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Recent Reliability Centered Maintenance (RCM) process has been increasingly applied for modern rolling stock applications to ensure the optimum maintenance of trains in its operating context. While significant benefits and tools at the appropriate stage in a new project can be achieved by applying the RCM methods, the general modeling and design framework for the RCM system implementation have to...
The problem of rolling stock maintenance is critical for the railroad transport in a general way, facing the difficulties over the component’s supply in addition to recovering criterions, long order lead times, flexible demand, position of workshops and fleet diversity. The output of this scenario appears in the figure of unplanned equipment downtime greatly affecting the earnings.
Emerging image analytics-based systems are increasingly becoming recognised as being an integral component of strategies for improving security standards in the rail sector, with great potential to address current and future concerns such as passenger safety and security, the prevention of crime and vandalism, anti-terrorism and crisis management. Other prospective benefits include enhanced travelling...
This paper proposes a train movement model with fixed runtime that can be employed to find feasible control strategies for a single train along an inter-city railway line. The objective of the model is to minimize arrival delays at each station along railway lines. However, train movement is a typical nonlinear problem for complex running environments and different requirements. A heuristic algorithm...
Flow around an ICE2 high-speed train exiting a tunnel under the influence of a wind gust has been studied using numerical technique called detached eddy simulation. A wind gust boundary condition was derived to approximate previous experimental observations. The body of the train includes most important details including bogies, plugs, inter-car gaps and rotating wheels on the rail. The maximal yawing...
The proposed handoff decision algorithm with dynamic sampling distance is the extension of the conventional algorithm based on received signal strength (Abbr. RSS). The dynamic sampling distance is coincident with the velocity of MT in GSM-R moving along the trajectory of high speed railway. The proposed algorithm was evaluated under two simple cell deployments along the high speed railway trajectory-the...
After the opening of the Lantau and Airport Railway (LAR) in 1998, the dynamic performance of the Overhead Conductor System (OCS) was considered needing improvement. There were scintillation, broken droppers and excessive worn-out of contact wire and high consumption of pantograph collector strips. The maintainers had limited number of suitable measuring devices and analytical tools at their disposal...
In DC rail transit systems, the running rails are usually used as the return conductor for traction current. This arrangement mainly focuses on economic considerations, since it does not require the installation of an additional return conductor. Low resistance between the traction return rails and the ground allows a significant part of the return current to leak into the ground. This is normally...
The application of Knowledge Based Asset Integrity in infrastructure and transport sectors is transforming the way that maintenance is planned and managed to bring about cost savings and improvements in performance where it matters. Users to date particularly value the improved management information and the increased availability of critical assets. This knowledge will continue to grow as more and...
The paper has outlined the approach adopted by Transport for London (TfL) for one of its largest rail projects to manage the technical and organisational complexity involved in delivering an operational and maintainable railway for London. The East London Line Project (ELLP) is now well into detailed design and construction stages and the tools and techniques of systems engineering have shown their...
The mechanical interface between vehicle-mounted shoegear and the third rail is critically important to the smooth running of electrically powered railway vehicles. An investigation is being undertaken into the static and dynamic interactions between shoegear and the third rail. This is being done by instrumenting the shoegear of a class 375 railway vehicle in the UK.
The need for improvement in safety and reliability will continue to be the most important issues of the railway industry. This could be achieved through advances in on-board computers, on-board train condition monitoring systems, and wireless data transmission from wayside monitoring systems back to the central computer. There is also an increasing demand for better system reliability, availability,...
This paper is to present the reviewing results on the design and implementation of energy efficient technologies and their future development and applications of the vertical transportation system -escalator in the railway industry. Two alternative methods [1] are introduced to reduce energy consumption of escalator in the railway industry. The first one called “VSD” method, by installation of a variable...
The re-scheduling of trains in response to a disruptive incident is an important, yet complicated task, and there is a very strong need for the development of on-line decision support systems for the task. However, the optimisation of train re-scheduling, which is necessary for devising such a system, is computationally very hard. It is therefore important to develop a model on which optimisation...
This paper presents a generic approach for fault detection and diagnosis for a class of railway assets with common dynamic characteristics known as Single Throw Mechanical Equipment (STME) [1]. STMEs are widely used in railway systems, examples of which include point machines, train-stops (also known as trip-cocks), train doors and level crossing barriers. These assets are used as case studies in...
Electrified railway systems are widely used for urban transportation around the world. In most DC electrified transit systems the running rails are used as the return conductor for traction current. Due to the resistances of running rails and rail-to-ground in totally floating earth systems, there will be a potential rise between the running rails and the ground known as the touch voltage which is...
One of the success factors of the world class MTR system in Hong Kong is the provision of a seamless and good quality pedestrian link network between railway stations and nearby developments. The pedestrian link (abbreviated as “PedLink”), in the form of station entrance, pedestrian subway or footbridge, not only enhances the accessibility of railway stations but also brings significant social, economic...
The industry best practice guideline PAS 55-1 advocates risk based asset management to be a key success factor for asset-heavy systems. Risk based approach does not mean taking on more risk, but use risk to balance cost, performance, safety, customer service, investment and social responsibilities. Within the MTR Corporation, asset management is a controllable factor of business through understanding...
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