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Optimalizace parkovacích stání pro autobusy a nákladní vozidla / Optimization of parking spaces for buses and trucksBedřich, Marek Unknown Date (has links)
Main focus of diploma thesis is optimalization of dimensions stated in parking norm ČSN 73 6056 Parking areas for road vehicles. Goal of the thesis was to optimalize dimensions stated in norm from 2011, eventually come up with a new type of parking space. Thesis is based on recherche, which was done on both previous and actual Czech norms as well as on foreign norms. Change in dimension was possible due to evaluation of swept paths of the individual parking slots. New suggested dimensions are stated in the conclusion.
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Evaluation of real drive data of a refuse fuel cell truck / Utvärdering av verkliga kördata för en sopbil med bränslecellEurén, Hampus January 2023 (has links)
Ett konsortium bestående av Scania, JOAB, Powercell, KTH och Renova samarbetade för att designa och konstruera en bränslecellsdriven sopbil inom ett FFI-finansierade projekt. Sopbilen har sedan dess varit i drift i Göteborg från 2020 till 2023, med en vätgasinfrastruktur bestående av en tankstation vid tidpunkten för detta arbete. Under den tiden har bränslecellen genomgått kör- och stillastående tester. Verkliga kördata på sopbilens system och bränslecell registrerades. Databaserna var osynkroniserade i tid och därför krävdes datasynkronisering. Detta examensarbete inleddes med huvudsyftet att utveckla ett accelererat åldringstest för bränslecellen baserat på denna applikation. Ett ytterligare syfte var att utvärdera bränslecellens åldrande. På grund av de tillgängliga variablerna baserades bränslecellens åldrande på försämring av elektrisk effekt vid konstanta temperaturer och strömmar. En testcykel (eller effekt-cykel) baserad på testkörningen av sopbilen utvecklades istället. Genom att använda den etablerade metoden "k-means clustering" på bränslecellens effekt-cykler skapades en testcykel som var representativ för sopbils-körning från 2020 till 2023. Testcykeln validerades baserat på ett statistiskt kriterium, verifiering och ytterligare arbete krävs dock. Efter 141,80 timmars bränslecellsdrift kunde ingen åldring identifieras. Mer data från sopbilen behövs och faktumet att ytterligare en vätgastankstation kommer att installeras under 2023 i Göteborg innebär att sopbilens körmönster kan förändras. Resultaten från denna avhandling lägger dock grunden för framtida forskning och erbjuder ett tillvägagångssätt för att studera den bränslecellsdrivna sopbilen. / A consortium consisting of Scania, JOAB, Powercell Sweden AB, KTH, and Renova collaborated to design and engineer a fuel cell-powered refuse truck within a FFI-funded project. The refuse truck has been operational in Gothenburg since 2020, with a hydrogen gas infrastructure of one refuelling station at the time of this work. From 2020 to 2023, the fuel cell has gone through driving and standing still tests. Real drive data on the truck's system and fuel cell was recorded. The databases were unsynchronised in time, hence data synchronisation was required. This thesis began with the main aim of developing an accelerated stress test for the fuel cell based on this application. Additionally, the aim was to evaluate the ageing of the fuel cell. Due to the available variables, fuel cell ageing was based on deterioration of fuel cell powers at constant temperatures and currents. A test cycle (or power cycle) based on refuse truck test driving was developed instead. By utilising the established “k-means clustering” method on fuel cell power cycles, a test cycle representative of the truck operation from 2020 to 2023 was made. The test cycle was validated based on a statistical criterion, although verification and further work are required. After 141.80 hours of fuel cell power requests no ageing could be identified. More data from refuse truck operation is needed, also considering that an additional hydrogen refuelling station will be put in place in 2023 in Gothenburg, hence the drive pattern might vary. In this context, however, the results from this thesis lay the foundation for future research and offer an approach to study the fuel cell truck.
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Crash Prediction Models on Truck-Related Crashes on Two-lane Rural Highways with Vertical CurvesVavilikolanu, Srutha January 2008 (has links)
No description available.
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Platoon Coordination of Electric Trucks at a Charging StationBjörklund, Elin, Lindstedt, Ebba January 2022 (has links)
Electric trucks and platooning technology are expected to be part of the transportation system in the near future. Therefore, it is important to develop platoon coordination strategies and study the potential of platooning for when trucks are electric. In this paper, we study the platoon coordination problem at a single charging station where electric trucks can charge while they wait for other trucks to form platoons with.We assume all trucks to have identical routes after the charging station. The objective is to maximize the total reward of all trucks, including the platooning profit and cost of waiting.Moreover, the trucks have waiting time constraints to respect their mission deadlines and charging time constraints to make sure they can travel between the hub and destination without running out of battery. The energy consumption is decreased when driving as a follower truck in a platoon, which decreases the minimum charging time for the truck. We formulate the platoon coordination problem of electric trucks as a linear integer optimization problem. To evaluate the method, it was compared to a simpler coordination method. The savings from platooning with electric vehicles, using both coordination methods, were also compared to platooning with diesel trucks. The results showed that platooning with electric vehicles can save up to 10% of the driving cost and therefore have significant economic benefits. It was also shown that the method has an acceptable computational efficiency for real-time coordination. / Inom en snar framtid förväntas elektriska lastbilar och platooning vara en del av transportsystemet. Det är därför viktigt att utveckla strategier för platoonkoordinering och undersöka potentialen av platooning med elektriska lastbilar. I det här pappret studerar vi ett platoonkoordineringsproblem med en gemensam startpunkt och en gemensam slutpunkt för alla lastbilar. Startpunkten är en laddningsstation där lastbilarna kan kombinera laddning med att vänta in andra lastbilar att forma platooner med. Lastbilarna i systemet har även samma rutt mellan de två punkterna. Målet är att maximera den totala vinsten för alla lastbilar, med hänsyn till både platooningvinsten och kostnaden för att vänta. Utöver det har lastbilarna begränsad väntetid för att hålla sina deadlines. Vi behöver även ta hänsyn till lastbilarnas laddningstider då de behöver ha tillräckligt med laddning för att åka hela resan från startpunkt till slutdestination. Energikonsumtionen minskar när en lastbil åker som följare vilket minskar den minimala laddningstiden som behövs för att åka hela sträckan. Vi formulerar koordineringsproblemet med elektriska lastbilar som ett linjärt heltalsoptimeringsproblem. För att utvärdera metoden jämfördes den med en enklare koorineringsmetod. Besparingarna från platooning med elektriska lastbilar, med båda koordineringsmetoderna, jämfördes även med platooning med diesellastbilar. Resultatet visade att platooning med ellastbilar kan spara upp till 10% av körkostnaderna och har därför betydande ekonomiska fördelar. Det visades också att metoden har en acceptabel beräkningseffektivitet för koordinering i realtid. / Kandidatexjobb i elektroteknik 2022, KTH, Stockholm
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AutoTruck : Automated docking with internal sensors / Självparkerande lastbilAndersson, Oscar, Molin, Lucas January 2018 (has links)
The purpose of this bachelor thesis was to discover howan articulated vehicle can park itself using a pre-definedparking path with a combination of ultrasonic sensors aswell as a rotary angle sensor.The project was divided into two parts: constructing asmall scale demonstrator and the software controlling thedemonstrator. The demonstrator was constructed from offthe-shelf components and custom parts. The truck was designedbased on a rear wheel driven truck with Ackermannsteering. The localization of a parking spot and measuringother distances was done with ultrasonic sensors and thehitch angle was measured by a rotary angle sensor.The performance of the demonstrator was evaluated bymeasuring the trailers angle difference from the center lineof the parking spot.The performance was deemed to be reasonably goodwith successful parkings in 8 out of 10 attempts. / Kandidatarbetet syftar till att undersöka hur ett ledatfordon kan parkera sig självt efter en förbestämd parkeringsruttmed en kombination av flera ultraljudssensorersamt en vinkelgivare.Projektet består av två delar; konstruktion av ett miniatyrfordonsamt mjukvaran som styr fordonet. Fordonettillverkades från butiksköpta komponenter och skräddarsyddadelar. Lastbilens design var baserad p°a en bakhjulsdrivenAckermannstyrd lastbil. Identifieringen av en parkeringsplatssamt avståndsmätning hanterades av ultraljudssensoreroch hitch vinkeln mättes av en vinkelgivare.Miniatyrfordonets prestanda utvärderades genom attmäta släpets vinkelskillnad från centerlinjen av parkeringsplatsen.Prestandan ansågs att vara tillräckligt god med lyckadeparkeringar i 8 av 10 tester.
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Greenhouse gas emissions and energy efficiency of various renewable energy pathways in the truck industry : An LCA and energy efficiency analysis on fuel production for and manufacturing of 40 tonne heavy trucks in SwedenAxell, Jacob January 2023 (has links)
This study focuses on assessing the greenhouse gas emissions and energy efficiency of 40-tonne haulage trucks in fuel production and manufacturing in a Swedish context. The aim was to provide accurate greenhouse gas accounting and evaluate the contribution to mitigating climate change. Four scenarios were analysed: hydrogen from steam reforming, hydrogen from electrolysis, biomethane from biogas, and electricity in battery-electric vehicles. A comprehensive methodology involving literature review, data collection, and CO2 emissions calculations was employed. The manufacturing stage had higher CO2 emissions than fuel production for all scenarios. Hydrogen from steam reforming had the lowest emissions during manufacturing, while LBM from organic waste had the lowest emissions during fuel production. Sensitivity analysis highlighted the importance of lifespan, fuel consumption, and electricity generation in emissions. This research provides insights into renewable technologies and underscores the need for optimization to achieve climate goals. The study supports EU and Swedish climate laws and emphasizes the significance of considering the full life cycle of fuels to accurately assess their environmental impact.
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Integrating Advanced Truck Models into Mobile Source PM2.5 Air Quality ModelingPerugu, Harikishan C. 25 October 2013 (has links)
No description available.
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Transportation Route Optimization for the State of Ohio’s Inland Waterway System: A Case Study for Mid-Ohio River Valley RegionCelikbilek, Can January 2015 (has links)
No description available.
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Highway Religion: Truckstop Chapels, Evangelism, and Lived Religion on the RoadGreenberg, David Brett January 2011 (has links)
No description available.
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Truck Testing and Load Rating of a Full-Scale 43-Year-Old Prestressed Concrete Adjacent Box Beam BridgeSetty, Clinton J. 18 April 2012 (has links)
No description available.
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