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Design of semiactive suspension for mountain terrain bike
Mráz, Kryštof ; Kubík, Michal (referee) ; Strecker, Zbyněk (advisor)
This Bachelor Thesis is focused to design semiactive suspension of mountain bike using MR damper. In research part of thesis is summarised knowledge about passive and semiactive suspension of mountain bikes and about MR dampers. Behaviour of suspended front fork was simulated using virtual dynamic model which was created in graphic environment MATLAB Simulink. Semiactive algorithms Skyhook and modified Groundhook and for comparison also passive settings are simulated. According to results of these simulations is designed semiactive suspension with MR damper which has effect to stabilising contact force of front wheel and therefore increases safety of rider.
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Suspension Systems of Commercial Vehicles
Němeček, Vojtěch ; Dlugoš, Jozef (referee) ; Fojtášek, Jan (advisor)
This thesis follows up suspensions of lorry types. Thesis contains comprehensive overview of all commonly manufactured springs and shock-absorbers. Thesis is divides into five main parts. The first chapter is about oscillations, quality of suspensions and about other points connected to this theory. The second chapter has detailed overview of main types of suspensions. All types of currently used suspensions are listed, including coil suspensions, leaf suspensions, air suspensions and also shock-absorbers. The third chapter combine suspensions on different types of axles with their structure. The fourth chapter contains future of suspensions and electronic systems. In the conclusion is mentioned subjective evaluation of different types of vehicles
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Design of Data Acquisition Equipment IMC Fastening System in the Car
Černý, Martin ; Jeník, Radomír (referee) ; Ramík, Pavel (advisor)
Devices for measuring the dynamic load and vibration of certain parts of the bodywork or parts of other parts of the vehicle are made using accelerometers and measuring instruments IMC. It must be simply installed into the interior of the vehicle so that it is not necessary to remove any parts of the interior and to avoid damage to all parts of the interior. The preparation must also withstand the considerable dynamic load generated by the harder operation tests.
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Oscillation and wave experiments for Practical Course in School Experiments I
Řehůřek, Michal ; Mandíková, Dana (advisor) ; Koudelková, Věra (referee)
In our thesis we focused on demonstrational-experiment-projections and instructions for mechanical oscillations, waves and acoustics. Nevertheless, we did not marginalize other types of tasks linked to experiments. As a starting point of our thesis we used a search of our topic carried out on textbooks for elementary and high schools. This search forms a part of introduction of our thesis. We carried out a considerable part of presented experiments personally during lessons with our students and distilled new experience into the final guidelines of presented experiments. Attachment plays a significant part of the thesis, above all video records of experiments and woorksheets for students. Experiments, with instructions included, update and supplement the subject Practical Course in School Experiments I, which forms part of the compulsory professional preparation of physics teachers at MFF UK. The experiments might therefore serve as an inspiration both for current and future physics teachers. They are synoptically presented in an online Collection of Physics Experiments (fyzikalnipokusy.cz/en).
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Pendulum excitation
Vrána, Jiří ; Březina, Lukáš (referee) ; Hadaš, Zdeněk (advisor)
This thesis is focused on creating a model situation of excited pendulum with one degree of freedom that oscillates in both linear and nonlinear condition. The theoretical part describes several basic concepts of oscillation theory and states some examples of pendulum applicability. The practical part consists assembling of motion equations of model situations, based on which simulations programs are created. The thesis contains also concept of practical use of the nonlinear pendulum model.
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Use of Vibrodiagnostics in Forensic Engineering
Záleská, Veronika ; Bradáč, Albert (referee) ; Panáček, Vladimír (advisor)
This thesis deals with the measurement and evaluation of vibration on selected parts of car. Part of the work is devoted to the theory of vibration and noise, which includes, among others, presentations of common disorders of machine parts in terms of vibration. In the practical part of the work were performed out measurements described here and the results analyzed. Last part is in short devoted to the possibilities of using a similar measurement in forensic engineering.
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Solution of Powertrain Vibration on Dynamometer
Lux, Josef ; Janoušek, Michal (referee) ; Novotný, Pavel (advisor)
This diploma thesis deals with vibration of powetrain on dynamometer. For this problem I got six-cylinder engine, which is connected by flexible coupling to dynamometer. According to simplified computational model is this assembly simulated in MBS of system ADAMS View. Two versions of flexible coupling are dealt. In the final part of the thesis is created single program for calculation self-frequency of this assembly and in the end of this thesis is general evaluation.
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Powertrain Vibration Solution using Computational Modelling
Zubík, Martin ; Prokop, Aleš (referee) ; Novotný, Pavel (advisor)
The thesis solves vibration of simple combustion engine model as a basic step for evaluating the noise of engine. On the basis of computational model realized in software MBS ADAMS, which contains all significant input parameters, there are found normal velocities of the one cylinder four stroke engine block surfaces. The outputs are then processed into the integral characteristics that define the level of possible emissions for whole acoustic spectre. Two variants of the engine block were solved and in the end the summary of solution approach was made.
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Crankshaft Design of Aircraft Engine
Luka, Jan ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The main aim of this thesis is to design the cranckshaft for aircraft diesel engine with ordered basic parameters. The engine is flat with four-cylinder and opposed pistons. The thesis is focused on balancing of centrifugal and reciprocating forces and their moments, conceptual design of crankshaft and its stress calculation. The thesis is describing calculation of torsional vibrations as well.
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