efficient and cost-effective railway system can be realized. In this paper, we perform the feasibility test of the ICT-based train control system via a simulation. To this end, we have developed the prototypes of the on-board controller and wayside object control units which control the point and crossing gate and performed the integrated operation simulation in a testbed. In this paper, before the field test of the on-board-controller-based train control system, we perform the Consecutive operation test for prototypes of the on-board controller, wayside object control units and local control computer.

DEVELOPMENT OF THE READOUT CONTROLLER FOR INFRARED ARRAY (적외선검출기 READOUT CONTROLLER 개발)

  • Cho, Seoung-Hyun;Jin, Ho;Nam, Uk-Won;Cha, Sang-Mok;Lee, Sung-Ho;Yuk, In-Soo;Park, Young-Sik;Pak, Soo-Jong;Han, Won-Yong;Kim, Sung-Soo
    • Publications of The Korean Astronomical Society
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    • v.21 no.2
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    • pp.67-74
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    • 2006
  • We have developed a control electronics system for an infrared detector array of KASINICS (KASI Near Infrared Camera System), which is a new ground-based instrument of the Korea Astronomy and Space science Institute (KASI). Equipped with a $512{\times}512$ InSb array (ALADDIN III Quadrant, manufactured by Raytheon) sensitive from 1 to $5{\mu}m$, KASINICS will be used at J, H, Ks, and L-bands. The controller consists of DSP(Digital Signal Processor), Bias, Clock, and Video boards which are installed on a single VME-bus backplane. TMS320C6713DSP, FPGA(Field Programmable Gate Array), and 384-MB SDRAM(Synchronous Dynamic Random Access Memory) are included in the DSP board. DSP board manages entire electronics system, generates digital clock patterns and communicates with a PC using USB 2.0 interface. The clock patterns are downloaded from a PC and stored on the FPGA. UART is used for the communication with peripherals. Video board has 4 channel ADC which converts video signal into 16-bit digital numbers. Two video boards are installed on the controller for ALADDIN array. The Bias board provides 16 dc bias voltages and the Clock board has 15 clock channels. We have also coded a DSP firmware and a test version of control software in C-language. The controller is flexible enough to operate a wide range of IR array and CCD. Operational tests of the controller have been successfully finished using a test ROIC (Read-Out Integrated Circuit).

Preliminary Field Trial of Improved Train Control System Using on-board Control (선로변 시설물 차상 제어를 위한 차상중심 열차제어시스템 예비 현장시험)

  • Park, Chul Hong;Choi, Hyeon Yeong;Baek, Jong-Hyen
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.39C no.3
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    • pp.298-306
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    • 2014
  • The railway signalling system for safe train operation regulates the train speed to ensure the safety distance between consecutive trains by using wayside facilities such as track circuits and interlocking systems. In addition, this signalling system controls the trackside equipment such as a railway point along the train line. This ground-equipment-based train control systems require high CAPEX and OPEX. To deal with these problems, the train control system using the on-board controller has been recently proposed and its related technologies have been widely studied. The on-board-controller-based train control system is that the on-board controller can directly control the trackside equipment on the train line. In addition, if this system is used, the wayside facilities can be simplified, and as a result, the efficient and cost-effective train control system can be realized. To this end, we have developed the prototypes of the on-board controller and wayside object control units which control the point and crossing gate and performed the integrated operation simulation in a testbed. In this paper, before the field test of the on-board-controller-based train control system, we perform the preliminary field trial including the installation test, wireless access test, interface test with other on-board devices, and normal operation test.

The Design of Remote Decentralization Embedded System supporting the Internal and CAN

  • Lee, Hyunsuk;Jaenam Lim;Jaepyung Ko;Park, Jinwoo;Lee, Jangmyung
    • 제어로봇시스템학회:학술대회논문집
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    • pp.57.3-57
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    • 2001
  • This paper introduces a system which offers the possibility to access remote CAN devices over the Internet as if they were local. The system consists of a local computer and the DSP server. The DSP is connected to a CAN bus with a DC motor and to a Internet simultaneously. The DSP board consists of a LAN controller and a CAN controller. It can convert to a protocol between CAN and Internet. The DSP board is not based on a personal computer. This board is profited a small and light system.

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A Study on the Energy Reduced Cooling System for the Ship (선박용 에너지 절감형 냉각시스템에 관한 연구)

  • Oh, Jin-Seok;Lim, Kyu-Myung;Jin, Sun-Ho;Kwak, Jun-Ho;Jo, Kwan-Jun;Yu, Byung-Rang;Bae, Byung-Deok
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • pp.1108-1112
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    • 2005
  • Recently, the fuel charge is accounted for very high in the navigation cost. Therefore Shipowner is tried to find method for reducing oil consumption. ERCS(Energy Reduced Cooling System) is one of the method. The ERCS algorithm operates to decrease a power consumption of main sea water cooling pump through inverter control. We have developed ERCS controller with algorithm. The ERCS controller consists of CPU board, Digital I/O board, A/D board, D/A board and LCD/SW board. We tested with dummy signal to confirm the algorithm working correctly and achieved the good results. Before soon we will test under real condition in the ship and expect to get the result as forecasted.

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Flow and Thermal Analyses for Evaluation of a Robot Controller Cooling System (로봇제어기 냉각시스템분석을 위한 열유동 해석)

  • Cho, K.J.;Park, S.W.
    • Proceedings of the KSME Conference
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    • pp.414-418
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    • 2001
  • Flow and thermal characteristics of cooling system for the robot controller were numerically as well as experimentally investigated. To obtain the overall flows within controller, the system level solutions were analysed at first and then the board level solutions were pursued to understand the detailed flow and temperature fields near the main board which have a significant influence on the cooling of electronic components. The evaluation for a performance of the heat exchanger was conducted on the basis of the obtained flow and temperature patterns. The results showed that the heat exchanger made a small contribution to the cooling of controller and caused an increase of the temperature in CPU.

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The Implementation of High speed Memory module Interface in the Military Single Board Computer (군용Single Board Computer에서의 고속메모리모듈 I/F구현)

  • Lee, Teuc-Soo;Kim, Young-Kil
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.3
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    • pp.521-527
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    • 2011
  • POWER PC series are common to the Central Processing Unit for Military Single Board Computer. Among them, G4 group, which contains the 74xx series supported by Freescale manufacturer is mainly used in the Military applications. We focus on the Interface between memory and controller. PCB stacking method, component routing, impedance matching and harsh environment for Military spec are the main constraints for implementation. Also, we developed memory as a module for the consideration of Military environments. The overall type of SBC should be designed by the form of 6U VME or 3U VME. Therefore this study suggests the electrically optimum Interface matching, Artwork technology based on the signal cross over and PCB stacking method on the harsh environment.

A Study On Development of Fast Image Detector System (고속 영상 검지기 시스템 개발에 관한 연구)

  • Kim Byung Chul;Ha Dong Mun;Kim Yong Deak
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.41 no.1
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    • pp.25-32
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    • 2004
  • Nowadays image processing is very useful for some field of traffic applications. The one reason is we can construct the system in a low price, the other is the improvement of hardware processing power, it can be more fast to processing the data. In traffic field, the development of image using system is interesting issue. Because it has the advantage of price of installation and it does not obstruct traffic during the installation. In this study, 1 propose the traffic monitoring system that implement on the embedded system environment. The whole system consists of two main part, one is host controller board, the other is image processing board. The part of host controller board take charge of control the total system interface of external environment, and OSD(On screen display). The part of image processing board takes charge of image input and output using video encoder and decoder, Image classification and memory control of using FPGA, control of mouse signal. And finally, for stable operation of host controller board, uC/OS-II operating system is ported on the board.