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도시철도차량 제동장치의 솔레노이드 밸브에 대한 전류기반 고장진단기법 개발
서보성(Boseong Seo),이규석(Guesuk Lee),조수호(Soo-Ho Jo),오현석(Hyunseok Oh),윤병동(Byeng D. Youn) 대한기계학회 2016 大韓機械學會論文集A Vol.40 No.9
국내 도시철도차량의 유지보수는 대부분 예방정비에 기초하고 있다. 기존 유지보수 방법의 한계를 극복하기 위해, 상태기반 유지보수기법을 철도차량에 적용하려는 움직임이 최근 활발히 진행되고 있다. 본 연구는 도시철도차량 제동장치의 핵심 고장부품인 솔레노이드 밸브에 대하여 전류기반 고장진단기법 개발을 시도하였다. 주요 고장부품으로 선정된 솔레노이드 밸브에 대하여, 등가회로모델 및 온도 보상된 전류 감시에 기반한 고장 진단법을 제안하였다. 제안한 고장 진단법의 유효성을 검증하기 위해 실제 도시철도차량에 사용되는 솔레노이드 밸브(상용제동 전자밸브)를 이용하여 사례연구를 진행했다. 본 연구는 철도차량 제동장치의 솔레노이드 밸브 고장진단이 추가 센서의 장착 없이 가능함을 보여주었고, 철도차량의 안전성 및 신뢰성 향상에 도움을 줄 것으로 기대한다. In Korea, urban railway cars are typically maintained using the strategy of predictive maintenance. In an effort to overcome the limitations of the existing strategy, there is increased interest in adopting the condition-based maintenance strategy. In this study, a novel method is proposed to detect faults in the solenoid valves of the braking system in urban railway vehicles. We determined the key component (i.e., solenoid valve) that leads to braking system faults through the analysis of failure modes, effects, and criticality. Then, an equivalent circuit model was developed with the compensation of the temperature effect on solenoid coils. Finally, we presented how to detect faults with the equivalent circuit model and current signal measurements. To demonstrate the performance of the proposed method, we conducted a case study using real solenoid valves taken from urban railway vehicles. In summary, it was shown that the proposed method can be effective to detect faults in solenoid valves. We anticipate the outcome from this study can help secure the safety and reliability of urban railway vehicles.
조수호(Soo-Ho Jo),오현석(Hyunseok Oh),윤병동(Byeng D. Youn),서보성(Boseong Seo) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Solenoid valves are widely used for the control of braking systems in urban railway vehicles. Due to the prevalence and criticality of solenoid valves in the braking systems, it is desirable to understand the dynamics of solenoid valves. Moreover, with the in-depth understanding, an efficient physics-based approach can be developed to diagnose the condition of the solenoid valves. To this end, this paper attempted to develop a multiphysics analytical model to predict the dynamic behavior of the solenoid valves. Complex interaction between electromagnetics, fluidics, and mechanics is analyzed. The dynamic behaviors are mathematically formulated using ordinary differential equations in conjunction with their physics. The differential equations are solved with numerical methods. Lastly, the performance of the multiphysics analytical model is evaluated by comparing the modeling and experimental results. We anticipate that the proposed model is useful to predict the dynamic behavior of the solenoid valves since it does not require high computing power compared to computational fluid dynamics (CFD) software packages.