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선박엔진 통합시스템의 실시간 고장진단 기법에 관한 연구
정경열(K.Y.Chung),김달현(D.H.Kim),류길수(K.S.Rhyu) 한국해양대학교 해사산업연구소 1999 海事産業硏究所論文集 Vol.9 No.-
This paper presents the diagnostic method of an integration system where both diagnosis system and monitoring system are combined. Knowledge base for ship engine fault diagnosis is implemented using hybrid knowledge representation technique by EE(Element Expert) shell, and using a certainty-factor method to handle uncertainties of evidences and rules. Whenever alarm occurs, the monitoring system sends alarm data to the diagnosis system. At the same time, the diagnosis system converts alarm data type to diagnosis data type, verifies alarm data, and calculates data's trend. To map alarm data to evidences of knowledge base, the diagnosis system uses two databases. The real-time diagnosis results are provided by a reasoning mechanism implemented using visual C++ for driving OLE automation server of EE shell.
Cnet 프로토콜을 이용한 PLC간의 다중무선통신 방법에 관한 연구
정경열(K.Y.Chung),이후락(H.R.Lee),장경선(K.S.Jhang),류길수(K.S.Ryu) 한국마린엔지니어링학회 2004 한국마린엔지니어링학회 학술대회 논문집 Vol.2004 No.-
This paper addresses the design and implementation of a wireless network, proposed as a cost-effective support platform for PLCs. With this network, one or more supervising stations may access remote equipment like PLCs. An applicable communication methods are described, capable of dealing with the peculiarities and contending system requirements. The paper specifies these requirements and indicates methods to fulfill them Also, it provides to the model of operation, and focuses on the implementation approach. The hardware and software design is described together with a number of critical points related to wireless communication on the Cnet<br/> Furthermore, a discussion on system expandability and performance is taking place and, finally, some observations are stated. The main conclusion is, that the proposed method can feature good performance under normal operating conditions, affordable cost<br/>
확신도 기법을 적용한 선박엔진 고장진단 전문가시스템 구현에 관한 연구
정경열(K.Y.Chung),최욱현(W.H.Choi),임헌호(H.H.Lim),류길수(K.S.Rhyu) 한국해양대학교 해사산업연구소 1998 海事産業硏究所論文集 Vol.8 No.-
This paper presents the design and implementation of a diagnosis system incorporating with a monitoring system. We classified the ship engine into the sub parts as similarly a experts classification method, acquired the causal relation between measuring data and fault states in consultation with experts, constructed a rule-base using them, and adopted a certainty-factor method in order to handle uncertanties of evidences and rules. When alarms occur, the system infers diagnostic conclusion by using certainty factor obtained from an alarm state (one of 4 levels) and an alarm datum's trend (one of 3 levels), and the certainty factor of a related rule (one of 3 levels).
[학술강연] 전기전도도를 이용한 파울링 진단기술에 관한 연구
정경열(K.Y.Chung),이후락(H.R.Lee),문전수(J.S.Moon),이수태(S.T.Lee),류길수(K.S.Rhyu) 한국마린엔지니어링학회 2002 한국마린엔지니어링학회 학술대회 논문집 Vol.2002 No.-
Fouling causes serious maintenance problems on heat exchanger tubes and process facilities. To avoid such fouling problems, numerous efforts have been tried, e.g., diagnosis of fouling, reducing and eliminating the fouling, etc.. The objective of the present study is to develop an innovative diagnostic system of fouling, which can detect the scaling attached to the wall non-homogeneously. The performance of the diagnostic system has been evaluated with a scaling simulator that generates scaling on tested tube wall. The measured values with the diagnostic system were compared with the amounts of the scaling generated by the simulator.
선박 기관실 실시간 모니터링 시스템의 HMI 구현에 관한 연구
정경열(K.Y.Chung),최욱현(W.H.Choi),류길수(K.S.Rhyu) 한국해양대학교 해사산업연구소 1998 海事産業硏究所論文集 Vol.8 No.-
In this paper, the design and implementation of HMI for a real-time monitoring system of ship engine room is presented. The monitoring system gets sensor data of real-time from distributed local units after processing data, displays at CRT and saves in the database. The proposed system consists of four modules, the data management module, the alarm management module, the user interaction module, and the display module. The data management module transfers raw data from a device to engineering data. The alarm management module checks the alarm status of data received from local units. If the alarm occurs, data are displayed at CRT and saved at database.
[학술강연] 플라즈마를 이용한 박용엔진 저온 탈질 설비에 대한 연구
정경열(K.Y.Chung),송영훈(Y.H.Song),동은석(E.S.Dong),이수태(S.T.Lee),김진영(J.H.Kim),류길수(K.S.Rhyu) 한국마린엔지니어링학회 2002 한국마린엔지니어링학회 학술대회 논문집 Vol.2002 No.-
In this paper, we study NH₃ De-NOx SCR (Selective Catalyst Reduction) technology of marine engine for low temperature (below 250 C) exhaust gas.<br/> This technology can remove max 80% NOx in exhaust gas under low gas temperature (below 250C) condition using combined non-thermal Plasma and Ammonia SCR method.<br/>
송치성(C.S.Song),정경열(K.Y.Chung),오상훈(S.H.Oh),이후락(H.R.Lee),이수태(S.T.Lee) 한국마린엔지니어링학회 2003 한국마린엔지니어링학회 학술대회 논문집 Vol.2003 No.-
The objective of the present study is to develop an innovative diagnostic and reduction system of fouling, which can detect and reduce fouling. We developed apparatuses by U-coefficient and ultrasonic methods for fouling reduction and diagnosis. The measured values with the diagnostic system was compared with the amounts of the scaling generated by the simulator