• Title, Summary, Keyword: On-board controller

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Design and Implementation of a Duplex Digital Excitation Control System for Power Plants

  • Nam. Chae-Ho;Nam, Jung-Han;Choi, June-Hyug;Baeg, Seung-Yeob;Cho, Chang-Ho
    • 제어로봇시스템학회:학술대회논문집
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    • pp.140.4-140
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    • 2001
  • This paper presents the duplex controller operated as master slave for Self Excited Static Type excitation system and the results of operation for duplex digital excitation system. Software is made up duplex multi-tasking control algorithm which is based on VxWorks(real-time OS), preprocessing algorithm for input-output signal, BSP & Device Driver for interfacing hardware and software, and OIS(Operator Interface Station) program, HMI S/W. Master controller and slave controller intercommunicate dominant data to minimize bump when controller switchover from master to slave occurs. Communication between master controller and slave controller is duplicated and communication between OIS and controller is duplicated. Hardware is made up VMEBUS based controller which is designed with PPC & I/O board ...

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A Study for Control using DC Gain and Time Constant of Flow Controller Operated by Piezoelectric Actuator and Thermocouple (열전대 센서와 압전체 구동기가 부착된 유량제어기의 DC 이득과 시상수를 이용한 제어에 대한 연구)

  • Lee, Sang-Kyung;Kim, Young-Soo
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.3 no.1
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    • pp.79-83
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    • 2004
  • This study was how to control the mass flow controller in gas supplying system. The flow controller consists of piezoelectric material and sensor with heating wire. It is difficult to obtain accurate model, because MFC was composed of many parts, and the relationship between input and output of controller is nonlinear. The model for control was obtained by time constant and DC gain Based on this model, PID controller was applied to flow controller using DSP board. Also, the results were compared to controller using system identification.

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The Design and Implementation of Open Architecture CNC Software Module by a Real-time Control (실시간 제어에 의한 개방형 CNC 소프트웨어 모듈의 설계 및 구현)

  • 이제필
    • Journal of The Korean Society of Manufacturing Technology Engineers
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    • v.8 no.5
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    • pp.54-62
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    • 1999
  • This paper describes the design and implementation of a PC(personal computer) based open architecture machine tool controller. The hardware of open architecture CNC has generally a motion control board on a PC for controlling a servo motor. But this paper describes open architecture hardware that consists of a PC, a counter board a DAC board and a DIO board only. This makes it easy to generate CNC software module in a hardware-independent way. The proposed open architecture CNC software runs on the MS-Windows NT. The paper describes a method of con-trolling servo motors using a real-time timer of MS-Windows NT and a commercial real-time operating system on the MS-Windows. NT. An open and reconfigurable software module is made up of an object and an API(application programming interface). Using the object and the API a new CNC system can be quickly configured to control dif-ferent machine tools. The proposed open architecture CNC system is applied to 4-axis lettering center.

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Realization and Experiment of Digital PPF Controller Using Micro-Controller (마이크로 컨트롤러를 이용한 디지털 PPF 제어기의 구현과 실험)

  • Kim, Ki-Young;Heo, Seok;Kwak, Moon-K
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.148-152
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    • 2003
  • This paper is concerned with the digital implementation of the active vibration suppression controller. The digital controllers are often implemented on the DSP board, which is very fast but expensive. There are many low-cost micro-controllers in the market but the feasibility of such micro-controllers for the active vibration suppression has never been conducted. In this study, we selected PIC 16F877 as a proper micro-controller for the digital implementation of the PPF controller. The circuit diagrams are explained in detail. Experimental results show that the low-cost micro-controller can be used as the active vibration controller.

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Speed Sensorless Vector Control Implementation of Induction Motor Using dSPACE 1104 System (dSPACE 1104 시스템을 이용한 유도전동기 속도 센서리스 벡터제어 구현)

  • Lee, Dong-Min;Lee, Yong-Suk;Ji, Jun-Keun;Cha, Gui-Soo
    • Proceedings of the KIEE Conference
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    • pp.1086-1087
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    • 2007
  • This paper presents a implementation of speed sensorless vector control algorithm of induction motor using MATLAB/SIMULINK. The proposed method utilize the combination of the voltage model based on stator equivalent model and the current model based on rotor equivalent model, which enables stable estimation of rotor flux. Estimated rotor speed, which is used to speed controller of induction motor, is based on estimated flux. The overall system consisted of speed controller with the most general PI controller, current controller, flux controller. Speed sensorless vector control algorithm is implemeted as block diagrams using MATLAB/SIMULINK. Realtime control is perform by dSPACE DS1104 control board and Real-Time-Interface(RTI).

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Development of the Monitoring System for maintaining On-site Wastewater Treatment Plants (소규모 현장 오수처리시설의 유지관리를 위한 Monitoring System 개발)

  • Cho, Young-Hyun;Kwun, Soon-Kuk
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • pp.417-420
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    • 2001
  • The monitoring system for maintaining on-site wastewater treatment plants(Biofilter) was developed. Proposed system applied PLC(Programmable Logic Controller) technique. In process of development, the research against the monitoring parameters which will be able to represent condition and operation of the plants was accomplished. These parameters are ORP(Oxidation-Reduction Potential), Water Level, Pump and Power on/off. Also, to measure, collect, transfer and display these parameters, DMU(Data Measurement Unit), MCU(Main Controller Unit) and Display Board were produced.

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Development of Active Noise Control System using DSP (DSP를 이용한 능동소음 제어시스템의 개발)

  • Kim, H.S.;Shin, J.;Oh, J.E.
    • Journal of the Korean Society for Precision Engineering
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    • v.11 no.1
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    • pp.108-113
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    • 1994
  • Active noise control technique has superior performance in low frequency ranges(50 .approx. 400Hz) to the conventional passive noise control technique. For the feasibility of active noise control, it is required to develop a controller which can implement control algorithm on real-time. In this study, therefore, real-time controller is developed using TMS320c25, high speed digital processor. Unlike conventional DSP board of complete ADD ON type, it is possible for the developed controller to interface with the other computer system easily by series communication for the convenience of program development. Furthermore it is designes to be separated readily as a control device. Active noise control of duct system is implemented ti evaluate a performance of developed device. Active noise control of duct system is implemented to evaluate a performance of developed controller using filtered-x LMS algorithm.

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Control of Magnetic Bearing using ATmega128(Focused on experiments) (ATmega128 소자를 이용한 자기베어링 제어(실험을 중심으로))

  • Yang, Joo-Ho;Choi, Gyo-Ho;Choung, Kwang-Gyo
    • Journal of the Korea Society For Power System Engineering
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    • v.17 no.4
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    • pp.139-146
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    • 2013
  • Because the magnetic bearing supports levitating body without contact, wear, noise and vibration, it is very useful to high revolution machinery. In this paper we selected ATmega 128, a less expensive and widely used micro controller, for control the magnetic bearing system. And we selected the sampling time and the control gain of PID controller through trial-and-error. The control program of the one board controller utilized lookup table to reduce calculation time, and bit shifting for the integer calculation in instead of floating point calculation. As the results, the controller carried out relatively high speed PID control on sampling time 0.25 ms. At last the rotation test for the magnetic bearing system was carried out by 3 phase induction motor and air turbine.

A Study on the Modeling and Control of High-Speed/High-Accuracy Position Control System (고속/정밀 위치제어시스템의 모델인 및 제어에 관한 연구)

  • Park, Min-Gyu;Han, Chang-Soo
    • Journal of Institute of Control, Robotics and Systems
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    • v.7 no.5
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    • pp.399-406
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    • 2001
  • This paper presents a dynamic modeling and a sliding mode controller for the high-speed/high-accuracy position control system. The selected target system is the wire bonder assembly which is used in the semiconductor assembly process. This system is a reciprocating one around the pivot point that consists of VCM(voice coil motor) as an actuator and transducer horn as a bonding tool. For the modeling elements, the sys-tem is divided into electrical circuit, magnetic circuit and mechanical system. Each system is modeled using the bond graph method and united into the full system. Two major aims are considered in the design of the controller. The first one is that the horn must track the given reference trajectory. The second one is that the controller must be realizable by using the DSP board. Computer simulation and experimental results show that the designed sliding mode controller provides better performance than the PID controller.

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Fuzzy Controller Design for Fuel Saving in Sun Point Mode for KOMPSAT-2

  • Choi, Hong-Taek;Oh, Shi-Hwan;Rhee, Seung-Wu
    • 제어로봇시스템학회:학술대회논문집
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    • pp.2108-2111
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    • 2005
  • The mission life of a satellite determines the amount of fuel required on-board, while the total mass requirement limits the fuel to be loaded. Hence, for the design of thruster control loop, not only the satellite pointing accuracy but the saving of fuel is to be considered. In this paper, a two-step fuzzy controller is proposed for the thruster control loop to save fuel consumption. This approach combines requirements for pointing control accuracy with minimum fuel consumption into a fuzzy controller design. To demonstrate this approach, we have designed a fuzzy controller for the Sun point Mode of KOMPSAT-2. The performance of this fuzzy controller design is compared with that of PD controller used for KOMPSAT-2.

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