This diploma thesis deals with conceptual design chassis of tractor trailer with maximum weight 21 000 kg. First part of thesis introduces reader with division of constructal chassis elements. Next part deals with conceptual chassis design. The final part deals with strenght control of chassis frame, which has been designed in previous chapter. In last part of the thesis deals with stress control designed construction of the frame. Drawing documentation of chassis frame is a part of the thesis

In this diploma thesis, I deal with conception and strength analysis of lowbed detachable gooseneck trailer for construction machinery. First part of thesis is about trailers used these days with brief legal requirements for this device. Rest of the thesis contains construction of trailer, creation of finite element model, and presentation of achieved results. This diploma thesis contains drawing documentation.

The goal of this thesis is structural design of the trailer for a LASKI chippers and to create a construction drawings. Important part is information about legislation rules, which this trailer has to fulfill. The aim of this work is to do a dynamic simulation using multi-body system. Results of this simulation are used for a stress analysis witch using a fine element method.

Topic of master´s thesis is design of pressure washer trailer system which is independent of external sources of energy and water. Its compact dimensions and relatively low weight can provide use with standard car. Design must respect main requirements of ergonomic, technology and esthetic aspects.

This thesis presents the theory, methodology and results of building, tuning and testing a prototype for controlling body roll movement. Body roll is a result of lateral acceleration that acts on a vehicle when turning and result in torque on the roll center of the vehicle. The objective of this thesis is, in collaboration with Freno Air AB [7], to build a prototype and, with the help of sensors and micro controllers, restrict the body roll to avoid roll over on a semi-trailer that the company builds. The control unit in this thesis includes two PID controllers that is vastly used today in many different applications. The control unit is fed with signals from two pressure sensors on each side of the prototype frame. The pressures are given by four syringes, two on each side that are connected to the pressure sensors. One PID has small gains of KP = 0.2, KD = 0.005 and KI = 0 to take care of smaller and slower variations of pressure difference and one PID with higher gains of KP = 1, KD = 1 and KI = 0 to take care of faster and bigger variations in pressure difference which in both of the cases the pressure difference translates to body roll. The pressures give is enough of information of the prototypes state to be able to control it with the help of a motion platform that is able to roll in opposite direction to equalize the pressures. The results for the two cases of slow roll and fast roll are promising with a fast response, few oscillations and overshoots, which makes the system fast and stable, two things that are opposites in the world of closed loop control. The experiment was performed in a stationary form with applied disturbances and actuated with a motion platform capable of roll rotation.

This report describes the Chinese truck transport industry; how companies in that industry manage their businesses and the problems they face regarding how they can conduct their long-haulage transport business as efficiently as possible. The method used in this thesis is a qualitative approach where data mainly have been collected through interviews with transport companies. Initially, the components necessary for road transport are discussed, what separates them and how legal demands limit them. Through studies and interviews with transport companies in China and Europe, differences between the different continents are identified in terms of development level and efficiency in logistics handling. These aspects are connected to factors such as salary differences and legislations to finally identify three key segments for the Chinese market. These segments are then analyzed individually and compared against each other to identify one segment where an optimized semi-trailer could improve the current segment and also be an attractive product, for transport companies in that segment as well as for semi-trailer manufacturing companies. Specifications for a proposed semi-trailer are suggested based on needs for that segment. Finally different options for the introduction of such a product at the Chinese market are investigated considering risk-taking, profit requirements and feasibility. This study shows and arguments that there is a big market potential for better semi-trailers than the ones used in the market today and that the segment with the biggest improvement possibilities is a segment where both weight and volume are bottlenecks in the daily business. This study further shows that a high potential can be seen through a growing market and new legislations in China which implies that current semi-trailers will have to be phased out within a period of fifteen years to a product that fulfills the new legislations. / Denna rapport beskriver den kinesiska lastbilstransportmarknaden, hur aktörerna på denna bedriver sin verksamhet och vilka problem de står inför med avseende på att bedriva sin verksamhet så effektivt som möjligt. Använd metod är en kvalitativ approach där data huvudsakligen införskaffats genom intervjuer med transportföretag. Inledningsvis diskuteras de ingående fordonstyper som utgör en bas för lastbilstransporter, deras olika egenskaper, vad som skiljer dem åt och hur lagkrav begränsar dessa. Genom studier och intervjuer av transportföretag i Kina och Europa identifieras olikheter mellan de två kontinenterna vad gäller utvecklingsgrad och effektivitet i logistikhantering. Dessa kopplas ihop med faktorer så som löneskillnader och lagkrav för att slutligen dela upp den kinesiska marknaden i tre segment. Dessa segment analyseras därefter individuellt och ställs mot varandra för att identifiera ett segment där en optimerad semi-trailer dels skulle kunna förbättra det befintliga segmentet men också utgöra en attraktiv produkt för de företag som befinner sig däri, samt för företag som producerar semi-trailers. Specifikationer för den föreslagna semi-trailern läggs fram baserat på behov i det segmentet. Slutligen utvärderas olika möjligheter för att introducera en sådan produkt på den kinesiska marknaden med avseende på risktagande, vinstkrav och genomförbarhet. Denna studie visar och argumenterar för att det finns en stor marknad för bättre semi-trailers än de som marknaden för närvarande använder och att det segment där störst vinst kan göras är ett segment där både vikt och volym utgör flaskhalsar för den dagliga verksamheten. Studien visar vidare att det finns en potential i semi-trailerförsäljning på den Kinesiska marknaden genom förändrade lagkrav vilka kräver att nuvarande semi-trailers byts ut från marknaden inom en femtonårs period och ersätts med nya lagliga.

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.

This diploma thesis deals with proposal three-side tipping body of tractor semi-trailer with maximum weight 23 tons. In beginning the thesis includes background research part and design of conception body inclusive back door. In the middle part thesis contains the strength calculations using the finite element method, shape optimization and check strength calculation. Strength checks consider especially deformation and strain analysis in different load angle states. The work is finished by analytical calculations included partial body of semi-trailer. Enclosed are graphic illustrations results in program ANSYS Workbench. Part of the thesis is also design documentation. Work is created in co-operation with company ZDT Ltd. Body is designed for universal for multipurpose versatile body carrier Mega 230.

The shopping trolley have been frequently used in our daily life. However, the hygiene condition of cart makes people worry a lot, especially the handle brothers. Nowadays, several methods have been proposed to clean the shopping carts but considered uneconomic and inflexible. In this study, we aim to design an integrated cart washing system based on a trailer applied to medium or small supermarket. This system should be more efficient, economic, easily to operate, safer and les water consummation. The integrated cart washing system has three basic functions of washing, disinfection and drying. The system is controlled by PLC program, all steps in the cleaning process are fully automatic insider the trailer and each component are adjustable according to various shopping carts. The system only requires one person to operate and it costs 30 seconds to wash a single cart, able to wash up to 120 cart/hour. Disinfection and drying steps provide high washing quality. Moreover, water-recycling design can save part of wasted water. The modelling and assembly was designed in Autodesk Inventor 2016, the hardware design circuit-writing diagram was performed in AutoCAD, the software design of Programmable logic controller (PLC) was made in STEP 7-Micro/Win. Theoretical calculation and simulation prove the safety and possibility of our system. We concluded that this system might have commercial interests in the market.

How can movie production companies speak to their potential audience thru movie trailers? Which means do they use and what is the public reception? How does a viewer interpret a movie trailer? What can we learn about viewers from movie trailers? This thesis is offering all the answers to questions mentioned above in two different parts - in the first part the concepts of movie trailers are introduced and explained, the second part analyses the outcomes of a research which studies the affects of movie trailers on potential audience. Collected data through quantitative methods of two uniform groups on the topic of movie trailers were studied by focus groups. This thesis focuses on understanding the approach of viewers on movie trailers and is trying to clarify when the movie trailers can act as a decision maker in order to change the approach and behavior of the audience. Thesis aims to offer a broader overview to the relationship between movie trailers and viewers and propose a guide how to read audiovisual works critically. The intention is to uncover that the scheme between text and context is characterized by complex processes of mediation and interpretation on the level of production, propagation and reception. The outcomes of the study can help to understand how viewers as consumers interpret...