영업열차에서 측정한 가속도를 이용한 궤도 유지보수 적용성 고찰

초록

This study examines the applicability of on-board acceleration data for track maintenance by analyzing axlebox, bogie, and car-body accelerations measured at 4,000 Hz on KTX train No. 36 across low-, mid-, and high-frequency bands. A three-stage procedure comprising frequency-band Butterworth filtering, position-referenced moving RMS calculation, and statistical anomaly detection was applied, and the results were cross-validated against 20 track geometry exceedance locations and 388 rail defect locations on the Gwangmyeong？Osong section. The bogie low-frequency band (10？40 Hz) captured 40.0% of track geometry exceedances, while multi-band integration covered 14.9% of rail defects within ±50 m. Locations flagged as anomalous across multiple frequency bands simultaneously showed higher correspondence with actual defects than those detected in a single band alone. These findings confirm that commercial train acceleration data can be effectively utilized for track maintenance, and further systematic research is needed to enhance its practical applicability.

키워드