Predictive condition monitoring of railway rolling stock

Stresses continue to increase on the rail infrastructure as axle loads and speeds increase and rolling stock maintenance costs conflict with time and economic constraints. Railroads are under increasing pressure to maintain their infrastructures while competing with other markets. Until recently, typical detector technologies have been developed from the track and structures perspective (and needs) and they reported forces acting on track structures. Rolling stock detectors have in general been exception- or alarm-based, reporting only after critical thresholds are exceeded. These detectors are not optimal for long-term observations, making them inappropriate for modern fleet and risk management. The Wayside Monitoring Alliance members share a common and alternative philosophy and their detectors are developed from the rolling stock perspective, measuring on tangent track at line speeds. These detectors (wheel profile (ImageMap), truck geometry (WID), wheel condition (Teknis) and bearing condition (Vipac)) are highly specific and sensitive and they provide two critical advantages - they offer long-term trending of vehicle parameters; and they report root data instead of effects or symptomatic results. This is possible through software designed to follow each parameter from the time it first varies from nominal and a low-level alarm is raised. The result is an ability to predict component failure and to proactively schedule checks and repairs to vehicles before they suffer extra damage and stress track and structures. Over several years the Alliance has developed an improved understanding of the inter-relatedness or coherence of the data from these detectors – and this is challenging some long held beliefs about managing rolling stock to cope with vehicle and track damage, risk and cost. Models are being created which predict the consequences of not acting promptly once rolling stock measurements vary from nominal values.

Media Info

  • Pagination: 12p.
  • Monograph Title: New horizons for rail: CORE 2004: conference on railway engineering, June 20-23 2004, Darwin, Northern Territory, Australia

Subject/Index Terms

Filing Info

  • Accession Number: 01517235
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Mar 4 2014 8:14PM