• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.1545-1548
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• 1997

A Force-refecting hand controller can provide the kinesthetic information obtained from a slave manipulator to the operator of a teleoperation system. This thesis presents the desgn and the analysis of a 6-degree-of-freedom force-reflecting hand controller using fivebar parallel mechanism. The goal of this thesis is to construct a superior hand controller that can provide large workspace and good force-reflecting ability. The forward kinematics of the fivebar paprallel mechanism has been calculated in real-time using three pin-joint sensors in addition to six actuator position sensors. A force decomposition approach is used to comput the Jacobin. To analyze the characteristics of the fivebar parallel mechanism, it has been compared with the other three parallel mechanisms in terms with workspace and manipulability measure. The force-reflecting hand controller using the fivebar parallel mechanism has been constructed and tested to verify the feasibility of the design concept.

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.1778-1781
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• 1997

The coke oven plant on a steel works has not, in the past, been regarded as a prime user of modern instrument technology. The reason for this perception may be due to the fact that the basic design of the coke battery has been changed little over the years. The recording and analysis of oven pushing force on a routine basis is seen as a means of monitoring plant operation. A torque sensor is set up at the shaft of the rotor for measuring pushing force. Pushing force data which is communicated form torque sensor to staor by telemetry method are shown on MMI(Man-Machine Interface) screen and stored in the database automatically. Perhaps the most important feature is that is allows a problem oven to be identified at an early stage and for corrective action to be taken before it develops into a refusal to push. In this way the mechanical loads imposed on the battery structlure can be held to a necessary minimum, so helping to prolong its service life.

• Proceedings of the IEEK Conference
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• 2000.06c
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• pp.129-132
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• 2000

It is difficult to find web contents for visual disabilities in spite of rapid growing internet users, infrastructures and advance of computer technology. For the case of usenet newsgroup concerning disabilities, hit rate is even less than E-mail because of lack of accessibility, educational support and economical expense for internet. This paper is addressed to voice usenet newsgroup service by using telephone or web browser for visual disabilities without additional S/W support such as 775, usenet program and installation program, suggests a design method and an implementation example for it. Main features of it are easiness of man machine interface, popularity of access device such as telephone or web browser and independency of particular news server by using NNTP. This system supports general MIME format, is implemented for usenet server of Korean Social Worker's Community and will be implemented for Gomduri InfoNet BBS of Korean Society for Rehabilitation of Persons with Disabilities.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.11a
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• pp.121-126
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• 1996

월성1호기의 경우 운전원이 중수증기 회수계통 현장 검사(Survey)에 약 3시간 정도를 소요하고 있으며, 자료의 분석과 수집을 위해 각 기기 제어반(Panel)에 기록계(Recorder)를 설치하여 기록된 기록지를 통해서 작업해야 만 한다. 이처럼 기존 설비의 경우 운전원은 많은 시간과 작업 부담을 갖고 운전하게 될 뿐만 아니라 다른 계통을 점검하는데 필요한 많은 시간을 얻기가 어려운 형편이다. 그러나 PLC SYSTEM 내의 한 부분인 공정감시제어를 위한 MMI(Man Machine Interface) SOFTWARE를 사용하여 조사할 경우 약 3분이면 중수증기회수 전 계통을 점검할 수 있고, 경향감시(Trend) 기능을 사용하면 기록계 설치 없이도 과거나 현재의 변화 추이 및 문제점 분석은 물론 계통 결함 발생시 발생되는 경보기능으로 운전원의 신속한 인지가 가능하게 된다.

• Journal of the Korean Society of Safety
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• v.7 no.4
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• pp.105-114
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• 1992

This paper presents an study on the knowledge based system for diagnosing the fire causes using the Fuzzy Possibility Measure( FPM ) about the electric-fire ignition. The Ignition values needed for causes diagnosis is computed as FPM for electric-fire ignition based on the internal scale technique that assigns numerically the characteristic difference of facts to the-tin-ear scale. For the convinience of inference, ignition sources are classified into seven types : short, ground fault, leakge of electricity, overcurrent, cord junction overheating, bad Insulation and spark. The system for causes diagnosis of electric-fire is composed of Knowledge Acquisition System, Inference Engine and Man-Machine Interface, The diagnosis system is wrritten in an artificial intelligence langusge “PROLOG” which uses depth-first search and backward chaining schemes in reasoning process.

• Proceedings of the KIEE Conference
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• 1994.07a
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• pp.488-490
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• 1994

To meet the requirements of high performance and reliability as a industrial motor drive, we developed an integrated oil-line fault diagnosis and monitoring system which consists of DSP-based controller and PC-based MMI (Man-machine interface) program. The dedicated controller performs real-lime fault detections and protections. The MMI program monitors the on-line fault status of the drive system and offers full explanations of the fault name(WHAT?), deducible causes of the fault operation(WHY?), and chock points (HOW?) based upon the experiences of the expert. Also the TRACE data which was stored just before and after the accident can be scrutinized using MMI tools.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.11
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• pp.2001-2005
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• 2008

This paper presents a design of a simulation apparatus to evaluate an operational control algorithm for the PRT system. PRT systems require very short headways to increase the line capacity and a very reliable vehicle control algorithm for avoidance of the impact between vehicles. Therefore, it can be said that the development of an reliable operational control algorithm for the PRT systems is much more important than that of the hardware configurations. In this paper an apparatus is proposed which is composed of virtual vehicles, a central control system, a man-machine interface and monitoring device, making it possible for the designed operational control algorithm to be implemented and tested. For the test of the proposed apparatus a test operational control algorithm is designed and the experimental results show the effectiveness of the proposed simulation apparatus for test and evaluation of the PRT operational control algorithms.

• Journal of Korean Institute of Industrial Engineers
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• v.16 no.2
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• pp.11-21
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• 1990

With a general trend toward larger and more complex systems with centralized control, an operator's role of supervisory decision making in the control room becomes more important. Identification of potential man-machine interface (MMI) problems with CRT-based process control systems was attempted using a structured questionnaire survey. Based on the survey results, a laboratory experiment was carried out to investigate the performance of alarm detection on a process control CRT display. The user performance was measured in terms of reaction time from the onset of an alarm sound until the completion of predefined response procedures. The results revealed that for a highly complex tasks, mean reaction time ($\bar{RT}$) with a color consistent display was 10.5% faster than that with the original display, and $\bar{RT}$ with a grouped display was reduced by 8.2% in comparison with the color consistent display.

• Proceedings of the KIEE Conference
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• 1999.11c
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• pp.546-548
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• 1999

화력발전소 운전원 훈련용 시뮬레이터 개발시 제어 시스템을 구성하는 제어로직과 MMI(Man Machine Interface) 화면등의 모델 개발을 위해서는 많은 인력과 시간이 수반되는 일이지만 일일히 코딩을 하여만 실제 제어기능 및 화면기능을 구현할 수 있다. 하동화력발전소 운전원 훈련용 시뮬레이터에서는 제어시스템 개발의 생산성과 신뢰도를 향상시키기 위해 분산제어시스템 제어로직변환기를 개발하여 실제 발전소에서 사용중인 제어 로직파일을 제어 모델로 변환하여 시뮬레이터에 적용하는 방법을 이용하였다. 본 논문에서는 하동화력발전소의 분산제어시스템인 Simens Teleperm-ME에 적합한 제어 로직 변환기의 개발에 관하여 설명한다. 변환기를 통한 제어시스템의 모델링 방법은 첨단 제어 시스템의 기존 기능을 그대로 유지할 수가 있게 되어 제어기술자의 훈련 및 제어로직 개발 그리고 분석이 가능하며. 이를 통하여 운전원 훈련효과를 제고할 수 있고 실제 제어시스템과 완벽한 호환성을 유지함으로써 시뮬레이터의 정확성을 보증할 수 있게 된다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.10a
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• pp.350-354
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• 1995

The Tension Leveller of Cold Rolling Mill In POSCO performs levelling the strip in high speed line. But minor variations in operating condition of driving machines such as motor, gear box, and support bearings, a small gap-variation of supporter and strip slip by poor roll revolutions can cause serious problems in the quality of strip. In this study, firstly, A condition monitoring standard for each sensor is made through with the detail analysis of vibration and strip slip. Secondly, An automatic monitoring and diagnosing system was developed to monitor the condition of Tension Leveller, and diagnose the cause of abnormal condition. Finally, A diagnosing algorithm for abnormal condition and man-machine interface (MMI) for easy operation are developed.