Fundamental research on alignment irregularity estimation in curved section utilizing the accelerometer attached on axle-box

Abstract

The alignment irregularity of the track has major impact on the quality of passenger’s comfort and the running safety. Especially, the alignment irregularity directly affects the value of the derailment coefficient when the vehicle running on a sharp curve. The irregularity is normally measured by a track inspection car. Therefore, the measurement frequency is limited due to the cost of the measurement. In this paper, the alignment irregularity is estimated by using accelerometers attached to the axle-box. Using a multi-body dynamics analysis tool SIMPACK, the fundamental effectiveness of proposed estimation on curved section is mentioned.