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박은천(Eunchurn Park),강형구(Hyung-Goo Kang),최준성(Jun-Sung Choi),김은성(Eunsung Kim),김만철(Man-Cheol Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
In this paper with the background features on which measuring the transverse left-right and up -down vibration of wheel bogie and body by wireless measurement system performance evaluation systems which can assess the running behavior of high speed trains based on UIC code 518-OR and evaluate the ride comfort of them based on ISO code 2631 and UIC code 513 were developed. The characteristics of dynamic vibration are generally analyzed by an acceleration of a car body of high speed train and the acceleration can be applied to evaluation of running safety. In this paper also matching system of distance from tachometer and vibration from accelerometer was programmed in development software and the SD card embedded system which prevent to loss of data in wireless measurement was mounted on this system. Finally the software perform to analysis with filtering and statistical post-process in the unit sections and zones and focus on developing the capability monitoring in the main control center. For the verification of this system the running behavior and safety factor were analyzed based on field measured data of the Cheonjun-gunnum-sun turn out point in the new KTX railway.
차량의 가속도 진동계측 및 차량안정성 프로그램 개발에 대한 연구
김성용(Sung-Yong Kim),박은천(Eunchurn Park) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
In this study, vertical and horizontal accelerometers were installed at the both side of car body and tachometer was installed on the bogie, for the purpose of stability analysis of Korail Airport Express Train during driving. By applying the developed algorithm, the peak-to-peaks of horizontal and vertical acceleration which were matched with location by tachometer were found and compared with the threshold values. The threshold values per velocities which were presented in the "Metro Train Performance Criteria" were applied here. The validity of the developed algorithm was shown by comparing the site investigation and the measured values at frost heave locations.
김성용(Sung-Yong Kim),박은천(Eunchurn Park) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
In this study, to grasp the stability of train and to identify the track irregularity, the algorithm was proposed. As the track deformation occur due to running train, the dynamic characteristics of train show non-linearity. The representative transfer functions of wheel to car response were calculated from the frequency response functions which were estimated from measured triaxial accelerations. The measured acceleration responses were compared with the estimated responses from filtered acceleration outputs. This result could show the non-linearity of train system at the location of track deformed. The proposed algorithm was verified by matching with the site investigation.