Investigation on Influence of Creep Force Saturation on Estimation Performance of Wheelset Angle of Attack by Kalman Filter Based on Constitutive Law of Creep Force

Abstract

Angle of attack between a rail and a wheel of a railway vehicle is an important physical quantity for evaluating the curve passing performance because the derailment occurring at curved tracks is related to it, though it is difficult to be measured continuously and easily. The authors have proposed the continuous estimation method of it using Kalman filter based on the constitutive law of the creep force. The numerical calculation results show that the proposed method can estimate continuous responses for the angle of attack qualitatively. However, in the proposed method, there still remain problems which be considered from the viewpoint of accuracy. This paper states the investigation results about the performance of proposed method from the viewpoint of the dependence on the saturation of the creep force.