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고속철도의 한국형 열차제어시스템 개량에 대한 위험도평가 연구
신덕호,신경호,조현정,이강미,채은경 한국철도학회 2023 한국철도학회논문집 Vol.26 No.9
The Korean train control system (KTCS-2), developed as a national R&D project, satisfies international standards for reliability, availability, maintainability, and safety in the railway field, and is compatible with the standardized European train control system (ETCS). Evaluation by domestic and foreign conformity assessment (ISA) bodies has been completed. In addition, the Korean-style train control system, which has been verified in function, reliability, and safety by carrying out a pilot project on the Jeolla Line, has become an alternative to aging high-speed train control systems introduced with foreign technology. The European Union Railroad Safety Act mandates quantitative management of safety by applying Common Safety Technique (CSM) risk assessment (RA) when constructing or improving a system closely related to railroad safety, such as a train control system. In this paper, safety due to improvement is evaluated by quantitatively evaluating the risk of the existing high-speed rail train control system and KTCS-2.
신덕호(Shin ducko),이재호(Lee Jae-Ho),이강미(Lee Kang-Me),김용규(Kim Young-Kye) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper is about the study on the failure mode identification of railway signaling embedded system thru which quantitative reliability and safety can be compared reciprocally. Frequency of each failure mode makes possible to compare the reliability of each system and frequency of dangerous failure is used as the measurement standards for system safety. Therefore, this paper provides both reliability-related failure mode and safety-related failure mode by modeling the railway signaling embedded system.
내장형 철동신호제어시스템의 정량적 RAMS 평가에 관한 연구
신덕호(Ducko shin),이종우(Jong-woo LEE),김종기(Jong-ki KIM),이영훈(Young-hun LEE),김백현(Back-hyun KIM),이기서(Key-soe LEE) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper is presented to a theory comparing each different systems by quantitatively analyzing reliability, availability, maintenance and safety. Reliability R(t) produced by the method here is used for MTBF calculation of system as reliability of normal state. It is possible to produce the failure rate of unsafety state through modelization of system only to use the failure rate, after yielding the failure rate of failure mode to each un safety sate in case that unsafety state is defined with the function of systems applied.
한국형고속철도 열차제어시스템 사후유지보수도 평가에 관한 연구
신덕호(Shin Ducko),이재호(Lee Jaeho),이준호(Lee Junho),이강미(Lee Kangmi) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper for the Train control system which has been used in the railway system for the purpose of headway control is regarded as safety-critical system, which is based on embedded controller. Therefore, for the maintainability, the maintenance time shall be predicted correctly in order to improve availability of railway system and the predictive values shall be proved through the test. In conclusion, for the maintainability of train control system, the solution for exact prediction based on related international standard and the system for justification of derived predictive values shall be proposed.
신덕호(Ducko Shin),김건엽(Gonyop Kim),오세찬(Sehchan Oh),윤용기(Yong-Ki Yoon) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
System safety is defined as the state where the hazard risks due to internal system interface operation and maintenance are controlled as acceptable levels. It is represented and evaluated either with the risk level of each risk factor with the consideration of operation environments or with Safety Integrity Level (SIL) which is the system functional safety without considering application environments. The assessment results are issued in forms of certificates and they are reused in many cases. However the conditions and restrictions for different application environments vary in each case therefore additional evaluation on the preconditions of assessment in comparison with the actual application environment must be carried out. For the area of train control TR 50506-1 has been established based on the IEC 62425 (international standard for safety of train control system by RSSB) and EN 50129 (Europe standard) for the further assessment. In this paper the analysis on TR 5056-1 has been conducted in depth. The purpose of the study is to determine the requirements for inter-acceptability including scope procedures principles examination and suitability. The results can be utilized for the system safety maintenance when new devices or components are introduced in conventional systems.