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Excitation device of the physical axle model
Zeman, Petr ; Čížek, Petr (referee) ; Mazůrek, Ivan (advisor)
The main objective of this thesis was to design an excitation device for a full-axle test station for the simulation of a crossing test over bump, used to verify the springing and damping properties of passenger car wheel suspensions. The motivation for the development of the excitation device of the all-axle station was the need to test the properties of the suspension elements in a real scale, and to add a new form of excitation for the axle model that is built in the laboratory of the IMD FME. Until now, this had only one excitation option, a vibration resonator. Firstly, a virtual dynamic axle model was created by crossing an obstacle in Matlab Simulink, which was mainly used to determine the force load exerted by the simulator. The proposed device is divided into a weighing arm and a drive unit. Using the designed device, the obstacle crossing can be simulated with a height of up to 5 cm at a speed of up to 30 km/h and an axle weight of up to 800 kg. The device also records the force exerted from the wheel to the pad throughout and after the excitation. The developed device meets the specified space and modal behaviour requirements, which does not interfere with the force measurement process. The device operates by forcing a cylindrical barrier under the axle wheel and, in conjunction with an existing axle model, forms a crossover test simulator that will be used for the development and experimental verification of automotive suspension components, such as MR dampers in particular.
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Study of designs of forwarders and timber trailers in logging
Svoboda, Dominik ; Pokorný, Přemysl (referee) ; Mergl, Václav (advisor)
This bachelor thesis deals with the construction of forwarders and timber trailers in forestry logging. The thesis is divided into three parts. The first part describes the structural solutions of forwarders. The second part covers the construction of timber trailers. The last chapter focuses on the utilization of forwarders and timber trailers in forestry logging, their advantages, disadvantages, and a comparison of technical parameters. The study includes schematic drawings of certain structural components.
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Vehicle Axles with Electric Drive
Hlaváč, Petr ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
The aim of the bachelor’s thesis is to compile an overview of the known solution for front and rear axles and characterizes development trends. The first part describes existing suspension, comparison, theoretical description of individual axle components, methods of attachment to the car body and their advantages or disadvantages. In the following section attention is focused to the drivetrain. Electric motors, by their compactness, change the established drive layout typical for internal combustion engine cars. The final part is dedicated to the comparison of the vehicles with electric drive and similar cars with internal combustion engine. Based on he gained knowledge the future development of electric vehicle axles is outlined.
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The Axles of SxS Vehicles
Štolpa, Radek ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
The diploma thesis deals primarily with the topic of the kinematics of the wheel suspension that has a significant effect on the dynamics of the whole vehicle. The thesis gives a general overview of kinematic characteristics and their impact on driving characteristics. It deals with load transfers that occur due to lateral and longitudinal accelerations. The thesis analyses the axles of the SxS vehicle, which has wheel strokes up to 600 mm. The axles have high requirements for changes in kinematic characteristics. The thesis provides an overview of the used axles and then compares them with the original ones. The thesis contains its design of axles with the procedure and evaluation of differences compared to the other axles specified by the boundary conditions. An algorithm using analytical geometry was also created where instant centre positions, roll centres and anti-characteristics for the static position of the vehicle can be calculated. In conclusion, it contains a sensitivity analysis, which aims to acquaint with the effects of kinematic connections of double wishbone suspensions on the kinematic characteristics.
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Rig for Testing Suspension Components
Nedoma, David ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
Development of car suspensions needs optimalisation of comfort, durability over external conditions, reduction of un-sprung mass, car handling. This requirements often need contradictory solutions and during solving it is necessary to take compromises. Verification of durability of car suspension is better while developing the whole car. Therefore, many solutions of car suspension test rigs are created. This thesis brings summary of existing solutions and their construction. This thesis brings its own solution of the suspended test equipment, strength calculations of main components. You can find here procedure of testing components on this test rig as well. Written ideas for future development of this rig are mentioned in last chapter
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Physical axle model for dynamic tests
Bělunek, Matěj ; Dočkal, Aleš (referee) ; Mazůrek, Ivan (advisor)
The aim of this thesis is the design of a physical axle test station, along with a virtual dynamic model, with the purpose of vehicle suspension tests. The axle, or half-car, model is the answer to the inaccuracies of the most widely utilized suspension model, and the high cost of the full vehicle testing. The motivation for the new test station and its virtual model is the prospect of accurate, quick and effortless testing and optimization of the vehicle suspension characteristics. The existing solutions in most cases substitute actual suspension elements (axle) and wheels with auxiliary parts leading to a departure from reality. The design of the new test station is based on the analysis of current physical model solutions and in accordance with set requirements. The tester substitutes the vehicle Škoda Fabia I Hatchback and utilizes its actual rear axle including suspension elements. The assembled rig, or rather its functionality, is successfully experimentally verified. The created virtual dynamic model, using ADAMS software, is identified against the designed test station, while the obtained simulation results are compared with the experiment data. Meeting the experiment predictions and virtual model results validates the tester’s ability to sufficiently reflect real car suspension behaviour and it is ready for further vehicle spring and damping properties testing.
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Two-axle trailer for a truck
Novotný, Tomáš ; Pokorný, Přemysl (referee) ; Zeizinger, Lukáš (advisor)
This bachelor thesis deals with the conceptual design of a two-axle trailer for a truck. The first part contains a research analysis of trailers and subsequent legislation. In the next part is in detail analyzed construction of the trailer concept and then the calculation of the axle loads. The last part consists of strength analysis with its evaluation and partial drawing documentation.
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Iron hand in a velvet glove
Briestenská, Monika ; Hýlová, Adéla (referee) ; Mléčka, Jan (advisor)
Annotation What is a prison? What is its meaning or role? What does prison mean in the context of architecture? How did prisons develop and how did these changes relate to the development of society? And should prisons not exist at all? Prison is a very controversial topic, but it still affects the lives of many people. Former convicts face prejudice and social barriers and often relapse, which we should try to prevent. The work discusses the relationship of architecture to the correction and reintegration of convicts. The architecture of the prison should respond to the tendencies that have proved effective, follow them and together with them form the most effective correctional facility. It can be seen that the course of prison designing is moving towards a more open, smaller and more friendly space. Correctional programs in open prisons work with convicts on the basis of contact with the outside world, reintegration, through work, retraining and educational programs, where architecture has a significant impact, as it maximizes the chances of convicts to be rehabilitated and is inscribed into their lives. During the work on this project, a proposal for an open prison in Olomouc was created, which considers the stages of the correction of convicts and reflects the routine of everyday life outside prison. It uses movement to break the monotony of prisoners' recurring days.
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Beginnings of the modern prison in the Czech lands in the 1st third of the 19th century: Punishment, prison, prisoner
Mitáčková, Renáta ; Himl, Pavel (advisor) ; Olšáková, Doubravka (referee)
This thesis deals with the origins of the modern prison system in czech lands at the first third of the 19th century. At first, the theoretical part of the thesis presents the opinions of the authors of existing literature. Afterthen it concentrates at the most famous reformers of criminal law and prison system. In the end it describes the criminal justice system and prison in Habsburg Monarchy. Practical part of the thesis is divided into three parts - punishment, prison and prisoner. The first part deals with the concept of the punishment and its purpose. It presents and analyzes crimes and punishments. The second part is focused on the prison and its functions. Was the purpose of the prison to punish or also to correct the prisoner? Which instruments served to correction of the prisoner? The thesis also compares the functioning of the prison and the other institution of detention - the workhouse. The last part is searching for the answers on this questions: How should the prison act on the prisoner's soul and body? What part did the punishments play within the prison and how should they be realized? The aim of the thesis is to try to capture, how did the new concepts of imprisonment show in the praxis of prison and how they act on organization of prison. Key words: punishment, prison, prisoner,...
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Romany children education in Czech school system and its realization in Náchod
Vajsar, Jan ; Wildová, Radka (advisor) ; Mazáčová, Nataša (referee)
TITLE: Romany children education in Czech school system and its realization in Náchod AUTHOR: Jan Vajsar DEPRATMENT: Primary Education Department SUPERVISOR: prof. PaedDr. Radka Wildová, CSc. ABSTRACT This dissertation is a proposal of a strategical model for romany`s pupils education in Czech school system. This dissertation is conceived for primary and lower secondary schools teachers. Our goal was to make a model of the work with romany pupils which could be applied with some modifications for any basic schools where romany pupils are educated. It has been located to Náchod. It is a town where the current situation in education can be used as a good example for the similar educational problems we can observe in other towns of the Czech Republic. The dissertation includes many methodical suggestions which are designed for simple and useful practicing at schools. These suggestions should be used in order to solve various problems teachers still have and will probably have with Romany pupils. KEYWORDS: Romany, child, education, model, pupil, environment, approach, teacher, street, family, co-operation, mistrust, preconceptions, rectification, change
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