A railway vehicle fault detection system

Projekt:

Etablera systematiskt arbetssätt för att förbättra gångkomfort för passagerartåg -dålig gång

Sammanfattning:
Many different type of faults on track and vehicles may occur, which can cause a bad ride comfort. Passengers are normally no experts in vehicle dynamics and can therefore not tell the cause of the bad ride of the vehicle. What they can do is to complain for the staff work-ing in the train, telling there is a problem, and it doesn’t feel normal. The crew working in the train is also no experts in rail vehicle dynamics. For them it can be difficult to describe the vi-brations to make it easy for the workshop to find the problem. In the workshop there are limited possibilities to make test runs. Workshops do not normally have access to a test track. Example of possible faults:
 The fault can be in the vehicle. Different faults in different suspension components can occur. E.g. oil leakage in hydraulic dampers, ice and snow blocking the motion in dif-ferent suspension parts.
 The fault can be in the contact points between vehicle and track. Unfavorable shapes of wheel and/or rail profiles can lead to instabilities.
 The fault can be in the track. When looking at track quality according to UIC 518 and EN 14363 only wavelengths in the range of 3-25[m] are considered. The vibration fre-quencies can be outside this frequency span.
The bad ride comfort can be a combination of more than one single fault. E.g. a tight gauge in combination with hollow wheel profiles and ineffective yaw dampers. In some cases it can take long time to find the fault(s). It can happen the vehicle needs to go to the workshop more than one time before the fault(s) have been corrected.

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Författare: Ingemar Persson Desolver, Matthias Asplund Trafikverkt
Utgivare: Taylor & Francis
Utgivningsdatum: 2017-08-14
Diarienummer: TRV 2017/14820
Antal sidor: 5
Språk: Engelska
Kontaktperson: Matthias Asplund, UHttu