Metro de Madrid

Madrid, Spain

Metro de Madrid

Madrid, Spain
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Gonzalez J.,Metro de Madrid | Ranz D.,Sistemas y Procesos Avanzados | Marquez J.A.,Metro de Madrid | Miravete A.,University of Zaragoza
Materiales de Construccion | Year: 2010

Infrastructure and rail sectors share two singularities in terms of materials: highly structural performance and strict fire requirements. Moreover, there is a common growing interest in both sectors: the use of organic matrix composite materials due to their high performance, lightweight and in-service behavior. Traditionally, fire fillers have been added to the matrix, decreasing its mechanical performance in a critical way. A study about composite materials formed by three different matrices and four different carbon fibers will be presented in this paper. A number of laminates have been manufactured by using these composite materials in order to analyze both the resin processing and the compatibility of the different matrices and fibers. This study is a need due to the fact that these matrices are fire-related and therefore further problems may arise in comparison with standard matrices.

Zhang L.,Technical University of Madrid | Fernandez J.R.,Technical University of Madrid | Rodriguez C.B.,Technical University of Madrid | Rodriguez C.,Metro de Madrid | And 2 more authors.
2015 9th European Conference on Antennas and Propagation, EuCAP 2015 | Year: 2015

Broadband radio communication systems are very important for railway traffic control systems and passengers network services. Nowadays, even though 4G LTE (Long Term Evolution) has deployed for commercial use with excellent results in open areas, it is still lack of knowledge regarding to how such broadband signals propagate inside complex environments with many complex structures that affect propagation such as subway tunnels and stations. For this reason, the aim of the presented measurements in this paper is to model the response of the broadband channel at 1000 MHz and 2450 MHz in the subway environments. These measurements focus on three types of scenarios: subway stations, straight tunnels and a train effect the signal. The results provide detailed information about the propagation channel, which can be useful to develop a broadband propagation model for underground communication systems. © 2015 EurAAP.

Zhang L.,Technical University of Madrid | Briso C.,Technical University of Madrid | Fernandez J.R.O.,Technical University of Madrid | Alonso J.I.,Technical University of Madrid | And 3 more authors.
IEEE Antennas and Wireless Propagation Letters | Year: 2016

This letter presents an extensive campaign of wideband propagation measurements conducted in a modern subway environment in Madrid, Spain, at 980 and 2450 MHz. Measurements have been made using a channel sounder in a realistic environment of tunnel and station. Based on the measurement results, the principal parameters, such as mean power and delay spread, have been extracted for wideband propagation modeling. Furthermore, the results have been used to model electromagnetic reverberation, quality factor, and transition region between tunnel and station. The quantitative results provide a detailed wideband model of subway environment, as well as determine the design tradeoffs inside real tunnels and stations, in terms of optimal frequency band, antenna position, and expected multipath. © 2015 IEEE.

Guan K.,Beijing Jiaotong University | Zhong Z.,Beijing Jiaotong University | Briso-Rodriguez C.,Technical University of Madrid | Rodriguez-Sanchez C.,Metro de Madrid | And 3 more authors.
Progress in Electromagnetics Research Symposium | Year: 2014

This paper presents a set of broadband channel measurements conducted in a real metro station in Madrid at 2.45 GHz and 1 GHz, respectively. The power delay profile (PDP) of broadband channels at these two frequencies are obtained. Based on the PDPs, two preliminary tapped delay line models are established. The measured results and corresponding models provide the first-hand information of broadband channel and, therefore, are useful to design and assess the next generation of broadband communication systems in the metro environment.

Gonzalez J.,Metro de Madrid | Rodriguez C.,Metro de Madrid | Blanquer J.,Metro de Madrid | Mera J.M.,Technical University of Madrid | And 2 more authors.
Journal of Advanced Transportation | Year: 2010

The signalling system affects the type of service that can be provided on any particular railway line. The aims set when it comes to designing these systems to operate a railway line are: to ensure safety of operation and to ensure flexible and efficient running. When building a line capacity optimisation algorithm, it must reach a compromise solution between two parameters: minimise the interval between trains and keep journey time as low as possible. This paper aims to describe the algorithm developed between METRO DE MADRID and CITEF (Railway Technology Research Centre of the Universidad Politécnica de Madrid - UPM) that allows the capacity of an underground line equipped with ATP Distance To Go systems to be studied and optimised. This algorithm facilitates the tasks of signalling design and optimisation. Copyright © 2010 John Wiley & Sons, Ltd.

Gormaz-Gonzalez J.,Metro de Madrid | Gonzalez-Fernandez F.J.,Technical University of Madrid | Rodriguez-Nieto J.,Centro Tecnologico CARTIF | Saludes-Rodil S.,Centro Tecnologico CARTIF
Dyna (Spain) | Year: 2012

Nowadays, industry faces the optimisation of all the processes that concerns its activities: costs, quality, timing, production, etc. In this way, maintenance in transportation system, including underground passengers transport, deals with the same requirements. So, maintenance management strategies can be optimised both from technical and economical point of view. In this paper a system for optimising maintenance planning in underground metropolitan transport vehicles is presented. The system is based on failure prediction that uses failure data filed along time. Two different prediction approaches are used. The first one is based on the probability density function estimation associated to the time and mileage between failures. The second one considers the time and mileage between failures as a time series and forecasts values using a Support Vector Machine. The predictions obtained are compared against maintenance planning, which is designed according to coach manufacturer, operator experience and applicable regulations. Depending on the comparison result, the system can propose to modify the maintenance planning in three possible ways: to create new maintenance operations, to delete some of them and to change planned date or mileage of selected maintenance tasks. Preliminary results are shown.

Suarez B.,Technical University of Madrid | Rodriguez P.,Technical University of Madrid | Vazquez M.,Metro de Madrid | Fernandez I.,Metro de Madrid
Vehicle System Dynamics | Year: 2012

Vehicle-track interaction for a new resilient slab track designed to reduce noise and vibration levels was analysed, in order to assess the derailment risk on a curved track when encountering a broken rail. Sensitivity of the rail support spacing of the relative position of the rail breakage between two adjacent rail supports and of running speed were analysed for two different elasticities of the rail fastening system. In none of the cases analysed was observed an appreciable difference between either of the elastic systems. As was expected, the most unfavourable situations were those with greater rail support spacing and those with greater distance from the breakage to the nearest rail support, although in none of the simulations performed did a derailment occur when running over the broken rail. When varying the running speed, the most favourable condition was obtained for an intermediate speed, due to the superposition of two antagonistic effects. © 2012 Taylor & Francis.

Lei Z.,Technical University of Madrid | Suarez-Casal P.,University of La Coruña | Fernandez J.R.,Technical University of Madrid | Rodriguez-Pineiro J.,University of La Coruña | And 7 more authors.
2016 10th European Conference on Antennas and Propagation, EuCAP 2016 | Year: 2016

In this work, an evaluation of the fourth generation (4G) waveform performance in underground tunnel scenarios has been carried out with the help of hardware testbeds. The equipment for the measurements has been deployed inside the carriage of an underground train, and the antenna elements were located both outside and inside the carriage. The experiments consisted of narrowband and wideband propagation measurements, and over-the-air transmissions for physical layer performance assessment. © 2016 European Association of Antennas and Propagation.

Dominguez M.,Comillas Pontifical University | Fernandez A.,Comillas Pontifical University | Cucala A.P.,Comillas Pontifical University | Blanquer J.,Metro de Madrid
WIT Transactions on the Built Environment | Year: 2010

Energy usage in electrical railway systems is being studied in order to find technologies and developments for increasing energy efficiency. It is not only an environmental problem, but also concerns railway infrastructures as an economical aspect. The problem is finding which system to invest in for decreasing energy consumption and costs. In this paper, two possibilities are studied. The first one is the redesign of the ATO (Automatic Train Operation) speed profiles of metro lines. The speed commands in service nowadays were selected based on time and comfort criteria. In addition, in this paper the consideration of energetic criteria is taken into account. Complementing the previous possibility, the implementation of an on board energy storage device is evaluated. The regenerated energy of electrical brakes in metropolitan railways is not used if there is no other train starting up at the same time, and it is wasted with heating resistors. With the aim of taking advantage of regenerative energy, the economical and energetic advantages of investing in an on board storage device, despite its additional mass, are studied. Both approaches are finally jointed, obtaining speed profiles that are even more efficient with the implementation of the device. Optimal Pareto curves, where the best solutions are placed, are modified taking into account on board storage devices. A simulator is needed for the proper simulation of all the possible speed commands. It has been developed and validated with measurements in line 10 of the Madrid Underground. Solutions show that about 25% of energy savings are expected with only the speed profiles redesign. In addition, it is shown how these optimal speed profiles are modified when an on board energy storage device is also taken into account. © 2010 WIT Press.

De Matias Jimenez I.P.,Metro de Madrid
Revista de Obras Publicas | Year: 2010

Accessibility is one of the key subjects in the consecution of a sustainable public transport. Therefore, urban rail transport organizations have to undertake the challenge of transforming their networks towards universal accessibility. In this article, a methodology to characterize the accessibility of any rail station is developed. This methodology has been applied to Metro de Madrid network; results are presented.

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