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Smoothing 기법을 이용한 속도신호의 노이즈제거 및 가속도 추정
이강원(K. W. Lee),김명룡(M. R. Kim),온정근(J. G. Ohn),홍용기(Y. K. Hong) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
The velocity of train which is measured from pulse generator attached to TM is used for displaying or control signal of inverter and so on. Measured signals increase and decrease step-by-step by pulse counting or monotonously by F/V conversion. But noises and signal distortions by measuring error like alias make it difficult to provide correct velocity infomation and estimate the acceleration. In this paper, we investigated the performance of Smoothing method for suppressing the noises in velocity signals. And the difference between Smoothed signal and origin velocity signals is inspected and the comparison with low pass filtering show applicable of Smoothing method for noise rejection and the estimation of signal. Finally, acceleration curves estimated from Smoothing method are compared with real accelerator signal attached to train.
김연수(Kim Y.S.),목재균(Mok J.K.),장세기(Chang S.K.),홍용기(Hong Y.K),김용기(Kim Y.K.),김진완(Kim J.W.),김태형(Kim T.H.) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
A bi-modal tram has been developing to consist of articulated-two cars propelled by CNG hybrid (series type) in Korea since 2003. All wheels are driven by electrical motors independently, which can eliminate differential gears to reduce turning radius and make low floor to provide the old and the handicapped with easy access. In the bi-modal tram, therefore, reduction gear unit is key technology to make low floor and drive wheels independently. This study was aimed at performance evaluations of the reduction gear unit for the bi-modal tram. Oil leakage, oil temperature, vibration, acoustic noise in idle operations were measured for the reduction gear unit of the bimodal tram.
홍선호(S.H.Hong),왕종배(J.B.Wang),홍용기(Y.K.Hong),이원순(W.S.Lee) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
In this paper the cases on accidents/incidents and the reporting/responding procedures of high-speed rail operating countries will be reviewed and what these suggest us will be identified, and those countries" efforts to secure the prompt rescue system will be reviewed and the plan to secure the more customized rescue and rehabilitation system taking account into circumstances of our high-speed railway accident/incident will be presented.
정승섭(Seung Sub Jung),홍용기(Y. K. Hong),김재영(J. Y. Kim),박재흥(J. H. Park),변재홍(J. H. Beun),유병관(B. K. Yu) 한국철도학회 2019 한국철도학회 학술발표대회논문집 Vol.2019 No.11
트램은 도시재생효과와 더불어 친환경성, 중량 전철 대비 낮은 건설비, 저상시스템을 적용한 교통약자에 대한 배려 등 다양한 장점으로 다수의 해외도시에서 운행되고 있다. 대전시, 울산시, 위례신도시 등 국내에서도 트램 도입을 위해 많은 검토가 이루어지고 있다. 트램은 도로 교통과 동일 평면상에서 운행되므로 자동차와의 충돌, 보행자와의 접촉 등 안전사고에 자주 노출된다. 그러나 국내에서는 트램에 대한 운영 경험이 없기 때문에 사고 발생 시 대처방안과 사고복구에 대한 우려가 있다. 따라서 본 연구에서 트램 사고유형별 복구매뉴얼 및 복구장치 조사 · 분석을 통하여 트램 실증노선에서 발생이 예상되는 다양한 사고유형별 대응 조치 및 사복복구절차 매뉴얼을 개발하고 사고복구에 필요한 제작 가이드라인을 제시하는 기초자료로 활용하고자 한다.
정종덕(J. D. Chung),김정국(J. K. Kim),편장식(J. S. Pyun),김원경(W. K. Kim),홍용기(Y. K. Hong) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
This paper describes the structural analysis result and load test result of accident EMU(Electric Multiple Units). Structural analysis and load test of EMU were performed for the criteria of safety assessment. Structural analysis using commercial I-DEAS software provided important information on the stress distribution and load transfer mechanisms as well as the amount of damages during rolling stock crash. The purpose of the load test is to evaluate a safety which carbody structure shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load and operating condition. The results have been used to provide the critical information for the criteria of safety assessment.