The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
An inertial measurement unit (IMU) comprising three accelerometers and three gyroscopes all of good quality, attached to the bogie of an in-service railway vehicle and suitably processed in conjunction with a tachometer signal and a GPS feed, tracks the location, orientation and trajectory of the bogie. Using this data, the condition of the track geometry can be assessed. By monitoring this data as...
There has been an increase in the use of `train monitoring train' and `infrastructure monitoring infrastructure' RCM systems over the last 5 years; which have demonstrated significant benefits. It can be more efficient to monitor some aspects of train condition from the line-side and to monitor some aspects of the condition of the infrastructure from passing trains. The use of these `cross-industry'...
The article deals with measurements carried out in three trial sections of railway lines in the Czech Republic, where different types of geocomposites were inserted under ballast during the period of 2008 to 2012. In these sections, the longterm monitoring of the durability of geometric characteristics of the track, as well as the degradation of embedded geosynthetic products and the homogeneity of...
Alstom is a worldwide leader in rail equipment and services with experience of implementing and using Remote Condition Monitoring systems. Within the UK, this has notably included supporting maintenance activities on the West Coast Main Line fleet since 2005. Alstom's TrainTracer tool is used on fleets worldwide, and we also implement retrofit of Remote Monitoring Systems to fleets, with references...
In this paper an experimental work regarding power quality in existing dc traction systems is presented and evaluated. The measurements were performed in two substations of the Athens-Piraeus Electric Railways (ISAP), according to the European standard EN 50160 and EN 61000, using 3 wire connection systems. The examined traction system use 600V DC. The main supply systems usually consist of a medium...
Following a review of maintenance costs a major US rail operator identified the need to change the way in which their diesel locomotive fleet was overhauled. This would involve the introduction of new maintenance techniques and detection technology as such a budget of approximately $3.4m was allocated to the improvement works. A rigorous selection process was followed to introduce a worldwide rail...
National Railway Administrations in Northern Europe do not employ systematic procedures in monitoring the current state of vegetation to form the basis of maintenance decision making. Current day vegetation maintenance is largely based on human visual estimates. This paper investigates a machine vision (MV) approach to be able to automatically quantify the amount of vegetation on a given railway section...
Condition monitoring is widely accepted across the rail industry in many different guises and varying degrees of success. So do we really make the best of Condition Monitoring, from basic rudimentary measurements through to more advanced state of the art? This paper aims to break down the barriers of condition monitoring, delving into research both inside and outside the rail industry and proposes...
Condition monitoring and maintenance of bearings for inservice machinery is a priority for railway operators. Degraded bearings can lead to inefficient operation, failures and their associated downtime. Vibration and acoustic emission analysis are well-known techniques for condition monitoring of rolling elements. However, these techniques usually require each bearing to be fitted directly with condition...
Collation and statistical analysis of oil analysis component alarms and fault types can give a better understanding of commonalities. Identification of a common issue allows the problems to be addressed by focussing resources and identifying the root cause.
Condition Monitoring is an useful technique employed in railways because it is possible to study any condition of the machinery in remote locations. In this paper, a fault tree analysis (FTA) is presented as a qualitative method for studying the state of the critical components of the railway infrastructure as a system considering to its different subsystems. The quantitative analysis of the FTA is...
This paper describes the development of a comprehensive multibody model of the twin disk test rig using the modular approach. The mathematical models for electrical and mechanical components and wheel and rail rollers are implemented using SimPowerSystems, SimDriveline and Simulink toolboxes. The static and dynamic responses of the rollers are measured with load cells and strain gauges. The experimental...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.