Creep curve measurement to support wear and adhesion modelling, using a continuously variable creep twin disc machine

http://www.nt.ntnu.no/users/skoge/prost/proceedings/ifac11-proceedings/data/html/papers/2904.pdf

Contact Force Estimation in the Railway Vehicle Wheel-Rail Interface

This paper details a range of work carried out by the authors within the general theme of advanced condition monitoring possibilities for rail vehicle bogies. Maintenance of rail vehicle bogies represents one of the largest areas of whole vehicle running costs and their efficient operation is of safety critical importance to the entire rail system. Currently the majority of maintenance is carried out on a scheduled basis which can be time consuming, costly and potentially not effective at fault detection. This paper reviews concepts that could allow real time detection of the condition of the bogie so as to reduce vehicle out of service time and improve safe operation. Concepts reviewed are: the use of condition monitoring for detection of suspension component condition; detection of low adhesion conditions; and assessment of the wheel-rail interface condition.

/pdf/condition-monitoring-of-rail-vehicle-bogies-865d95keow.pdf

Condition monitoring of rail vehicle bogies

Low adhesion in railway vehicle wheel/rail contact can create large cost and punctuality issues for train operators and users. There is currently a lack of real time knowledge of the running conditions on networks, therefore the work reported here proposes a method of detecting dynamically the adhesion conditions underneath a rail vehicle using modest cost sensors and advanced model based monitoring of the creep forces. The estimated creep forces are then post processed to give an estimation of the current adhesion condition.

/pdf/use-of-real-time-creep-force-estimation-data-for-assessment-n4djqgon26.pdf

Use of real time creep force estimation data for assessment of low adhesion in the wheel/rail contact

SUMMARY This paper reviews the measurements which are necessary to all aspects of vehicle dynamics as applied to rail vehicles. Although an attempt has been made to introduce some reference to measurements made in Europe and America, the detailed discussion has been limited to those techniques employed by British Rail. This has the advantage that the discussion can be first hand and therefore more specific. For convenience the measurements have been collected together under four broad headings. 1. Measurements of rail system data. 2. Measurements of vehicle parameters. 3. Measurements to validate theory and predictions. 4. Measurements of vehicle performance.

T. G. Pearce

Papers

The Use of Measured Force - Creepage Relationships in Vehicle Response Calculations