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Visar resultat 1 - 5 av 15 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Flexible project management in highly regulated railway signaling projects

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Teresa Talio; [2023]
    Nyckelord :Signalling; Railway; System development; Systems Engineering; Lean Philosophy; Stage-Gate Process; Signalering; järnväg; systemutveckling; systemteknik; Lean-filosofi; Stage-gate-processen;

    Sammanfattning : Railway is a complex system, with many components that are linked with one another. If a failure occurs in a sub-system, it can affect the functionality and the safety of the whole. Signalling represents a crucial component of the railway system because it ensures safety, and it can optimize capacity on the lines. LÄS MER

  3. 2. Energy Harvesting for Health Monitoring Balises : Analytical study

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Leire Carreras Orobengoa; [2021]
    Nyckelord :Balise; Energy harvesting; Railway signaling; Wireless communication networks;

    Sammanfattning : Balises are transponders installed in railways. These devices are nowadays powered by means of a radiofrequency signal emitted by each running train that passes above them. It is only during this moment that the health state of the balises is checked. LÄS MER

  4. 3. Towards a Correct-by-Construction design flow : A case-study from railway signaling systems

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Marcus Hanikat; [2021]
    Nyckelord :Correct-by-Construction; Safety-critical; Formal modeling; ForSyDe; Simulink; Model-based design; EN 50128; Korrekt-vid-Konstruktion; Säkerhetskritiska system; Formell modelering; ForSyDe; Simulink; MATLAB; Modeleringsbaserat utvecklingsflöde; EN 50128;

    Sammanfattning : As technological advancements and manufacturing techniques continues to bring us more complex and powerful hardware, software engineers struggle to keep up with this rapid progress and reap the benefits brought by this hardware. In the field of safety-critical system development, where a thorough understanding and deterministic nature of the hardware often is required, the cost of development closely relates to the complexity of the hardware used. LÄS MER

  5. 4. Utvärdering av roterande borstlösfrekvensomformare tillspårledningar

    M1-uppsats, KTH/Hälsoinformatik och logistik

    Författare :Leith Aldahan; Ivan Kudoori; [2019]
    Nyckelord :Frequency converter; induction motor; track circuit; asynchronous motor; railway signaling; reluctance motor; RAMS; Frekvensomformare; asynkronmotor; spårledning; asynkronmaskin; signalsystem; reluktansmotor; RAMS;

    Sammanfattning : Spårledningar används inom tunnelbanan för att visa tågets position samt bestämma tågets hastighet genom att bryta spänningsamplituden i signalen vid olika frekvenser. Frekvensen till spårledningen fås från en roterande frekvensomformare. I dagens anläggning används roterande frekvensomformare med borstar. LÄS MER

  7. 5. Development of new criteria for train detection and evaluation in critical conditions

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Sofiane Kerbal; [2019]
    Nyckelord :railway signaling; train detection; track circuit; shunt; frequency modulation; frequency-shift keying modulation; third-order harmonic; short-time Fourier transform; power spectral density estimation; cross-correlation;

    Sammanfattning : Railway signaling is of paramount importance to ensure traffic management andsafety on the rail network. The main lines are divided into sections called ‘blocks’,which are governed by a fixed signal installation. To prevent trains from colliding,each block allows one train at once. LÄS MER