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도시철도 차량의 스마트 유지보수 시스템과 기존 관리 시스템의 기능적 연계에 관한 연구
윤화현,서경수,송정훈,신세현 한국도시철도학회 2023 한국도시철도학회논문집 Vol.11 No.4
도시철도의 운영에서 차량 유지보수는 핵심 활동으로 유지보수의 효율성 증대를 통한 비용 절감과 차량의 고장을 예방하여 안정적인 서비스 수준을 유지하는 것이 매우 중요하다. 본 논문에서는 도시철도 차량의 스마트 유지보수 시스템 개발을 대상으로 기존의 차량 유지보수 관리 시스템과의 기능적 연계와 시스템 운영방안에 대해 제시하였다. 본 연구를 통해 도시철도 차량에 CBM 및 스마트 유지보수 도입과 적용에 있어 목표 효과를 얻기 위해 기존 관리 시스템과 어떠한 상호작용 및 연계가 이루어지는지 등 그 사례를 바탕으로 관련 적용과 연구에 시사점을 제시하고자 하였다. Optimized maintenance is crucial to maintaining cost-effective, prevent failure, and railway transportation service level. In this paper, we present data integration and functional link on smart maintenance system with existing rolling stock maintenance management system. Through this study, we tried to suggest implications for related studies based on the case, such as how to interact and link with the existing management system to obtain the target effect in the introduction and apply of CBM and smart maintenance to urban railway rolling stock.
윤화현(H. H. Yoon),신건영(K. Y. Shin),이희성(H. S. Lee) 한국도시철도학회 2016 한국도시철도학회논문집 Vol.4 No.3
Safety management system of the railway was introduced for the maintenance of the railway vehicle. Safety management system requests for the activities of reliability management system associated with the Reliability Centered Maintenance. Thus, in order to apply the process of RCM(reliability centered maintenance), auxiliary power supply unit is selected among the 13 major units in trainset. auxiliary power supply is the significant impact item in terms of service failure and the failure rate is also the highest. So, 59 components in auxiliary power supply unit were selected and statistical analysis was performed through analysis of the field data collected during commercial operation.. The maintenance work in the future should be based on the reliability analysis results. Also, the reliability analysis may be the starting point for RCM required by the safety management system of the railway.
지하터널에서 주행하는 전동차의 하부에서 발생한 입자의 이동경로 예측
이경란,김원근,육세진,우상희,김종범,배귀남,박형구,윤화현 한국입자에어로졸학회 2015 Particle and Aerosol Research Vol.11 No.1
In this study, the flow around a subway train running in an underground tunnel was numerically estimated. For the validation of the numerical results, the airflow velocity at a point underneath a subway train was measured using an ultrasonic anemometer. Then, the trajectories of particles generated at the contact points between the wheels and rails were numerically predicted. By considering the airflow velocity and particle trajectories, the space underneath the T-Car (trailer car) was expected to be appropriate for the room for the installation of a dust-removal system.
서경수,한현수,윤화현,황문세,홍민기 한국철도학회 2022 한국철도학회논문집 Vol.25 No.12
To achieve performance goals through resource input in urban railway rolling stock operation, it is important to use rolling stock optimized for operating conditions. In this paper, we analyzed the efficiency of Seoul Metro Line 7 & 8 rolling stock maintenance operations using DEA; this involved comparing the TE(Technical Efficiency), PTE(Pure Technical Efficiency), and SE(Scale Efficiency) of identical type rolling stock operations on different operation lines. Also, the status of scale efficiency in the relationship between input and output was investigated. It was confirmed that, if the same rolling stock was operated on a line with long route length and high passenger demand, there was large deviation between lines in both technical efficiency and pure technical efficiency; there was also a difference in status of scale efficiency. Through this study, we suggest implications for various aspects of decision-making, such as establishing strategies for optimizing rolling stock operation and maintenance of urban railroad operators.
도시철도 차량 유지보수 운영효율 연구: 서울 도시철도 8호선을 중심으로
서경수,김용욱,윤화현,한재현,이동훈 한국철도학회 2019 한국철도학회논문집 Vol.22 No.9
Maintenance of rolling stock is a key activity in the operation of urban railways. Optimized maintenance iscrucial to maintaining cost-effectiveness, preventing failure, and maintaining urban rail service level. In this paper, weanalyzed the maintenance efficiency of rolling stock using DEA (Data Envelopment Analysis), focused on Seoul MetroLine #8. In addition, based on the DEA results, we analyzed the effect of system failure on the efficiency and foundthere were significant effects for failures of High Voltage, Brake, Bogie, Auxiliary Power Supply, Passenger AddressEquipment, Inverter Propulsion Equipment, Electric devices, and TCMS. Especially, it was confirmed that the occurrenceof faults in the Auxiliary Power Supply, Bogie, and High Voltage equipment has a relatively large effect on efficiency. This study provides implications for the prevention of certain equipment failure of rolling stock, showing that itis important to maintain the service level of operational rolling stock and the urban railway.
서울도시철도 7호선 신형전동차 대차프레임 구조 안전성 평가 연구
신익현(I. H. Shin),윤화현(H. H. Yoon),노학락(H. N. Noh),김성명(S. M. Kim) 한국도시철도학회 2014 한국도시철도학회논문집 Vol.2 No.3
With the development of vehicle production technology of recent, balance development of the standard model of urban rail operating agency-specific requirements are met, such as improved safety and convenience of maintenance, the ride is needed. In this study, the structure in dynamic load Below check the static strength through the analysis of the static load test results bogie frame, which is the main component of the travel device developed in line 7 new train and repeatedly acts I was verified a safe manner. The priority application standards for performance testing of urban rail vehicle and the results of structural analysis, to assess the safety due to fatigue endurance lead, load conditions applied to the load test, the fatigue test by applying the CODE615-4 standard UIC was conducted.