Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Train control"”.
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A study of automatic train control
Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1929
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Security of Communication-Based Train Control Systems
Communication-Based Train Control (CBTC) systems are automatic train control systems that rely on bidirectional communications between trains and wayside units to exchange train status information and operational commands. Introducing wireless technologies changed train control systems to …
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Optimal train control on various track alignments considering speed and schedule adherence constraints
… contributes to the field of transit operational control to reduce energy consumption. Due to the recent increase in gasoline cost, a significant number of travelers are shifting from highway modes to public transit, which also induces higher transit energy consumption expenses. This study …
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Development and application of a probabilistic risk assessment model for evaluating advanced train control technologies
Quantitative research on risk and train control has traditionally relied exclusively on historical accident data. In this thesis, a model is developed that enables a probabilistic rather than statistical assessment of safety improvements achieved with advanced train control technologies. This …
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The impact of operational strategies and new technologies on railroad capacity
… are expected to face increasing capacity constraints due to substantial, expected long-term growth in traffic. In order to meet this forecasted demand railroads must efficiently use existing capacity and effectively plan new capacity. Infrastructure to provide this capacity is …
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Dispatching logic, corridor simulation, and train following algorithms to quantify the benefits of virtual and moving block control systems on North American freight railroad mainlines
… of virtual and moving block railway control systems on North American freight railroad mainline corridors. Virtual and moving block control systems are one potential strategy for improving mainline operations such that corridors currently operating at capacity can maintain performance …
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Developing an integrated rail simulator for SimMobility
… through the implementation of a Service Controller able to read user-written LUA files, it is shown that the rail simulator is able to model a wide variety of different scenarios and policies. The rail simulator is then calibrated using a novel sequential calibration method, where …
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Optimizing Traffic Network Signals Around Railroad Crossings
… Optimization Under Rail Crossing sAfety cOnstraints"(SOURCAO), to the traffic signal control near a highway rail grade crossing (HRGC). SOURCAO targets two objectives: HRGC safety improvement (a high priority national transportation goal) and highway traffic delay reduction (a common desire …
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Quantitative Laser-based Assessment of Top of Rail Friction Modifiers for Railroad Application
… practices in applications such as Positive Train Control (PTC).
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Deterministic and stochastic braking distance prediction of disc-braked rail vehicles
… of 120km/h , the braking distance of the train is predicted with an accuracy of 5%. No significant deviations are observed for other load cases. Moreover, this work presents a novel probabilistic approach that allows to consider the stochastic nature of frictional brake forces when …
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Application of CAST and STPA to railroad safety in China
… MIT, was used here to re-analyze a High Speed Train accident in China. On July 23rd, 2011, 40 people were killed and 120 injured on the Yong-Wen High Speed Line. The purpose of this new analysis was to apply the broader view suggested by STAMP, considering the whole socio-technological system …
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Utilization of fixed film media in BNR activated sludge systems
… process. Four separate pilot-scale treatment trains were constructed and operated during this research. Three of the four treatment trains were operated with fixed film media (Ringlace/Captor) incorporated in the aerobic zone of the system and are referred to as the Integrated Fixed Film …
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Dynamic Braking Control for Accurate Train Braking Distance Estimation under Different Operating Conditions
The application of Model Reference Adaptive Control (MRAC) for train dynamic braking is investigated in order to control dynamic braking forces while remaining within the allowable adhesion and coupler forces. This control method can accurately determine the train braking distance. One of the …