Performance evaluation of estimation method for wheelset motion state using a single-wheel creep-force model with instrumented wheelset

Abstract

The purpose of this study is to build an evaluation method of a railway running safety more realistically using information about contact condition between wheel and rail in a railway vehicle. To achieve this purpose, the authors have proposed an estimation method for motion variables of a wheelset and friction coefficient between wheel and rail by observer based on a Kalman filter using a single-wheel creep-force model with an instrumented wheelset. In the previous studies, the authors mainly have examined effectiveness of the proposed method using numerical simulations but scarcely have been carried out investigation using measurement data. This paper reports the results of the validity test of the proposed method using the measurement data and simulation data mimicking them. The verification results show that the proposed method managed to estimate reasonable values of the friction coefficient, the lateral displacement of the wheel/rail contact point in outer side and the angle of attack in the curve section to some extent.