• Title, Summary, Keyword: On-board controller

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Development of the Digital Controller for High Precision Digital Power Supply (고정밀전원장치를 위한 디지털 제어기 개발)

  • Ha, K.M.;Lee, S.K.;Kim, Y.S.
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • pp.249-250
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    • 2006
  • In this paper, hardware design and implementation of digital controller for the High Precision Digital Power Supply (HPDPS) based on Digital Signal Processor (DSP) and Field Programmable Gate Array (FPGA) is presented. Developed digital controller is composed of high resolution Digital Pulse Width Modulation (DPWM) and high resolution analog to digital converter circuit with anti-aliasing filter. And Digital Signal Processor (DSP) has the capability of a few micro-second calculation time for one feedback loop. 32-bit DSP and DPWM with 150[ps] step resolution is used to implement the HPDPS. Also 18-bit 2 mega sample per second ADC board is adopted for the developed digital controller. Also, hardware structure of the developed digital controller and experimental results of the first prototype board for HPDPS is described.

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A Study on Design of the Electric Sign Board System using Embedded ARM Board (내장형 ARM 보드를 이용한 전광판 시스템 설계에 관한 연구)

  • 최재우
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.5 no.3
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    • pp.241-246
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    • 2004
  • We have designed LED display system using ARM7TDMI processor and implemented hangul input and output. This system is easily extensible because controller board and LED matrix board were designed one module. Possible Input Methods of LED display system are PC, PDA and remote controller's wired and wireless communication. We have ported QT/Embedded 2.3.7 with touch panel Input at embedded board of Linux OS 2.4.18 and PXA255 Processor based. QT Application which we coded is able to input displaying text using ethernet communication on embedded system. Many of indicating text data is able to be saved because only korean alphabet codes are stored for data which users want displaying.

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Study on the Plug/Play Type Open Architecture CNC Technology (Plug/Play 타입의 개방형 CNC 기술 연구)

  • 윤원수;김찬봉;이은애;김세광;오세봉
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.28-32
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    • 1997
  • This study aims at developing the high speed/intelligent machining system suing the plug/play method of an open architecture controller. The plug/play technology by the Application Specific Function (ASF), can readily implement the open architecture controller into various machining system or other automatic equipments. For the open architecture controller, this study developed the open HMI, screen editor, ASF, visual builder, and controller OS technology as software components. On the other hand, we developed the I/O module and main board as control hardware system. This study, as an example, presents integration of individual component technologies for the plug/play type open architecture CNC system.

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DESIGN AND IMPLEMENTATION OF ON-BOARD COMPUTERS FOR STSAT-2

  • Ryu Changwan;Choi Myungjin;Oh Daesoo;Kang Kyungin;Nam Myeong-Ryong;Keum Junghoon
    • Bulletin of the Korean Space Science Society
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    • pp.293-295
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    • 2004
  • The Engineering Model of on-board computer was developed and tested completely with other sub-systems for STSAT-2. We designed the on-board computer of STSAT-2 which has some improved features compared with that of STSAT-l. A remarkable change is that the on-board computer has a structure of centeralized network communication without a Network Controller of the STSAT-l. That is, the on-board computer directly manages a satellite network. In addition, as many logics are implemented by Field Programmable Gate Array, so we can reduce the weight and size of on-board computer. Also, the developed on-board computer has more improved tolerance against Single Event Upsets and faults than that of the STSAT-l.

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Implementation of Main Computation Board for Safety Improvement of railway system (철도시스템의 안전성 향상을 위한 주연산보드 구현)

  • Park, Joo-Yul;Kim, Hyo-Sang;Lee, Joon-Hwan;Kim, Bong-Taek;Chung, Ki-Seok
    • Proceedings of the KSR Conference
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    • pp.1195-1201
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    • 2011
  • Since the release of safety standard IEC 61508 which defines functional safety of electronic safety-related systems, SIL(Safety Integrity Level) certification for railway systems has gained lots of attention lately. In this paper, we propose a new design technique of the computer board for train control systems with high reliability and safety. The board is designed with TMR(Triple Modular Redundancy) using a certified SIL3 Texas Instrument(TI)'s TMS570 MCU(Micro-Controller Unit) to guarantee safety and reliability. TMR for the control device is implemented on FPGA(Field Programmable Gate Array) which integrates a comparator, a CAN(Controller Area Network) communication module, built-in self-error checking, error discriminant function to improve the reliability of the board. Even if a malfunction of a processing module occurs, the safety control function based on the proposed technique lets the system operate properly by detecting and masking the malfunction. An RTOS (Real Time Operation System) called FreeRTOS is ported on the board so that reliable and stable operation and convenient software development can be provided.

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Development of the Integrated Monitoring System for Panel boards (분전반 통합 감시 시스템 개발)

  • Kim, Il-Kwon;Cho, Hyun-Kyung;Lee, Dong-Zoon
    • Proceedings of the KIEE Conference
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    • pp.347_348
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    • 2009
  • In this paper, we described the integrated monitoring system for low-voltage panel boards. This system consists of three parts, a panel board controller, an integrated monitoring unit and a remote PC. The panel board controller which was made of CT/PT unit, control unit and power supply is able to transmit variable parameter for monitoring and diagnosis of low voltage branch circuits. Also, the integrated monitoring unit was collected monitoring data from panel boards and displayed on the touch panel.

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Implementation of an Intelligent Controller with a DSP and an FPGA for Nonlinear Systems

  • Kim, Sung-Su;Jung, Seul
    • 제어로봇시스템학회:학술대회논문집
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    • pp.575-580
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    • 2003
  • In this paper, we develop a control hardware such as an FPGA based general purpose controller with a DSP board to solve nonlinear control problems. PID control algorithms are implemented in an FPGA and neural network control algorithms are implemented in a DSP board. PID controllers implemented on an FPGA was designed by using VHDL to achieve high performance and flexibility. By using high capacity of an FPGA, the additional hardware such as an encoder counter and a PWM generator, can be implemented in a single FPGA device. As a result, the noise and power dissipation problems can be minimized and the cost effectiveness can be achieved. In order to show the performance of the developed controller, it was tested for controlling nonlinear systems such as an inverted pendulum.

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Development of SNMP Management System for Remote Control of Power Plants Using Micro-Controller (마이크로컨트롤러를 이용한 전력설비의 원격제어를 위한 SNMP 관리시스템 개발)

  • Shim, Woo-Hyuk;Yoon, Jae-Shik;Kim, Beung-Jin;Lim, Byung-Kuk;Jeon, Hee-Jong
    • Proceedings of the KIEE Conference
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    • pp.649-651
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    • 1999
  • This paper presents SNMP remote management system for power plants using micro-controller. Control board supporting LAN-based remote monitor and control is produced and MMI program on PC is also constructed. To expand into Internet, SNMP(Simple Network Management Protocol), the standard network management protocol of TCP/IP protocol suite, is ported to this control board consisted of micro-controller, 80c196KC, and LAN controller, Am7990DC. To overcome the constraints of CPU performance and memory capacity, TCP/P protocol suite is simplified and informations needed to management were implemented in accordance with MIB(Management Information Base) specified in RFC. Also monitoring software is constructed by Visual Basic.

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Development of an Educational System and Real Time Nonlinear Control (I) (교육용 시스템 개발과 실시간 비선형 제어(I))

  • 박성욱
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.51 no.12
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    • pp.562-570
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    • 2002
  • The Purpose of this paper is to design and manufacture an educational system in order to demonstrate the causes and effects of electromagnetic induction.'rho educational system described in this study is a "jumping ring apparatus". This system demonstrates the principle of electromagnetic induction, a force from AC sources, Lenz's law of repulsion and transformer. The educational system is composed of a jumping ring apparatus, a sensor array, encoder, A/D converter, D/A converter and nonlinear controller. The educational system is controlled by 586 PC using Turbo C program. The sensor array is composed of 20 optical sensors. The nonlinear controller consists of nonlinear control algorithm and control board included SCR, FET and phase controller. The A/D converter is used to show the height of ring position to analog for an education purpose. The control signal calculated from the nonlinear control of algorithm send control board through 8 bit D/A convertor. Experiment results are given to verify that Proposed nonlinear controller is useful in on line control of the educational system.al system.

A Study On The Intermittent Message Acquisition Board Using FPGA For KHSR (FPGA를 이용한 한국형 고속전처 불연속 정보 수신보드 개발에 관한 연구)

  • Han Jae-Mun;Um Jung-Kyu;Kim Chi-Cho;Cho Yong-Gee
    • Proceedings of the KSR Conference
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    • pp.1180-1184
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    • 2004
  • There are two types of controller between railway and train. those are the Continuous Message Controller and the Intermittent Message Controller using for KHSR. The conventional Intermittent Message Controller board used a variable resister for setting the phase, but the variable resister affected some environmental facts, such as temperature, humidity, and vibration, etc. This study suggests how to solve the environmental problem described above. Using FPGA is quite profitable. It's easy to use and maintain, flexible with the New algorithm to fix up the problem.

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