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Design of vehicles for use at The Great Wall of China
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Design av fordon för användning vid Kinesiska muren (Swedish)
Abstract [sv]

Den kinesiska muren är ett av de mest populära resmålen för nationella och internationella turister i Kina. För den som besöker detta underverk väntar branta och höga trappor men samtidigt också en häpnadsväckande vy. Projektets mål har varit att utveckla ett förslag till en lösning för att göra detta turistmål mer tillgängligt för rullstolsburna turister. En specifikationslista sammanställdes efter flertalet besök vid de olika sektionerna av den kinesiska muren kring peking vilket resulterade i höga krav på navigering över branta och oregelbundna trappsteg. Ytterligare var den givna tillgängliga volymen för ett fordon knapp då en låg tyngdpunkt var förmånlig samt att portarna på kinesiska muren var väldigt smala. Undersökning av befintliga terrängfordon, motoralternativ och drivmedel visade att ett batteridrivet bandburet fordon var det bästa alternativet tack vare sin utrymmeseffektivitet, däremot var energieffektivteten låg på grund av större förluster vid styrning. Ett större batteri gynnade dock den lägre tyngdpunkten. Det förslagna fordonet som tagits fram uppfyllde majoriteten av kravspecifikationen men inte kraven som ställdes på stabilitet i vinklar större än ±41°. Då förslaget som tagits fram inte är komplett eller slutgiltigt finns ytterligare arbete att utföra. Rekommenderat är att utföra mer omfattande simuleringar av en komplett modell. Med det nuvarande underlaget som utgångspunkt finns god möjlighet att utveckla ett fordon anpassat för lägre krav.

Abstract [en]

The Great Wall of China is one of the most popular destinations for national and international tourists in China. Steep and perilous stairs await those who take on this wonder of the world, but also a gorgeous view. The focus of this project has been to develop a proposal to make this tourist attraction more accessible to tourists traveling by wheelchair. A list of specifications was composed after multiple visits at the different wall sections surrounding Beijing, resulting in high requirements in regards to navigation over steep and irregular stairs. The calculated volume for any suggested vehicle was very low, partially due to the desire to keep a low center of gravity for the sake of stability, but also due to the narrow gates on the wall. The conclusion from research of current terrain vehicles, motor options and sources of energy was that a battery powered tracked vehicle was the best alternative. This was due to tracked vehicles being more space efficient, but it comes at the cost of increased power output caused by high friction when turning. The resulting larger battery was however a positive influence as it could be used to lower the center of gravity. The proposed vehicle that was developed fulfilled the majority of the specifications list, however, it could not fulfill the requirement of maintaining stability over angles larger than ±41° in a safe manner. As the proposal is not final nor complete, much work remains. It is strongly recommended to perform simulations of vehicle behavior and movement with a complete model. With current data, a good foundation has been laid if further development of similar vehicles, designed for more forgiving parameters is desired.

Place, publisher, year, edition, pages
2013. , 95 p.
Series
MMK 2013:75 IDE 087
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-141166OAI: oai:DiVA.org:kth-141166DiVA: diva2:695281
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Available from: 2015-10-15 Created: 2014-02-10 Last updated: 2015-11-12Bibliographically approved

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