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An innovative topology-based method for modeling railway train control systems is proposed in this paper. The method addresses the problems of having to rely too much on designers' experience and of incurring excessive cost of validation and verification in the development of railway train control systems. Four topics are discussed in the paper: 1) the(More)
The IPSE 2.5 project is concerned with the problem of how computer systems can be used in the development of information systems. The project is being carried out under the UK Alvey Programme Software Engineering Strategy by a consortium comprising STC Technology Limited, International Computers Limited, University of Manchester, Dowty Defense and Air(More)
Increasing attention is being paid to energy efficiency in subway systems to reduce operational cost and carbon emissions. Optimization of the driving strategy and efficient utilization of regenerative energy are two effective methods to reduce the energy consumption for electric subway systems. Based on a common scenario that an accelerating train can(More)
An energy-efficient train trajectory describing the motion of a single train can be used as an input to a driver guidance system or to an automatic train control system. The solution for the best trajectory is subject to certain operational, geographic, and physical constraints. There are two types of strategies commonly applied to obtain the(More)
—Improved fuel consumption and lower emissions are two of the key objectives for future transportation. Hybrid Electric Vehicles (HEVs), in which two or more power systems are combined, are able to meet these objectives through the capture and reuse of regenerated braking energy, and through optimised use of the prime mover. However, more complicated power(More)
Regenerative braking improves the energy efficiency of railway transportation by converting kinetic energy into electric energy. This paper proposes a method to apply the Bellman-Ford (BF) algorithm to search for the train braking speed trajectory to increase the total regenerative braking energy (RBE) in a blended braking mode with both electric and(More)