• 산업기술연구
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• 제21권A호
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• pp.97-103
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• 2001

This paper presents the development of the I/O Interface for the real time parallel data communication between controller of a six-axis industrial robot(CRS-A460) and an external computer. The proposed I/O Interface consists of the hardware I/O interface and the software that is downloaded to the robot controller and executed by the controller operating system. The constitution of the digital I/O Port for CRS-A460 robot controller and the digital I/O board for IBM-PC are presented as well as the Process Control Program of the robot controller. The developed protocol for the parallel data communication is described. The data communication is tested, and the performance is analysed. In particular, it is shown that the real-time constraint of the robot controller process is satisfied.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.588-588
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• 1991

This paper proposes a compliance robot control algorithm using fuzzy adaptive controller and fuzzy compliance vector generator. In the compliance robot control, we need more adaptivity because the linear modeling in robot dynamics is getting more difficult by contact with external environment. Existing adapitive controllers have difficulty in realtime processing. So in order to overcome it, We adopt fuzzy adaptive controller and propose fuzzy compliance vector generator for flexible compliant motion. We analyze and confirm the proposed algorithm by surface processing experiment with a control system implemented by VME system.

• 한국정밀공학회지
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• 제11권1호
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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.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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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).

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 추계종합학술대회
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• pp.877-880
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• 2005

DMB 서비스의 상용화 및 3D 게임, 휴대용 인터넷, 영화서비스 등의 멀티미디어 서비스를 위하여 최근 모바일용 기기에 VGA급 이상의 컬러 FPD의 채택이 본격화 하고 있다. VGA급 이상의 화면에 30fps의 실시간 동영상을 디스플레이 하려면 소프트웨어를 통한 구현방법은 프로세서의 성능이 이에 미치지 못하기 때문에 구현이 어렵고, 전용 하드웨어를 구성하여야만 풀 프레임의 동영상지원이 가능하다. 본 논문에서는 모바일 디스플레이 장치의 실시간 동영상 구현을 위한 flash memory controller, OLED interface로 이루어진 OLED 제어기를 제안하고 이를 FPGA로 구현하여 성능을 평가하고자 한다.

• 한국통신학회논문지
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• 제24권9A호
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• pp.1314-1321
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• 1999

본 논문에서는 현재 널리 사용되고 있는 상용 운영체제들 중에서는 빠른 응답 시간을 보장하고 있는 실시간 운영체제 3가지를 선정하여 이 실시간 운영체제들이 IMT-2000 기지국 제어기에 호 처리를 위해 사용될 경우 어느 정도의 성능을 보일 것인지를 실험하였다. 이를 위해서 무선 호 처리가 어떠한 방식으로 이루어지는지 분석하여 시스템 성능에 영향을 크게 미치는 기본기능요소들을 도출하였으며 분석된 내용을 중심으로 가상의 호 처리 실험 공간을 구축하고 일정 시간 운영해봄으로써 시스템의 성능에 병목현상이 되는 부분이 있는지 또 어느 운영체제의 성능이 다른 운영체제에 비해 우수한 성능을 보일 것인지를 비교 분석하였다.

• 한국인터넷방송통신학회논문지
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• 제11권1호
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• pp.53-59
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• 2011

본 연구는 RFID 리더에서 머신 팩터(Machine Factor)와 맨 팩터(Man Factor)를 네트웍상으로 실시간 전송하여 정확한 원가 계산이 가능하도록 한 실시간 생산 원가 계산 기능을 갖는 생산관리시스템에 관한 것이다. 이를 위하여 본 연구는 생산 설비 제어장치에 마이크로프로세서를 도입하였고, 생산 설비의 일측에 RFID 리더를 추가로 설치하였다. 제어부와, 작업의 시작과 종료 시 카드를 통과시키는 카드리더와, 산출된 머신 팩터와 맨 팩터를 PLC 통신포트, 직렬통신포트, 이더넷 통신포트 등을 거쳐 네트웍상의 서버로 전송할 수 있도록 하였다. 이에 따라, 본 연구는 생산원가나 정확한 생산효율을 실시간으로 산출할 수 있으므로 효과적인 생산관리가 가능하게 되어, 원가절감과 생산성 향상에 크게 기여할 수 있게 되었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.188-194
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• 2011

The purpose of this paper is to explain the implementation method in order to enhance stability and reliability of embedded system. In this research, Texas Instrument (TI)'s TMS570 MCU(Micro Controller Unit) is used to satisfy the standard of stability that is IEC 61508. IEC 61508 suggest SIL(Safety Integrity Level) from 1 to 4 and TMS570 is satisfied SIL3. Also, TMS570 can provide several stability functions can be used in realtime system. To use such functions, this paper suggest the solution about the defect that can be used in realtime system. In basic way TMR(Triple Modular Redundancy) suggested in addition to explain about the way to improve safety and reliability. Also this paper will suggest the method that reinforce the stability of calculation by using multiplex voter and memory.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.1234-1238
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• 2004

A Controlled neural networks are proposed in order to measure nonlinear environments in adaptive and in realtime. The structure of it is similar to recurrent neural networks: a delayed output as the input and a delayed error between tile output of plant and neural networks as a bias input. In addition, we compute the desired value of hidden layer by an optimal method instead of transfering desired values by backpropagation and each weights are updated by RLS(Recursive Least Square). Consequently, this neural networks are not sensitive to initial weights and a learning rate, and have a faster convergence rate than conventional neural networks. This new neural networks is Error Estimated Neural Networks. We can estimate nonlinear models in realtime by the proposed networks and control nonlinear models. To show the performance of this one, we have various experiments. And this controller call prove effectively to be control in the environments of various systems.

• 대한전기학회논문지:시스템및제어부문D
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• 제50권3호
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• pp.136-142
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• 2001

In this research a Simulink/RTW-baed realtime control system was developed for an induction motor vector control. On the Simulink window, the control system is designed in the form of block diagrams, program codes are produced automatically with the RTW(Real Time Workshop), then an DSP c compiler compiles the program codes. With this automatic program producing method rapid prototyping is realized with the least time-consuming manual programming procedures. To show effectiveness of the proposed system designing scheme a DSP-based induction motor vector controller was constructed and implemented.