{"title":"Parallel computer simulation of autotransformer-fed AC traction networks","authors":"R. Hill, I. Çevik","doi":"10.1109/RRCON.1990.171674","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171674","url":null,"abstract":"Simulation of electrical conditions in power lines and rails in an on-line mode in AC and DC electrified railways is necessary for effective engineering design. A description is given of the use of a parallel computer to simulate voltages along an autotransformer-fed AC railway. The algorithm, based on the solution of algebraic equations for a single train, produces a faster-than-real-time continuous display of the catenary and rail voltages, with a historical record of train voltage as the train moves along the section. The simulation implemented enables parametric analyses to be made to optimize the power feeding, and shows that operation with constant current, rather than constant power, leads to better regulation of catenary voltage.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"5 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":"127179475","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}
{"title":"Computer-aided maintenance and renewal of track","authors":"C. Esveld","doi":"10.1109/RRCON.1990.171675","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171675","url":null,"abstract":"An approach is described for analyzing the deterioration of track components, and methods are suggested for helping the engineer decide when maintenance is necessary and when is the best time for renewal. The data needed for proper monitoring of various types of track deterioration are discussed. Where techniques for predicting deterioration and failure exist they are described. Suggestions are made as to how these predictive techniques could be used to help maintenance and renewal decisions.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"89 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":"123327206","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}
{"title":"High speed rail transportation on existing infrastructure-the Swedish approach","authors":"P. Olson","doi":"10.1109/RRCON.1990.171659","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171659","url":null,"abstract":"A description is given of the background for the track/train dynamics research and design carried out in Sweden as a joint effort between the operating and the producing and constructing interests. The policy to utilize the infrastructure for both high-speed passenger service and fast-freight service is discussed. The development and introduction of the X2 Fastrain passenger system are reviewed.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"121 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":"123804391","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}
{"title":"A review of rail corrugation processes under different operating modes","authors":"D. Ahlbeck, L. E. Daniels","doi":"10.1109/RRCON.1990.171655","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171655","url":null,"abstract":"After an extensive literature review was conducted as part of a study of rail corrugations on the Baltimore, Maryland, Metro track, basic differences in long-wavelength (heavy-haul railroad) and short-wavelength (transmit and higher-speed passenger railroad) corrugations were established. Consideration of these differences, along with analysis of the experimental data from both wayside and on-board transducers, allowed a focused theoretical analysis of the corrugation problem. The overall corrugation problem is discussed, based on the results of the literature review, and the results of the analysis are given. Some general conclusions and methods for controlling corrugations are presented.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"67 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":"121932074","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}
{"title":"System considerations for heavy haul diesel-electric locomotives with three phase traction motors","authors":"R. Becker, J.S. Boggess","doi":"10.1109/RRCON.1990.171656","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171656","url":null,"abstract":"A locomotive transmission study has been performed to determine the requirements and design of new three-phase traction drive components for independent bogie control on a six-axle freight locomotive. System considerations that affect locomotive high tractive effort capability and component ratings were investigated using computer models of the traction drive components. These include traction motor load sharing due to wheel-rail friction creep conditions, bogie weight shift, motor torque-speed characteristics, and wheel-diameter variations. The methodology, results and conclusions of the study are presented in detail.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"1 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":"132823622","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}
{"title":"Effect of maintenance practices upon performance of freight car railroad trucks-progress report","authors":"V. T. Hawthorne, R.P. Sellberg, R. Wronkiewicz","doi":"10.1109/RRCON.1990.171654","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171654","url":null,"abstract":"A joint effort between American Steel Foundries and Trailer Train Company to quantify the effect of truck wear upon truck performance is described. Three measurable parameters were selected to evaluate the effect of wear upon the suspension system; warp stiffness, damping force, and spring force-displacement characteristics. A NUCARS analysis of the Trailer Train bilevel autorack car to determine the effect of wear upon the ride and hunting performance was carried out. This phase of the program established the feasibility of using shoe height as an indicator of the performance of the vehicle relative to the service life.<<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":"133613157","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}
{"title":"Benefits of a driver advice system for light rail commuter lines","authors":"G. English, B. Benjamin, Peter Pudney","doi":"10.1109/RRCON.1990.171660","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171660","url":null,"abstract":"The effectiveness of a microprocessor-based coast advice system for commuter train operations is evaluated via computer simulation. A software and hardware system that was developed is tested on a four-car GO Transit train operating in normal service. Predicted fuel savings range from 10% to 20% depending on the locomotive used. There was good agreement between the simulation analysis and revenue service test results.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"9 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":"114186725","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}
{"title":"Software design criteria for the safety-critical protection of automated transit systems","authors":"G. S. Krut","doi":"10.1109/RRCON.1990.171657","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171657","url":null,"abstract":"As the microcomputer replaced discrete logic in safety-critical applications, it became necessary to reexamine the methodologies used to analyze, design, and test such products. From the new methodologies established, fifteen software design rules have been created to ensure the safety of automated transit systems. It is shown that the fifteen software design rules along with a top-down structured and systematic design approach provide the software engineer with the tools and techniques to ensure against: (1) an omission or misapprehension of a safety-related requirement: (2) mistakes in the interpretation or the coding of a safety-related task: and (3) miscommunication or imperfect definition of the design objectives among those responsible for the certification of a design.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"6 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":"114145950","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}
{"title":"Analysis of railway vehicle system dynamics with the multibody program MEDYNA","authors":"W. Kortũm","doi":"10.1109/RRCON.1990.171661","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171661","url":null,"abstract":"The general-purpose program MEDYNA is described with respect to its capabilities for analyzing the dynamics of railway systems. The modeling capabilities, the computational methods, and software aspects are addressed. Special emphasis is placed on MEDYNA's modeling assumptions for the wheel-rail contact mechanics and the railway operational modes such as critical speeds, dynamic curving, and vehicle-guideway interaction. The use of MEDYNA for typical problems associated with the development of the ICE train is demonstrated.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"19 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":"122342700","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}
R. R. Newman, R. C. Leedham, J. Tabacchi, D. Purta, G.G. Maderer, R. Galli
{"title":"Hot bearing detection with the 'SMART-BOLT'","authors":"R. R. Newman, R. C. Leedham, J. Tabacchi, D. Purta, G.G. Maderer, R. Galli","doi":"10.1109/RRCON.1990.171667","DOIUrl":"https://doi.org/10.1109/RRCON.1990.171667","url":null,"abstract":"Advances in communication electronics and battery technologies as well as innovative packaging ideas have lead to the development of a thermal sensor bolt which provides for real-time, continuous monitoring of bearing temperatures. The thermal sensor replaces a standard bearing end cap bolt at each end of an axle. The thermal sensor and transmitter contained in the body of the bolt. When activated, transmit a distress signal directly to the engineer in the locomotive. The system consists of a battery as a power source, a thermomechanical sensor and actuator, a transmitter, and a receiver. Tests in railroad service continue at Burlington Northern Railroad as the SMART-BOLT production models are manufactured. Commercialization of the technology is currently under development for application of the SMART-BOLT throughout the industry.<<ETX>>","PeriodicalId":115410,"journal":{"name":"ASME/IEEE Joint Conference on Railroads","volume":"14 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":"131354970","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}