Patent ID: 6119056
Filing Date: 2000-09-12
Classification: B61F

Abstract:
A method of generating a sensor signal related to a track banking angle of a banked section of track beings traverse by a train said method comprising the steps of: providing measured signal values for the train speed (v), for the angular speed of a train car chassis about the roll axis (.omega.R) for the transverse acceleration (aq), and for the yaw speed (.omega.G) of the chassis about the yaw axis; and determining a track-banking angle value (.PHI.g) from the rolling angular speed (.omega.R) and yaw speed (.omega.G) of the chassis about the yaw axis; and wherein the step of determining a track-banking angle (.PHI.g) includes: estimating the track-banking angle from the measured rolling angular speed (.omega.R) as a track banking angle (.PHI.gb); comparing this estimated track-banking angle (.PHI.gb) to a track banking angle (.PHI.gs) determined from the transverse acceleration (aq), the measured yaw angular speed (.omega.G) and the train speed (v), to provide a difference signal value (.DELTA..PHI.g); feeding back and filtering the formed difference signal value (.DELTA..PHI.g) to combine with the estimated track-banking angle (.PHI.gb) and provide a resulting, estimated track-banking angle (.PHI.b) representing the real track-banking angle (.PHI.g), which is drift-compensated and low-noise.