Diploma thesis deals with the issue of active and semi-active damping and its possible applications in the context of vehicles. The beginning of the document is focused on the actual state, major applications and patents in the field. As each of the individual ways of usage is relatively specific, the next part is aimed particularly at the damping unit of bicycle. Given the choice, real measurements and simulations were made in order to verify the applicability of such a device in practice.

This thesis deals with comprehensive study and design of recovery system of a road vehicle powered by human power. It contains an overview of different types of heat recovery devices, their characteristics, advantages, disadvantages and applicability in the construction of such a vehicle.

Diploma work named Selected measurements of motion of bicycles starts with history and development of bicycle. There are components of bicycles described and analysis accidents with cyclist. There is a goal organise and realize measurement of ride in the curve and tranverse movement. The outputs are going to be use by experts in sphere of transport accident analysis. There will be exists data analysis then starts maeasurement. After then compile sources from measurement – break testing, ride in the curve testing and tranverse movement on the most frequently road surfaces with part of enaugh cyclist and bycicles. The end of work is already existing data with hold of measurement data comparison.

In this thesis entitled ,,Analysis of motion of the bicycle when riding in a straight line”, I deal with the history of the bicycle, classifications and descriptions of the various parts of the bicycle and the analysis of accidents. The main objective is to analyze the movement of cyclists (bicycle) in a straight line in the implementation of tasks, typical for him - pedaling, showing a change in direction, or looking back for him. In conclusion evaluation, which can then be used in the processing of judicial opinions by experts.

Digitalization is an important theme in Informatics research. Especially in today's digital society, people cannot live without the help of information technologies. The purpose of the study was to explore how the digitization process happened in the bicycle industry. The study was based on the background of bicycle-sharing system in Beijing and a qualitative methodology was followed. The findings show how bicycle-sharing system evolve step by step by applying advanced digital technologies. In the coming 5G era, organizations need to reconsider the situation of bicycle-sharing system and this research may give some references.

A conventional bicycle is a stable system given adequate forward velocity. However, the velocity region of stability is limited and depends on the geometric parameters of the bicycle. An autonomous bicycle is just not about maintaining the balance but also controlling where the bicycle is heading. Following paths has been accomplished with bicycles and motorcycles in simulation for a while. Car-like vehicles have followed paths in the real world but few bicycles or motorcycles have done so. The goal of this work is to follow a planned path using a physical bicycle without overcoming the dynamic limitations of the bicycle. Using an iterative design process, controllers for direction and position are developed and improved. Kinematic models are also compared in their ability to simulate the bicycle movement and how controllers in simulation translate to outdoors driving. The result shows that the bicycle can follow a turning path on a residential road without human interaction and that some simulation behaviours do not translate to the real world.

Syftet är att studera hur det planeras för cykel i staden och hur cyklande kan bli ett merattraktivt alternativ för stadens invånare. Detta gjordes med fokus på Karlstad, men ocksågenom lärdomar från andra exempel. Studien uppnådde sitt syfte med hjälp av de tvåfrågeställningarna Hur planeras det för ökat cyklande i Karlstad kommun idag? samt Vilkenpotential finns att öka andelen cyklande i kommunen?Som verktyg för att besvara frågeställningarna används de fyra teoretiska begreppen hållbarmobilitet, jämställd planering, trygghet samt radikala lösningar. Studien har en kvalitativmetod i form av semistrukturerade intervjuer. Intervjuerna sker med sju invånare i Karlstadskommun där kravet för att intervjuas är att äga en cykel och använda den allt från någon gångper år till flera gånger i veckan, samt med tre tjänstepersoner på Karlstads kommun.Resultatet visar att de tillfrågade invånarna har en blandad uppfattning omcykelmöjligheterna i Karlstad. Vissa anser att det duger som det är, men om de får önskafinns ändå förbättringspotential, andra anser att de behöver bättre förutsättningar för att väljacykeln i större utsträckning än de gör i nuläget.Slutsatsen visar på att det idag planeras för attraktiva cykelbanor genom att ha trygghet iåtanke. Det görs främst i samband med ombyggnation eller nybyggnation av områden. För attbidra till ökat cyklande har de stort fokus på snöröjningen under vinterhalvåret. Slutsatsenvisar även att Karlstad kan öka cyklandet genom förbättrad cykelinfrastruktur och mermarkeringar och skyltar. Cyklandet kan även öka med hjälp av vissa radikala lösningar somuppvärmda cykelbanor, skyddade cykelbanor och cykelhiss.

We consider first the single-track bicycle model and state relations between the tires’ lateral forces and the turning radius. From the tire model, a relation between the lateral forces and slip angles is obtained. The extra rolling resistance forces from cornering are by linear approximation obtained as a function of the slip angles. The bicycle model is validated against the Magic-formula tire model from Adams. The bicycle model is then applied on an optimization problem, where the optimal velocity for a track for some given test cases is determined such that the energy loss is as small as possible. Results are presented for how much fuel it is possible to save by driving with optimal velocity compared to fix average velocity. The optimization problem is applied to a specific laden truck. / Vi betraktar först den enspåriga cykelmodellen och ställer upp samband mellan däckens sidokrafter och kurvradien. Genom däcksmodellen fås ett samband för hur sidokrafterna beror av slipvinklarna. De extra rullmotståndskrafterna för kurvor fås via linjär approximation som funktion av slipvinklarna. Cykelmodellen valideras mot en däcksmodell från Adams. Cykelmodellen tillämpas sedan på ett optimeringsproblem där den optimala hastigheten längs en bana för några givna testfall bestäms så att energiförlusten blir så liten som möjligt. Resultat presenteras för hur mycket bränsle det är möjligt att spara genom att köra med optimal hastighet jämfört med fix medelhastighet. Optimeringsproblemet tillämpas på en specifik lastad lastbil.

Bicycle-sharing programs are a new trend in urban transportation. The main difference of a bicycle-sharing program with a regular bicycle rental is that is possible to get a bicycle in one station and return it in any other station. There are many models of bicycle sharing, each model with its pros and cons. This study analyzes the bicycle-sharing models in order to build a proposal of a bicycle-sharing program suitable for Brazilian median cities. The study begins with an overview of bicycle transportation, followed by the analysis of different bicycle-sharing programs. The last chapter formulates a proposal of a bicycle-sharing program suitable for Brazilian median cities. This study uses both quantitative and qualitative methods. The analysis includes a case study on the bicycle-sharing program in Stockholm. This case study is based on interviews with the manager of the program in the company in charge, and with the responsible official in Stockholm municipality. A questionnaire was moreover handed out to users of the program. This case study is complemented with a questionnaire sent by email to managers of bicycle-sharing programs in some cities around the world, this in order to provide more examples on how bicycle sharing can be organized. Finally, another case study was carried out in a Brazilian median city in order to evaluate the local awareness concerning bicycle transport, and the possibility of implementing a bicycle-sharing program there. A questionnaire was handed out to a sample of the local population and an interview was made with the local transport authority. The analysis of all data results in a proposal for a bicycle-sharing program suitable for the Brazilian context. The proposal comprises the choices of bicycles, stations, equipment related to the hiring process and service vehicle. It includes a complete financial appraisal with the necessary capital for implementing and managing the program. It shows that it is possible to build an affordable bicycle-sharing program adapted to Brazilian median cities. The program will create job opportunities and can contribute to a changed view of bicycle transportation in these cities. The proposal could also be applied in countries with the same characteristics as Brazil.

Title: Wheel size selection preferences in recreational and active cyclists Goals: The goal of the thesis is to find relation between anthropometric and training indicators and selection of bicycle wheel size. Methods: The work is a descriptive study of a sample of randomly picked men and women. The research sample consisted of 250 respondents of the age range 13 - 77, with 106 women and 144 men. The research has been carried out in the form of semi structured website survey. The data have been categorized and analysed using basic statistical methods and the results were interpreted in the charts by the frequency of answers. Results: By analysing the survey results we have found the existing relation between the used wheel size and anthropometric and training indicators. With the growing height and weight of the respondents, the tendency to use 29" wheel size increases, as mentioned 81 respondents in height range 160-199 cm. The research has also shown that older riders use their bikes primarily to the cycling tours and that with the smaller wheel size. The size 29" use only eighteen respondents of the age range 40 - 77. The comparison of training indicators with the used wheel size has proven direct relation between effortfulness of the surface and used wheel size, when 2500 km and more will be...