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ASME/IEEE Joint Conference on Railroads最新文献

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Introduction of static frequency converters on SEPTA's 25 Hz commuter rail system 在SEPTA的25赫兹通勤铁路系统上引入静态变频器
ASME/IEEE Joint Conference on Railroads Pub Date : 1990-04-17 DOI: 10.1109/RRCON.1990.171673
R. Fisher
{"title":"Introduction of static frequency converters on SEPTA's 25 Hz commuter rail system","authors":"R. Fisher","doi":"10.1109/RRCON.1990.171673","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171673","url":null,"abstract":"A Southeastern Pennsylvania Transportation Authority (SEPTA) project to replace its 1928-vintage rotary converters and one of its converter stations with static frequency converters (SFCs) is described. An examination is made of the development of this project, including the rationale for maintaining a 25 Hz traction power system. The specific emphasis is on the power factor control and harmonic distortion on the utility company's 60 Hz system. The negotiations with the utility company to connect the first SFC to the existing 13.2 kV service and to provide a 230 kV service for the addition of two more SFCs are also discussed.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114708169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Vehicle reactions versus track geometry 车辆反应与轨道几何
ASME/IEEE Joint Conference on Railroads Pub Date : 1990-04-17 DOI: 10.1109/RRCON.1990.171676
C. Esveld
{"title":"Vehicle reactions versus track geometry","authors":"C. Esveld","doi":"10.1109/RRCON.1990.171676","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171676","url":null,"abstract":"For assessment purposes the total range of relevant wavelengths for differential settlements is split up into a number of wavebands in accordance with vehicle response characteristics to deformations in the track geometry and the potential of maintenance machines to correct the track geometry. The measurement signals produced by recording cars are analyzed by calculating the standard deviation per waveband and detecting the exceedence of particular threshold levels. The major problem in analyzing and interpreting these signals is how the results of individual signals should be combined to one overall result. The best practical solution is to normalize the standard deviations and take the largest one as the decisive one. This is purely an empirical approach in which a theoretical basis is lacking. The one solution to combining the different geometrical components is via vehicle response. This approach is discussed.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127037350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
An automatic speed enforcement system for heavy freight trains 重型货运列车自动测速系统
ASME/IEEE Joint Conference on Railroads Pub Date : 1990-04-17 DOI: 10.1109/RRCON.1990.171658
G. Thelen, Y. H. Tse
{"title":"An automatic speed enforcement system for heavy freight trains","authors":"G. Thelen, Y. H. Tse","doi":"10.1109/RRCON.1990.171658","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171658","url":null,"abstract":"An automatic speed enforcement (ASES) system is described that was developed specifically for use on heavy general merchandise, unit, and intermodal trains. With this automatic system, a microprocessor generates a speed profile corresponding to a specific change of cab signal. The system monitors train speed and, following a downward change of cab signal, requires that train speed be gradually reduced as the train moves farther into the block. The engineer can use a minimal air brake application, throttle reduction, dynamic braking, or a combination of the three to comply with the speed limit safely. A penalty brake application is imposed when the speed profile is violated. The automatic train control system was overlaid onto an existing continuous cab signal system.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133114735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Validation of 'System 21' monobeam transit with computer analysis and large models 用计算机分析和大型模型验证“System 21”单梁传输
ASME/IEEE Joint Conference on Railroads Pub Date : 1990-04-17 DOI: 10.1109/RRCON.1990.171666
L. K. Edwards, D. Ahlbeck, P. Lissaman, W. J. Mouton, R. Powell
{"title":"Validation of 'System 21' monobeam transit with computer analysis and large models","authors":"L. K. Edwards, D. Ahlbeck, P. Lissaman, W. J. Mouton, R. Powell","doi":"10.1109/RRCON.1990.171666","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171666","url":null,"abstract":"Validation of four key features of the System 21 aerial rapid transit system is discussed. These are (1) assessment of tension tie between car and beam; (2) dynamic analysis of cars/trains traveling along the guideway at speeds to 100 mph; (3) analyses of guideway beam strength and rigidity; and (4) quarter-scale models to validate outrigger kinematics and modular makeup of the guideway and station. The analyses show that the system designs are valid for beam spans to 80 ft and speeds to 60 mph, with spans of 90 ft and speeds of 125 mph attainable if certain more stringent constraints are met. There are strong indications of suitability for operation at inter-city speeds as well.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131153401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low-cost transponder system for data transmission to trains in remote areas 用于向偏远地区的火车传输数据的低成本转发器系统
ASME/IEEE Joint Conference on Railroads Pub Date : 1990-04-17 DOI: 10.1109/RRCON.1990.171669
R. Hill, J. Palmer, R. Barnard
{"title":"Low-cost transponder system for data transmission to trains in remote areas","authors":"R. Hill, J. Palmer, R. Barnard","doi":"10.1109/RRCON.1990.171669","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171669","url":null,"abstract":"Intermittent transmission of geographical location information or command data to moving trains may be achieved by track-mounted transponders. A need for inexpensive, passive transponders that require no electronics in the track equipment exists in remote areas. A metal-plate transponder system, in which information is encoded in the plate pattern as laid between the running rails, is studied. The design problems are to devise reliable plate detector hardware and to select suitable decoding algorithms, and to achieve protection against erroneous bit detection and incomplete reading of the message bits. The design principles and performance characteristics are stated in detail. The system demonstrates the feasibility of bidirectional decoding with dual direction and orientation capability, low-speed detection, including stopping over the transponder, high-speed detection (with timing validation), and error control, including single-error correction.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116523358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Metro-North/GE AC propulsion system retrofit program Metro-North/GE交流推进系统改造项目
ASME/IEEE Joint Conference on Railroads Pub Date : 1990-04-17 DOI: 10.1109/RRCON.1990.171663
T. McCarthy, L. Ishler
{"title":"Metro-North/GE AC propulsion system retrofit program","authors":"T. McCarthy, L. Ishler","doi":"10.1109/RRCON.1990.171663","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171663","url":null,"abstract":"Two DC-powered 1100 Series cars were retrofitted with an AC propulsion system. Extensive tests were conducted on the propulsion system and the cars are currently in revenue service. The cars selected are 85-ft painted steel multiple-unit cars built by Pullman Standard in 1965. The braking system is a 26CMUE-80 electric pneumatic straight air pipe system supplied by New York Air Brake. The AC inverter propulsion packaging is a three-phase, variable-voltage, variable-frequency, gate turn-off thyristor, voltage-source inverter driving two three-phase, asynchronous traction motors. Each propulsion inverter is a microprocessor controlled, variable voltage, variable-frequency, voltage-source inverter using pulsewidth modulation (PWM) and square-wave regulation techniques. The propulsion inverter control strategy is derived to drive two asynchronous motors operating in parallel.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126072200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Alternative forms of motive power for suburban rail rapid transit 郊区轨道快速交通动力的替代形式
ASME/IEEE Joint Conference on Railroads Pub Date : 1900-01-01 DOI: 10.1109/RRCON.1990.171662
J. Vigrass
{"title":"Alternative forms of motive power for suburban rail rapid transit","authors":"J. Vigrass","doi":"10.1109/RRCON.1990.171662","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171662","url":null,"abstract":"Several forms of motive power are described that could offer much lower implementation costs for suburban rail rapid transit. The same concepts could apply to suburban electrified commuter railroads where electric operation is mandatory on critical center city terminal portions of a system. The proposed alternatives for heavy (i.e., high platform) rapid transit ought to have costs on the order of those usually associated with light rail transit while still providing the spaciousness and comfort associated with suburban heavy rail rapid transit. The unconventional motive power units described are intended to allow extension of existing (or proposed) electric rail transit into distant suburbs using nonelectrified railroad tract that may be abandoned or occasionally used by a freight train.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124431606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electric traction frequency-a specific case 电力牵引频率——具体情况
ASME/IEEE Joint Conference on Railroads Pub Date : 1900-01-01 DOI: 10.1109/RRCON.1990.171668
B. Freeman
{"title":"Electric traction frequency-a specific case","authors":"B. Freeman","doi":"10.1109/RRCON.1990.171668","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171668","url":null,"abstract":"With a recognized need to either rehabilitate and/or replace the largest 25 Hz system in the US (New York to Washington rail corridor), one is faced with technical, operational, economic and political issues. Highlights are presented of some of the major issues which bear on the question of which system, 25 Hz at 12 kV or 60 Hz at 25 kV, to adopt. The role played by the utilities is examined along with operational considerations. Economic considerations are also outlined.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115167422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Haven line catenary replacement 纽黑文线悬链线更换
ASME/IEEE Joint Conference on Railroads Pub Date : 1900-01-01 DOI: 10.1109/RRCON.1990.171665
M. Savchak
{"title":"New Haven line catenary replacement","authors":"M. Savchak","doi":"10.1109/RRCON.1990.171665","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171665","url":null,"abstract":"The replacement of the New Haven catenary system is discussed from the viewpoint of the engineering processes involved in the planning and design of this replacement project. In studying the replacement system, catenary systems worldwide were examined to determine their suitability. One major constraint was the existing support structure spacing of 300 ft. The pantograph study indicated that all existing and proposed pantographs were compatible with the existing system as well as with all of the proposed replacement systems. The railroad is now in the process of seeking bids for the reconstruction effort.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121580257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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