• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 학술대회 논문집
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• pp.327-331
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• 2005

This paper gives the information for fault and malfunction of the Elevator for the passenger. For analyzing the fault and malfunction of the elevator equipment we research the report of fault and malfunction which is written by ATP electric director and Elevator maintenance company during recently one year. We analyze the number of fault and malfunction according to classified by month, season, time and classify the kind of fault and malfunction such as stop, fault of door, malfunction of floor indication and so on. And now we research fault and malfunction for the power quality such as Sag, Swell, Interruption, Harmonic, electric voltage rise and so on at elevator equipments and are testing Elevator imitation equipment.

• Journal of Advanced Marine Engineering and Technology
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• 제27권1호
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• pp.42-48
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• 2003

In general many engineers can diagnose the fault condition using the abnormal ones among data monitored from a diesel engine, but they don't need the system modelling or identification for the work. They check the abnormal data and the relationship and then catch the fault condition of the engine. This paper proposes the construction of a fault diagnosis engine through malfunction data gained from the data fault detection system of neural networks for diesel generator engine, and the rule inference method to induce the rule for fuzzy inference from the malfunction data of diesel engine like a site engineer with a fuzzy system. The proposed fault diagnosis system is constructed in the sense of the Malfunction Diagnosis Engine(MDE) and Hierarchy of Malfunction Hypotheses(HMH). The system is concerned with the rule reduction method of knowledge base for related data among the various interactive data.

• 한국안전학회지
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• 제17권1호
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• pp.45-53
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• 2002

The purpose of this study was to investigate effect of electrical noise on malfunction of the earth leakage circuit breaker. A three-way experiment for studying its malfunction was conducted, in which electrical products such as radio, alternating current are welder and cellular phone, distance from the earth leakage breaker to electrical products, and whether or not the earth leakage breaker is contained is contained in the steel box were employed as experimental variables. Eleven earth leakage breakers frequently used in real situations were tested in each experimental treatment. The electrical products were used for generating electrical noise that is known to be able to cause malfunction of the earth leakage breaker. The results showed that except a case for one of the 11 earth leakage breakers when the radio made by M company was located 30 cm ahead of the breaker, malfunction did not occur in any other experimental treatment. Consequently, it is suggested that the breaker should be normally used for preventing electricity-related accidents without fear of its malfunction in industrial sites.

• 지능정보연구
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• 제4권1호
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• pp.115-131
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• 1998

Customer service process is one of the most important processes in today's competitive business environment. Among the various activities of customer service process, equipment malfunction diagnosis activity should be performed fast and accurately. When a customer calls the service center and reports the observed symptoms, he/she describes them in layman's terms. Therefore, the customer-reported symptoms have not been considered helpful information for service representatives. However, in order to perform diagnosis activity fast and accurately, we need to make use of the customer-reported symptoms actively. In this research, we developed three systems called R-EMD (Rule-based Equipment Malfunction Diagnostic system), C-EMD (Case-based Equipment Malfunction Diagnostic system) and R&C-EMD (Rule & Case-based Equipment Malfunction Diagnostic system), each of which diagnoses equipment malfunctions using the customer-reported symptoms. R&C-EMD is a hybrid system that utilizes both rule-based and case-based technologies. The diagnosis rules used in R&C-EMD and R-EMD were not acquired from service manuals or interviews with service representatives. Rater, we extracted them directly from the past diagnosis cases based on symptoms' frequencies. By this way, we were able to overcome the knowledge acquisition bottleneck. Using the real 100 malfunction diagnosis cases, we evaluated the performances of R&C-EMC, R-EMD and C-EMD in terms of speed and accuracy. In diagnosis time, R&C-EMD took longer than R-EMD and shorter than C-EMD. However, R&C-EMC was the best in accuracy.

• 전자공학회논문지T
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• 제36T권4호
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• pp.9-16
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• 1999

본 논문에서는 복사 전자기장 내성 시험 시스템 내에서 컴퓨터 비젼을 이용한 EUT(Equipment Under Test) 오동작 판정 자동화를 위한 영상인식 알고리즘을 제안한다. 전자계측장비와 의료기기 등의 계수표시창의 수치변화나, PC 모니터 장비에서의 영상변화를 통해서 복사 전자기장 내에서의 EUT 오동작을 모니터링 및 분석한다. 즉, 비디오 카메라의 모니터상에 나타난 계수표시창의 수치를 인식하거나 기준영상과 챔버 내에 전자기장에서의 대상영상과를 비교함으로써 오동작 여부를 판정한다. 제안된 영상인식 알고리즘을 사용함으로써 EUT 오동작 판정 여부의 근거를 제시할 수 있으며, 내성검사에서의 오동작 판정의 번거로움을 방지할 수 있다.

• 조명전기설비학회논문지
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• 제21권2호
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• pp.78-85
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• 2007

승강기 운행 중 갇힘, 급상승, 급정지, 층 표시 오류 등 승객의 불안감을 유발시킬 수 있고, 인명 사고와 연결될 수 있는 오동작 사고가 발생을 하고 있다. 하지만 이런 부분이 현장 재연성이 거의 없고, 발생했다 사라지는 현상이기에 사실상 사고 원인 판명이 어려운 것이 현실이다. 따라서 본 논문에서는 이런 갇힘 및 오동작을 발생시킬 수 있는 원인을 분석하기 위하여, 최근의 승강기 모델 3개를 대상으로 EN12016(2004) 규정에 따라 내성시험을 하고 그에 따른 승강기 동작 특성을 분석하였다. 또한 오동작에 대한 대책을 보강한 후에 다시 시험하여 그 성능을 평가하였다. 분석 결과는 최종적으로 승강기 설비의 오동작에 대한 상호 연관성 분석 및 승강기 설비의 전기적 장해에 대한 대책을 제시하는데 자료로 이용될 것이다.

• 제어로봇시스템학회논문지
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• 제4권4호
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• pp.506-516
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• 1998

In this paper, an algorithm is proposed to detect the malfunction of plasma-etching characteristics using EPD signal trajectories. EPD signal trajectories offer many information on plasma-etching process state, so they must be considered as the most important data sets to predict the wafer states in plasma-etching process. A recent work has shown that EPD signal trajectories were successfully incorporated into process modeling through critical parameter extraction, but this method consumes much effort and time. So Principal component analysis(PCA) can be applied. PCA is the linear transformation algorithm which converts correlated high-dimensional data sets to uncorrelated low-dimensional data sets. Based on this reason neural network model can improve its performance and convergence speed when it uses the features which are extracted from raw EPD signals by PCA. Wafer-state variables, Critical Dimension(CD) and uniformity can be estimated by simulation using neural network model into which EPD signals are incorporated. After CD and uniformity values are predicted, proposed algorithm determines whether malfunction values are produced or not. If malfunction values arise, the etching process is stopped immediately. As a result, through simulation, we can keep the abnormal state of etching process from propagating into the next run. All the procedures of this algorithm can be performed on-line, i.e. wafer to wafer.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.800-803
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• 1996

Because of using electrical technologies in the automobile system. It is difficult to detect and recover malfunction of the automobile system. Only the skillful repair engineers could find and repair their problems in these days, but their inconsistent knowhow make it hard to accumulate their knowledge. This paper presents the relations between the engine ignition line and the malfunction of the automobile.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 춘계학술대회 논문집 전기설비전문위원
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• pp.34-36
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• 2006

The number of confine-disease of elevator increases every year and then sudden rise, sudden stop, error of level indication, stand; those can bring to uneasiness of elevator passenger and malfunction accidents related life accident are increasing. For confirmation those malfunction accident, we are measuring and analyzing power quality(Sag, Interruption, Harmonic) of the actual site and evaluated the performance for stop and stating by testing the two imitation test equipment with EN12016(2004) standard level. This paper will be used data of the analysis for mutual relation between Power Quality and malfunction and fault of elevator.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전력기술부문
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• pp.316-318
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• 2005

Increasing elevator system every year that is directly connected passenger's safety and connected peculiarity Reliability of each variety equipment that is composing elevator is linked with passenger's safely, and prevent accident is important. Malfunction by electric part of elevator system that is composing elevator is not easy to examine closely the cause. Estimation about malfunction of component by electric power quality must consist among them. In this paper, inspect elevator accident figure to examine effect that electric power quality gets on elevator that see and presented thing for research direction and necessity of electric safety consideration by such electric malfunction.