A NUMERICAL BUTTERWORTH FIBER FOR DIGITAL DATA PROCESSING WITH APPLICATIONS TO THE ANALYSIS OF TRACK GEOMETRY

This paper deals with the implementation of digital Butterworth filters having highpass, lowpass and bandpass characteristics. After outlining the underlying theory, examples of a sixth-order filter and a second order filter are discussed. In addition to the theoretical filter shapes, some experimental results obtained from a comparison of the Fourier transformed unfiltered and filtered records are presented. It has been concluded that these practical estimates closely fit the theoretical values, both for gain and phase shift.

• Corporate Authors:

  International Railway Congress Association

  17-21 rue de Louvrain
  1000 Brussels,   Belgium 
• Authors:
  • Esveld, C
• Publication Date: 1980-1

Media Info

• Features: Figures; References;
• Pagination: p. 35-44
• Serial:
  • RAIL INTERNATIONAL
  • Volume: 11
  • Issue Number: 2

Subject/Index Terms

• TRT Terms: Analysis; Data collection; Information processing; Inspection cars; Measurement; Railroad tracks
• Uncontrolled Terms: Track stiffness
• Old TRIS Terms: Analytical techniques; Track geometry measurement
• Subject Areas: Data and Information Technology; Railroads;

Filing Info

• Accession Number: 00312077
• Record Type: Publication
• Source Agency: International Union of Railways
• Files: TRIS
• Created Date: Jul 22 1980 12:00AM