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정의진(Eui-Jin Joung),황종규(Jong-Gyu Hwang),이종우(Jong-Woo Lee) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
Testing evaluation is a part of process for design, production, evaluation, operation and abolition, and is the process of certifying system performance. The main purpose of testing evaluation is to reduce the risk factor under the determining process. Testing process has the three step such as design qualification, integration and validation test in factory, system integration and commissioning test. Design qualification is to verify errors on the design process. Integration and validation test in factory is for the H/W and S/W of an equipment and is to verify interface of subsystem, communication protocol and main functions. System integration and commissioning test is a functional test to adjust successful installation of equipment. According to the testing process, briefly consideration for test item, test method and test contents about signalling system is carried out.
정의진(Eui-Jin Joung),신경호(Kyung-Ho Shin) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
In this paper, the safety criteria and framework of railway software which is developing presently is examined. The software development capability and organization of railway company in korea are investigated through interview and are analyzed. Then the application plan for railway software safety criteria is deduced to apply criteria to railway industry effectively.
정의진(Joung Eui-jin),신경호(Shin Kyung-ho) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
Softwares in railway system are being used in the area of railway control system, directly associated to safety. Because the instinct characteristic of Software is uncertainty, Software development without safety insurance is very hazardous situation. In order to derive safety certification process in the railway system, certification and approval processes in the nuclear, aviation, and military area are studied. Software quality should be improved by two aspects : one is product aspect, another is process aspect. GS(Good Software) and ES(Excellent Software) certification can be exemplified in a product aspect approach. In those process certification, CMMI (Capability Maturity Model Integration) or SPICE (Software Process Improvement and Capability dEtermination ISO/IEC15504) is being used as models for assessing process maturity of organization. Following the studies, safety management procedure in the railway system is suggested.
정의진(Eui-jin Joung),신경호(Kyung-ho Shin) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
Safety critical systems are those in which a failure can have serious and irreversible consequences. Nowadays digital technology has been rapidly applied to critical system such as railways, airplanes, nuclear power plants, vehicles. The main difference between analog system and digital system is that the software is the key component of the digital system. The digital system performs more varying and highly complex functions efficiently compared to the existing analog system because software can be flexibly designed and implemented. The flexible design make it difficult to predict the software failures. This paper reviews safety standard and criteria for safety critical system such as railway system and introduces the framework for the software lifecycle. The licensing procedure for the railway software is also reviewed.
정의진(Euijin Joung),김길동(Gildong Kim),이한민(Hanmin Lee),이원대(Wondae Lee),이종기(Jongki Lee) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.4
In the platform of the urban transit system, a certain gap is inevitably made between the subway vehicle and the platform, and the gap gets wider in the curved area of the platform. This gap contributes to decrease passengers' safety. In this paper, we presents development process for safety step, trends of safety step, development plan, technical description and etc. In this study, we has considered safe operation of the subway vehicle when safety step are operated closely related to the doors, and explored the possibilities to put it into practical use.
정의진(Euijin Joung),이한민(Hanmin Lee),이장무(Changmu Lee),김길동(Gildong Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10
RAMS (Reliability, Availability, Maintainability, Safety) analyses are particularly important in the railway engineering sector and are increasingly required the specialized procedures. The analysis are processed following the lifecycle process. The purpose of the RAMS application is to derive Quantitative RAMS value and to find the value meet a proposed requirement and related standards. This paper represents the RAMS procedure to apply to the EMU (Electrical Multiple Unit) based on the referenced RAMS standards.