Academic literature on the topic 'Maglev rail system'
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Journal articles on the topic "Maglev rail system"
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Wang, Dangxiong, Xiaozhen Li, Lin Liang, and Xiaowei Qiu. "Influence of the track structure on the vertical dynamic interaction analysis of the low-to-medium-speed maglev train-bridge system." Advances in Structural Engineering 22, no. 14 (June 11, 2019): 2937–50. http://dx.doi.org/10.1177/1369433219854550.
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The low-to-medium-speed maglev train is stably suspended near the rated suspension gap. The suspension force acts directly on the track and is transmitted to the bridge. The maglev track structure is novel, and the influence mechanism of the track structure on the coupled vibration of the maglev train-bridge system is unknown. Therefore, in this study, we propose vertical dynamic interaction models of the low-to-medium-speed maglev train-bridge system and the low-to-medium-speed maglev train-track-bridge system to analyse the influence mechanism of the maglev track structure on the vertical dynamic interaction of the low-to-medium-speed maglev train-bridge system. The vibration characteristics of the F-rail and the influence mechanism of the track structure on the dynamic responses of the bridge are discussed in detail. The study verifies that the local deformation of the F-rail is self-evident and cannot be ignored. In addition, the influence of the F-rail on the dynamic interaction of the maglev train-bridge system is mainly reflected in two aspects: first, the vibration of the bridge in the high-frequency band increases due to the high frequency and intensive local vibration of the F-rail itself. Second, the vibrations of the bridge and the F-rail in the low-frequency band increase due to the periodic irregularities caused by the local deformation of the F-rail. In this study, we consider the vertical dynamic interaction model of the low-to-medium-speed maglev train-track-bridge system.
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Yang, Ying, Wenyue Zhang, Laisheng Tong, Qibiao Peng, Huajun Luo, and Jianguo Suo. "Analysis and solution of eddy current induced in rail for medium and low speed maglev transportation system." Transportation Systems and Technology 4, no. 4 (December 19, 2018): 129–37. http://dx.doi.org/10.17816/transsyst201844129-137.
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Background: For medium and low speed maglev transportation system, the eddy current will be induced in rail, which is made of solid steel, while the train is running. The levitation force of electromagnets will be weakened by the magnetic field generated by eddy current in the rail, especially at the position of the forefront electromagnets. With the increase of train running speed, the eddy current effect will also increase, which will reach 30 % at 100 km/h, and which will directly affect the levitation stability of the train during high-speed running. Put it another way, it will limit the further improvement of the running speed of the medium and low speed maglev train.
Aim: In order to solve the above problem, and compensate the levitation force reduced by the eddy current effect.
Methods: The FEA method is used to obtain the magnetic field distribution and levitation force changing with the train speed. And taking the middle and low speed maglev trains and rails of Changsha Maglev Express as the research object, we have adopted two solutions, and the prototypes of airsprings and levitation magnets are manufactured and tested in the train.
Results: The test result show that the currents of the windings at the front end of the two forefront electromagnets are reduced obviously.
Conclusion: In this paper, the medium and low speed maglev train and rail used by Changsha Maglev Express are studied, the eddy current effect is analyzed, and two solutions are proposed. The results show that the solution methods can alleviate the eddy current effects to some extent.
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Ahmed, Raheel, Yu Li Jun, Muhammad Fawad Azhar, and Naveed Ur Rehman Junejo. "Comprehensive Study and Review on Maglev Train System." Applied Mechanics and Materials 615 (August 2014): 347–51. http://dx.doi.org/10.4028/www.scientific.net/amm.615.347.
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Electromagnetic levitated systems commonly used in the field of people transportation, tool machines frictionless bearings and conveyor systems. In the case of high speed people transport vehicles, the electromagnetic levitation offers the advantage of a very silent motion and of a reduced maintenance of the rail. Magnetic levitated trains requires the guidance force needed to keep the vehicles on the track is obtained with the levitation electromagnets, Particular shapes of the rails and to a clever placement of the electromagnets with respect to the rails helpful and effective to achieve the goal. This article gives the basic idea of the electromagnets trains and its control system mechanism
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Zhang, Lei, Bo Zhang, Lin Ba, and Hang Gao. "The Centerline Position Measuring and Online Machining Compensation of the Rail Base for High-Speed MAGLEV." Materials Science Forum 532-533 (December 2006): 592–95. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.592.
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The precision machining of the rail base for high-speed Magnetically Levitated Trains (MAGLEV) is the precondition for laying the high-quality whole rail and accomplishing the integrative performance test of the train. A new method is advanced to improving the machining precision in this paper. The X and Y coordinates of the cross centers on the rail base for MAGLEV will be obtained through two raster displacement sensors which are perpendicular to each other. So the machining datum position of the rail will be determined. According to the spatial position relationship between the straight movement error of the guideway on the numerical control machine tools and the central line of the rail base for MAGLEV, error compensation will be made to improve the machining precision in the process of the numerical control machining. The mechanism design theory of the measuring system is presented in this paper. On basis of both the design theory and the software platform of LabWindows/CVI, the virtual measurement system for measuring straight movement error of the rail on the numerical control machine tool, which is used to machining the rail base for MAGLEV will be established.
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Neto, João Batista Pinto, Lucas de Carvalho Gomes, Miguel Elias Mitre Campista, and Luís Henrique Maciel Kosmalski Costa. "An Accurate GNSS-Based Redundant Safe Braking System for Urban Elevated Rail Maglev Trains." Information 11, no. 11 (November 15, 2020): 531. http://dx.doi.org/10.3390/info11110531.
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The association of elevated rail structures and Maglev (magnetic levitation) trains is a promising alternative for urban transportation. Besides being cost-effective in comparison with underground solutions, the Maglev technology is a clean and low-noise mass transportation. In this paper, we propose a low-cost automatic braking system for Maglev trains. There is a myriad of sensors and positioning techniques used to improve the accuracy, precision and stability of train navigation systems, but most of them result in high implementation costs. In this paper, we develop an affordable solution, called Redundant Autonomous Safe Braking System (RASBS), for the MagLev-Cobra train, a magnetic levitation vehicle developed at the Federal University of Rio de Janeiro (UFRJ), Brazil. The proposed braking system employs GNSS (Global Navigation Satellite System) receivers at the stations and trains, which are connected via an ad-hoc wireless network. The proposed system uses a cooperative error correction algorithm to achieve sub-meter distance precision. We experimentally evaluate the performance of RASBS in the MagLev prototype located at the campus of UFRJ, Brazil. Results show that, using RASBS, the train is able to dynamically set the precise location to start the braking procedure.
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Wolek, Arthur Lester. "Maglev freight - one possible path forward in the U.S.A." Transportation Systems and Technology 4, no. 3 (November 2, 2018): 117–33. http://dx.doi.org/10.17816/transsyst201843117-133.
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Background: As high-speed rail and other transportation technologies are moving forward and gaining funding in the United States, the push for MagLev is not receiving the necessary support that would make it a viable alternative in the near future. Major changes in the approach to implementing MagLev could make a better case for it, specifically for carrying freight. One alternative that has been considered in the past is the modification of existing freight railways to support MagLev. For this to be economically feasible and practical, such a solution has to be able to support both conventional freight trains and MagLev freight.
Aim: The successful application of Partially Magnetically-Levitated Freight (PMLF) technology achieved by integrating superconducting MagLev technology with current railroad design and operations.
Methods: A MagLev freight system that is envisioned to use existing rail routes must be designed to be compatible with the existing railway infrastructure. To accomplish this, every component utilized by the railroads must be examined in detail to determine if and how it could be affected by the proposed PMLF. In addition, components that will need to be modified for PMLF operation must undergo a retrofit design and testing process. The design scope must also include an examination of all existing tasks and activities that are being performed by the railroads such as track maintenance and repair. Any procedures that affect or are affected by the addition of PMLF will need to be modified. Finally, superconducting MagLev technology must be optimized and advanced for application to PMLF.
Opinions and Discussions: The dual use of railway lines has substantial cost advantages when compared to building new dedicated MagLev freight corridors. In fact it could make the entire proposition very appealing if proven to be technically feasible. However, there are certain limitations and concerns that would cause policy makers to reject such a proposal unless such obstacles can be shown to be temporary and non-critical. Essential rail installations such as switches are presently difficult to modify in a way that would ensure reliable functionality for both MagLev and conventional freight trains, and grade crossings pose safety risks. It is difficult to envision the tremendous leap forward of merging MagLev with existing freight rail lines when much more basic technologies such as positive train control are not even fully implemented. Consequently, it is a challenge to advance MagLev in the United States where new dedicated freight corridors are considered to be cost-prohibitive and dual use railway lines pose uncertainties that railroad companies simply do not want to solve. However, there is one more solution has not been considered that would allow a MagLev freight train to navigate on existing railway infrastructure without disrupting traditional rail utilization. This solution is a partially magnetically-levitated freight train.
Results: After reviewing the fundamental components, systems and operations of the railways in the United States, it will be feasible and practical to introduce magnetic levitation technology to assist in moving freight on existing rail routes. PMLF trains will be able to take advantage of magnetic levitation on sections where the track has been upgraded to allow its use and much higher speed while still being able to travel on unmodified sections with the same speed as traditional trains.
Conclusion: Modifying existing freight rail with magnetic “quasi-lift” technology is a much lower cost alternative to building an entirely new MagLev infrastructure. This alternative will provide very important benefits including enhancing safety in the rail industry. In its first phase of implementation, the proposed PMLF system will levitate a significant portion of the weight of the train but still utilize the existing steel rails for traction and guidance. The most evident advantages of this approach include reduced wear on rail and other supporting elements, and a significant reduction in friction and energy use. Locomotives, freight cars and all other components could be made lighter and travel speeds will increase dramatically due to less impact and other effects. Later phases of implementation will focus on magnetic traction and guidance. The acceptance and success of this partially levitated system will eventually lead to fully levitated freight transport technology. Sometimes it is necessary to take smaller steps to achieve the desired future.
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Chen, Gui Rong, Li Li Zheng, and Dan Feng Zhou. "Study on the Characteristics of the Maglev Electromagnet Considering the Magnetic Field Induced by Eddy Current." Applied Mechanics and Materials 392 (September 2013): 413–19. http://dx.doi.org/10.4028/www.scientific.net/amm.392.413.
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The rails of the medium-low speed maglev system are entirely manufactured by roller milling, and eddy current in the rail can be induced when relative movement between the electromagnet and the rail manifests. The eddy current reduces the magnetic field in the air gap between the electromagnet and the rail, which, as a result, decreases the levitation force; and higher speed will cause more levitation force lost. Moreover, the eddy current produces a drag force which is opposite to the propulsion force generated by the linear inductive motor. In this paper, based on the electromagnetism, the formulae for the levitation force and the drag force of the electromagnet are deduced when the eddy current in the rail is taken account. Simulations based on the model of the maglev vehicle on the Tangshan maglev test line are also performed. The results indicates that the levitation force is significantly affected by the eddy current in the rail, and when v = 200 km/h, the levitation force of a single electromagnet is reduced by 35.6%; meanwhile, the drag force increases dramatically as the speed increases, but when the speed exceeds 100 km/h, the drag force stops increasing, and it equals 2.28% of the stationary levitation force.
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Yan, Peiliang. "Progress made and prospect of China's maglev transportation technology standardization." Transportation Systems and Technology 4, no. 3 suppl. 1 (November 19, 2018): 246–52. http://dx.doi.org/10.17816/transsyst201843s1246-252.
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Background: In order to standardize maglev transportation engineering and its operation, the research of maglev transportation technical standards becomes important. Based on the analysis of the growth of rail transit, the acceleration of maglev transportation engineering, the China’s standardization regulation and the maglev transportation technology standardization practice,
Aim: This paper proposes the basic principles for establishing maglev transportation standard system and the framework of maglev transportation technical standard system, introducing China’s maglev transportation technology standardization mechanism, its achievements, prospects and experiences.
Results: By the end of 2017, China had developed 12 maglev transportation technical industry and provincial standards.
Conclusion: There are 12 maglev transportation technical industry standards and social organization standards under development.
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Wenk, Matthias, Johannes Kluehspies, Larry Blow, Eckert Fritz, Martina Hekler, Roland Kircher, and Michael H. Witt. "Practical investigation of future perspectives and limitations of maglev technologies." Transportation Systems and Technology 4, no. 3 suppl. 1 (November 19, 2018): 85–104. http://dx.doi.org/10.17816/transsyst201843s185-104.
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Results of an International Survey among Transport Experts and Specialists Maglev.
With the aim of tracking current trends in the market perspectives of magnetic levitation, or maglev technologies, the non-profit International Maglev Board conducted a primary study in the spring of 2018 among maglev specialists and transportation professionals. More than 1 000 professionals took part in the survey. Main topics of the study are questions comparing the suitability of conventional wheel-on-rail and maglev technologies according to application areas. Predicted opportunities and developments in maglev technology, acceptance issues and research needs are analyzed. The results are broken down by expertise and nationality of the participants. This short version presents selected findings of the survey in compressed form.
Background: There is an obvious need for information on international trends in the application of Maglev transport technologies. The study attempts to grasp the global dimension of magnetic levitation developments in a structured way.
Aim: To track current trends in magnetic levitation transport system innovation. Identify perspectives, research tasks and implementation barriers. Comparison of magnetic levitation systems with steel wheel systems. Analysis of the key topics of the debate.
Methods: Primary study in spring 2018 among 1 058 maglev specialists and transport experts. Internet-based online survey.
Results: The ratings vary greatly according to the expertise and origin of the respondents. In certain fields of application, wheel-rail systems remain the preferred transport technology. But in certain other fields of application, maglev technologies have become preferred over conventional steel-wheel-rail by a majority of transport professionals. This is particularly the case for high-speed maglev transport and for the new application of maglev elevators in buildings. At the same time, many respondents see a continuing need for research.
Conclusion: Overall, there is a differentiated picture. Respondents from North and South America, Russia and Asia are on average particularly open to an implementation of certain maglev technologies.
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Park, Chan Bae, Byung Song Lee, Jae Hee Kim, Jun Ho Lee, and Hyung Woo Lee. "A Study on the Structure of Linear Synchronous Motor for 600km/h Very High Speed Train." Applied Mechanics and Materials 416-417 (September 2013): 317–21. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.317.
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Recently, an interest in a hybrid system combining only the merits of the conventional wheel-rail system and Maglev propulsion system is growing as an alternative to high-speed maglev train. This hybrid-type system is based on wheel-rail method, but it enables to overcome the speed limitation by adhesion because it is operated by a non-contact method using a linear motor as a propulsion system and reduce the overall construction costs by its compatibility with the conventional railway systems. Therefore, a comparative analysis on electromagnetic characteristics according to the structural combinations on the stator-mover of Linear Synchronous Motor (LSM) for Very High Speed Train (VHST) maintaining the conventional wheel-rail method is conducted, and the structure of coreless superconducting LSM suitable for 600 km/h VHST is finally proposed in this paper.
Dissertations / Theses on the topic "Maglev rail system"
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Ziemke, Dominik. "Comparison of high-speed rail systems for the United States." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37286.
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After decades of standstill in intercity passenger rail in the United States, the Obama administration recently started major initiatives to implement high-speed ground transportation projects that are expected to improve the nation's transportation system significantly, addressing most prevailing issues like congestion and energy prices while having positive effects on the economy.
This study evaluates and compares two high-speed ground transportation systems that have the potential to improve intercity passenger transportation in the United States significantly: the wheel-on-rail high-speed system and the high-speed maglev system. Both high-speed ground transportation systems were evaluated with respect to 58 characteristics organized into 7 categories associated with technology, environmental impacts, economic considerations, user-friendliness, operations, political factors, and safety. Based on the performance of each system in each of the 58 characteristics, benefit values were assigned. In order to weight the relative importance of the different characteristics, a survey was conducted with transportation departments and transportation professionals. The survey produced weighting factors scoring each of the 58 characteristics and the 7 categories. Applying a multi-criteria decision making (MCDM) approach, the overall utility values for either system were calculated based on the benefit values from the systems comparison and the weighting factors from the survey.
It was shown that the high-speed maglev system is generally slightly superior over the wheel-on-rail high-speed system. Because the magnitude of the difference in the overall performance of both transportation systems is not very big, it is recommended that every project in the high-speed intercity passenger transportation market consider both HSGT systems equally.
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Beggio, Silvia. "Manutenzione preventiva della Rail Line tramite il metodo MAGEC." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016.
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L'elaborato è il risultato del progetto di tesi svolto presso l’azienda Lift Truck Equipment L.T.E. di Ostellato (Ferrara) che opera nell’ambito della progettazione e produzione di gruppi di sollevamento ed attrezzature per carrelli elevatori all’interno del gruppo Toyota Material Handling. Il progetto è stato svolto nel periodo da gennaio a marzo 2016 in collaborazione con l’ufficio di Ingegneria di processo di L.T.E. e riguarda l’applicazione del metodo MAGEC (Modi e Analisi dei Guasti e delle Criticità) per l’analisi dei guasti di una linea produttiva dell’azienda, la Rail Line.
Nel primo capitolo viene inquadrato il sistema produttivo dell’azienda in aderenza con la filosofia del TPS (Toyota Production System) per chiarire l’ambito in cui è nato il progetto, le motivazioni che hanno portato al suo sviluppo e l’ottica secondo cui è stato svolto.
Nel secondo capitolo è fornita una descrizione dell’approccio utilizzato, che consiste in una variante della FMECA, il metodo più utilizzato per le analisi in ambito affidabilistico. Inoltre sono riportate le attività di pianificazione che sono state svolte preliminarmente all’inizio del progetto.
Successivamente nel terzo capitolo sono illustrati in modo dettagliato i vari step dell’implementazione del metodo, dalla raccolta dati, effettuata presso l’azienda, all’elaborazione.
L’ultimo capitolo è dedicato ai risultati dell’analisi e a una breve descrizione di come tali risultati sono stati utilizzati nelle attività di manutenzione preventiva.
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Rojas, Gabriel active 2007. "Maglev high speed ground transportation for the Texas Triangle : a technology assessment." Thesis, 2007. http://hdl.handle.net/2152/22316.
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A maglev rail network connecting the Texas Triangle has the ability to unite this
emerging mega-region with a highly efficient alternative to auto and air transport. This would
serve to increase the economic sharing of resources and will improve the quality of life for
residents with enhanced accessibility to jobs and services in all triangle cities. Many
unforeseen benefits materialize from such a highly connected regional transportation
infrastructure including cost reductions in highway maintenance and construction and
reduced air traffic in congested skies and airports. This study examines the reasons for
choosing a maglev system, regulatory barriers to implementing such a system, and the costs
associated with a Maglev system built in the Texas Triangle.text
Books on the topic "Maglev rail system"
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Nassar, Fadi Emil. Operational and cost models for high-speed rail and maglev systems. 1993.
Find full textBook chapters on the topic "Maglev rail system"
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Huang, Xiao-yan, Jian-cheng Zhang, Chuan-ming Sun, Zhang-wen Huang, Qin-fen Lu, You-tong Fang, and Li Yao. "A Combined Simulation of High-Speed Train Permanent Magnet Traction System Using Dynamic Reluctance Mesh Model and Simulink." In China's High-Speed Rail Technology, 561–76. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5610-9_30.
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"Noise/Vibration and Electric and Magnetic Fields of High Speed Rail/Maglev Systems." In High Speed Rail in the US, 95–116. CRC Press, 1998. http://dx.doi.org/10.1201/9781482283228-11.
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Hanson, Carl E. "Noise/Vibration and Electric and Magnetic Fields of High Speed Rail/Maglev Systems." In High Speed Rail in the U.S. Super Trains for the Millennium, 79–99. CRC Press, 2020. http://dx.doi.org/10.1201/9781003078326-4.
Full textConference papers on the topic "Maglev rail system"
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Barbosa, Fábio C. "High Speed Intercity and Urban Passenger Transport Maglev Train Technology Review: A Technical and Operational Assessment." In 2019 Joint Rail Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/jrc2019-1227.
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Magnetic levitation (maglev) is a highly advanced technology which provides, through magnetic forces, contactless movement with no wear and friction and, hence, improved efficiency, followed by reduced operational costs. It can be used in many fields, from wind turbines to nuclear energy and elevators, among others. Maglev trains, which use magnetic levitation, guidance and propulsion systems, with no wheels, axles and transmission, are one of the most important application of the maglev concept, and represents the first fundamental innovation of rail technology since the launch of the railroad era. Due to its functional features, which replaces mechanical components by a wear free concept, maglev is able to overcome some of the technical restrictions of steel-wheel on rail (SWR) technology, running smoother and somewhat quieter than wheeled systems, with the potential for higher speeds, acceleration & braking rates and unaffected by weather, which ultimately makes it attractive for both high speed intercity and low speed urban transport applications. From a technical perspective, maglev transport might rely on basically 3 technological concepts: i) electromanetic suspension (EMS), based on the attraction effect of electromagnets on the vehicle body, that are attracted to the iron reactive rails (with small gaps and an unstable process that requires a refined control system); ii) Electrodynamic Levitation (EDL), which levitates the train with repulsive forces generated from the induced currents, resulted from the temporal variation of a magnetic field in the conductive guide ways and iii) Superconducting Levitation (SML), based on the so called Meissner Effect of superconductor materials. Each of these technologies present distinct maturity and specific technical features, in terms of complexity, performance and costs, and the one that best fits will depend on the required operational features of a maglev system (mainly speed). A short distance maglev shuttle first operated commercially for 11 years (1984 to 1995) connecting Birmingham (UK) airport to the the city train station. Then, high-speed full size prototype maglev systems have been demonstrated in Japan (EDL) (552 kph - 343 mph), and Germany (EMS) (450 kph - 280 mph). In 2004, China has launched a commercial high speed service (based on the German EMS technology), connecting the Pudong International Airport to the outskirts of the city of Shanghai. Japan has launched a low speed (up to 100 kph - 62.5 mph) commercial urban EMS maglev service (LIMINO, in 2005), followed by Korea (Incheon, in 2016) and China (Changsha, in 2016). Moreover, Japan is working on the high speed Maglev concept, with the so called Chuo Shinkansen Project, to connect Tokio to Nagoya, in 2027, with top speeds of 500 kph (310 mph). China is also working on a high speed maglev concept (600 kph - 375 mph), supported on EMS Maglev technology. Urban Maglev concept seeks to link large cities, with their satellite towns and suburbs, to downtown areas, as a substitute for subways, due to its low cost potential, compared to metros and light rail (basically due to their lower turning radius, grade ability and energy efficiency). High Speed Maglev is also seen as a promising technology, with the potential do provide high quality passenger transport service between cities in the 240–1,000 km (150–625 mi) distance range into a sustainable and reliable way. This work is supposed to present, based on a compilation of a multitude of accredited and acknowledged technical sources, a review of the maglev transport technology, emphasizing its potential and risks of the low and high speed (urban and intercity) market, followed by a brief summary of some case studies.
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Wang, Keren, Shihui Luo, Jiye Zhang, and Weihua Ma. "Maglev System Control Algorithm and the Related Dynamic Analysis." In First International Conference on Rail Transportation 2017. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481257.069.
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Gurol, Sam, and Bob Baldi. "Overview of the General Atomics Urban Maglev Technology Development Program." In ASME/IEEE 2004 Joint Rail Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/rtd2004-66031.
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General Atomics is developing Urban Maglev technology sponsored by the Federal Transit Administration and funded under the Transportation Equity Act for the 21st Century (TEA-21). The system is levitated, propelled, and guided by electromagnetic forces. Levitation is achieved by using simple, passive permanent magnets arranged in a “Halbach” array configuration. Propulsion, and guidance are achieved by a linear synchronous motor mounted on the track. The uniqueness of the approach is its simplicity, ruggedness, and performance, including 10% grade, 18.3 m (60 ft.) turn radius, one-inch levitation gap, and quiet operation. Use of elevated guideways, coupled with the quiet operation of the system, eliminates the need to tunnel underground for noise-abatement, and can result in significantly lower system costs. We have built full-scale hardware to demonstrate the levitation, propulsion, guidance, and location detection systems. We are currently building a 120 m (400 ft.) test track with a full-scale chassis and power system at General Atomics in San Diego, CA. The chassis and power systems have already been built and are under-going initial testing. The track will be completed for dynamic testing in 2004. This paper reports on the overall program progress to date and description of the planned testing.
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Thornton, Richard D., Tracy Clark, and Brian Perreault. "Linear Synchronous Motor Propulsion of Small Transit Vehicles." In ASME/IEEE 2004 Joint Rail Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/rtd2004-66020.
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The Linear Synchronous Motor (LSM) has been used for several high speed maglev applications but only recently have developers applied it to urban transit. MagneMotion has worked with the Federal Transit Administration (FTA), as part of their Urban Maglev Project, to develop an LSM propelled maglev transit system called M3. The top speed is only half that of the Transrapid maglev trains now operational in China but by using small vehicles with short headway and rapid acceleration it is possible to achieve outstanding performance at much lower cost. The combination of LSM technology and small vehicles is a cost effective replacement for rotary motor and Linear Induction Motor (LIM) powered trains for all transit applications, including conventional rail and monorail. LSM is the enabling technology that makes it economically and technically feasible to achieve high capacity with short vehicles and, conversely, the use of small vehicles makes LSM propulsion economically attractive. Small vehicles operating with short headway and organized in clusters can achieve high capacity without offline loading. Very precise position sensing and guideway based propulsion and control make short headways safe and affordable. This paper describes the objectives of the MagneMotion LSM development, discusses some of the design features, and presents 3 examples. The examples are based on operational speeds up to 60 m/s (134 mph), accelerations up to 0.16 g, vehicle headways down to 4 seconds, and capacities up to 12,000 passengers per hour per direction (pphpd). Examples include a 1 mile high capacity shuttle, a 4 km unidirectional loop with several stations, and a 30 km high-speed airport connector. Calculations show that an LSM propelled transit system has lower capital cost than conventional transit systems using vehicle-based electric propulsion with either rotary motors or LIMs. Vehicles are simplified, the cost of energy and maintenance is reduced and, most important, users of the transit system experience major reductions in trip times.
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Wai, Rong-jong, and Jeng-dao Lee. "Development of Levitation Control for Linear Maglev Rail System via Backstepping Design Technique." In 2006 IEEE Conference on Robotics, Automation and Mechatronics. IEEE, 2006. http://dx.doi.org/10.1109/ramech.2006.252611.
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Aly, Mohamed, and Thomas Alberts. "De-Centralized and Centralized Control for EMS Maglev System Levitation and Guidance." In ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASMEDC, 2011. http://dx.doi.org/10.1115/dscc2011-6166.
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The comparison between PD de-centralized and centralized control for an EMS maglev system that uses combined magnets with an inverted U-rail for levitation and guidance is presented. A simple 2-DOF maglev system model (rigid and flexible body cases) that comprises heave and lateral modes is used. The comparison is based on two aspects. First, by sketching the multi-input multi-output (MIMO) root loci with every controller individually for system rigid and flexible body cases. Second, a gradient-like search algorithm based on an optimal criterion for PD de-centralized and centralized controllers’ gains tuning is used. Simulation results of the maglev system with these tuned controllers show that the centralized control scheme is capable of lateral displacements suppression that may result from disturbing lateral forces than the de-centralized one.
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Wai, Rong-Jong, and Jeng-Dao Lee. "Robust Fuzzy-Neural-Network Levitation Control Design for Linear Maglev Rail System with Nonnegative Inputs." In IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics. IEEE, 2006. http://dx.doi.org/10.1109/iecon.2006.347386.
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He, Xingtai, Guofeng Zeng, GuoQiang Wang, Feng Ye, and Yihong Yuan. "The Application of Structure Laser Detection System in Medium and Low Speed Maglev F-Rail Detection." In 19th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2019. http://dx.doi.org/10.1061/9780784482292.308.
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"Damage Identification of High-speed Maglev Guideway Girder Based on Modal Identification." In Structural Health Monitoring. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901311-34.
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Abstract. As a modern high-tech rail vehicle, the maglev train realizes the non-contact suspension and guidance between the train and the guideway, which greatly reduces the resistance of the system. Due to the high-speed operation characteristics of maglev trains, the structural health monitoring of guideway girders is particularly important for the safety and stability of maglev train operation. This paper takes the maglev train guideway girder as the monitoring target, and the finite element model of the maglev vehicle-guideway is established to simulate the running state of the train passing through the guideway girder. The dynamic response data of the guideway girder is obtained in the finite element model, considering healthy states and different damage states of the guideway girder. Then, a modal-based damage identification method is proposed, which obtains the guideway girder damage sensitive characteristics by decomposing the guideway girder acceleration response signal. Finally, based on the measured guideway girder acceleration data, this paper verifies the effectiveness of the damage identification method in guideway girder structure health monitoring, which provides reference and guidance for the future maintenance of the maglev guideway girder.
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Lynch, Tim. "MagLev and High Speed Rail System Environmental Energy and Economic Benefit Evaluation in Florida: A Comparative Analysis." In Future Transportation Technology Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1990. http://dx.doi.org/10.4271/901477.
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