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Kontrollenhet för spårtaxi
KTH, School of Industrial Engineering and Management (ITM).
2017 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Control unit for PRT-System (Swedish)
Abstract [sv]

Detta projekt har genomförts i samband med ett kandidatexamensarbete vid KTH, Kungliga Tekniska högskolan. Rapporten beskriver processen av att ta fram ett hjälpmedel till att kunna kontrollera en vagn för spårtaxi-bolaget SkyCab. I ett spårtaxisystem rör sig flertalet vagnar autonomt per definierat rörelsemönster efter vad passagerare önskar. Vid en händelse av oförutsett stopp skall en anställd tekniker kunna ta sig till platsen och lösa problemet. Det var detta projekts mål att utveckla ett hjälpmedel till denna tekniker och på så vis förenkla processen av att hantera en krissituation. För att begränsa definiera omfattning begränsades nivån till vilket problem som skulle lösas. Endast fel då vagnarna ej är fysiskt skadade och dess vitala funktioner är intakta skulle behandlas. En bred marknadsundersökning gjordes kring liknande PRT-system för att bredda bilden om marknadens dagsläge. Även en undersökning kring kontrollsystem i helt andra industrier genomfördes för att bredda synfältet. En konceptgenerering genomfördes för att ta fram koncept att jobba ifrån, från dessa togs krav fram. Ett koncept valdes utefter kraven för att sedan genomföra ytterligare konceptgenerering. För att välja slutkoncept togs krav fram ifrån en etablerade användarprofil samt en undersökning inom ergonomi. Vidare gjordes specifika tester och prototyper kring greppbredder och handtagstyper från vilka de optimala valdes. Utifrån dessa valdes ett slutkoncept som sedan modellerades i Solid Edge ST7 och delades upp i delar som köpes in som standardkomponenter och de som skall tillverkas på nytt. En kostnadsanalys genomfördes och en färdig produkt kan tänkas levereras för ett pris under 7500 kronor. För att utvärdera enhetens hållbarhet användes programmet ANSYS Workbench för att modellera lastfall möjliga under dess normala användning. En instruktion för montering av produkten konstruerades och presenteras.

Abstract [en]

This project has been conducted in connection to a bachelor’s thesis at KTH, the Royal Institute of technology. This rapport spans the process of creating a tool with which a technician shall be able to control a cart from the PRT-company SkyCab. In a PRT-system there are several carriages moving autonomously via a pre-defined movement pattern decided by what the passenger wishes to do. In the event of an unforeseen stop or malfunction of the carriage a technician must be able to get to the situation and solve the problem. The goal of this project was to deliver a tool to this technician and by doing so simplify the process of handling a stressful situation. To limit the scope of the project the level at which it is to be solved was limited. Only unforeseen stops where the carriages themselves were not damaged and their vital functions are still in working order were to be solved. A broad market research was conducted in order to gather information on similar PRT-systems and to understand the current market situation. Other control systems with completely different areas were also targeted to try to find solutions and information from applicable areas. A concept generation process was performed in order to create a few initial concepts. From this a concept was chosen and another concept generation process was conducted. To choose which concept to continue working on a thorough analysis of the demands of such a product was performed. This included taking into account the demands of ergonomic factors as well as the established user profile. Furthermore, specific tests regarding grip width and types of handles were performed by allowing test subjects to use simple prototypes. From these demands a concept was chosen, modelled in Solid Edge ST7 and divided into pieces which could be bought as standard components as well as pieces which were to be created in- house. A cost analysis showed that the finished product could be delivered at a cost of less than 7500 SEK. To evaluate the strength of the product the program ANSYS Workbench was used to create a load case were both stress and dislocation was analyzed. The product was deemed to be strong enough. An instruction for how the product was to be mounted was created and can be seen in this report.

Place, publisher, year, edition, pages
2017.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-217830OAI: oai:DiVA.org:kth-217830DiVA, id: diva2:1157963
Supervisors
Examiners
Available from: 2017-11-17 Created: 2017-11-17 Last updated: 2017-11-17Bibliographically approved

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