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Balancing Shafts Support Optimalization for Zetor 4V UŘ III Engine
Zemčík, Tomáš ; Franz, Rudolf (referee) ; Rauscher, Jaroslav (advisor)
To make a check of an contemporary balancing verification of diesel engine Zetor UŘ III with type identification 1505, the engine power 90 kW and especially friction bearing design, which could replace existing needle bearing HK 4520 type, is the aim of this diploma thesis. Bearing type modification requires constructional adjustment of engine block and balancing shaft and therefore this proposal for construction another aim in my diploma thesis. The last part of my diploma thesis is an economic balance original imposition against newly designed. Calculations are made using mathematical software MathCad, the balancing shaft is made using ProEngineer software and control calculations of bearing stresses are made with ADAMS and FEM of ANSYS system. Motivation to write this work is to prove the possibility how to decrease manufacturing costs of ZETOR TRACTORS a.s. company.
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Kinematic analysis of children's gait
Kernerová, Helena ; Vilímek, Miloslav (advisor) ; Horák, Zdeněk (referee)
Title: Children's gait characteristics and kinematic analysis Objectives: The aim of the master thesis is to perform an analysis of the gait of children engaged in intensive sports training (floorball) and children who are not intensively engaged in sports, and to compare selected spatio-temporal, kinetic and kinematic parameters of these two groups. Methods: The work has a theoretical-empirical nature with a smaller number of probands. 3D kinematic analysis of gait was recorded with a Qualisys device and reaction forces from the pad with 7 Kistler force plates. The following parameters are monitored in the thesis: step length, step speed depending on height, range of plantar and dorsiflexion in the ankle joint, rotation of the pelvis and shoulders in the transverse plane, vertical and anterior-posterior component of reaction forces from the ground. Results: The results of the study showed that for some kinematic parameters, intensive sports training of children aged 7-13 years leads to changes in the behavior of individual analyzed parameters. This is mainly due to the fact that the tested group has more symmetrical rotation of the pelvis and shoulders in the transverse plane compared to the control group. However, the results obtained in terms of statistical probability are not sufficiently...
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Gait analysis of female basketball players
Deličová, Tereza ; Vilímek, Miloslav (advisor) ; Horák, Zdeněk (referee)
Title: Gait analysis of female basketball players Objectives: The main objective of this thesis is to perform gait analysis using Qualisys and Kistler systems in long time female basketball players and population that does not engage in any regular sports activity on competitive level. Selected spatiotemporal, kinematic and kinetic gait parameters are compared between measured groups. Methods: 20 female probands participated in this experimental study. Tested group consists of 10 long time female basketball players between ages of 21 and 29 (mean age of 24,5). Control group consists of 10 female probands between ages of 24 and 25 (mean age of 24,5) that do not engage in any competitive sport on regular basis. Qualisys Motion Capture system was used to gather 3D kinematic gait data. Ground reaction forces were measured by using Kistler force plates. Data was obtained by both systems at the same time. Evaluated gait parameters were walking speed, step length, pelvic and shoulder rotation range of motion in transversal plane, CG of foot range of motion and all ground reaction forces components. Two-sample t-test and Mann-Whitney U test with significance level of 0,05 were used for statistical analysis of obtained data. Results: Results of this study demonstrate that long time engagement in...
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The objectivization of evaluation of the dynamics of self-defense instruments
Beránek, Václav ; Šťastný, Petr (advisor) ; Pavlů, Dagmar (referee) ; Reguli, Zdenko (referee)
Title: The objectivization of evaluation of the dynamics of self-defense instruments Introduction: Strikes by the upper limb are key tools for the self-defense system. So far, mechanical properties have not been evaluated for a wider group of strikes without protective equipment with applications in training, injury risk assessment, forensic biomechanics and medical law. Objectives: The aim of this work is to compile and objectify the evaluation of the dynamics of a wider group of strikes by the upper limb by specifying the size of the contact area and describing the damping properties of the foam of the detection apparatus. The aim is to evaluate the impact force, the probability of exceeding the bone tissue fracture threshold, the impulse, the size of the impact surfaces and the pressure for three impact techniques, both sexes and two experience levels. Methods: The work consists of three projects. Two quasi-experiments were completed by 169 probands, men and women, experience levels beginner, advanced (n = 169, height 177.8±9.0; weight 81.6±17.8; age 27.3±8.1) within one period. Probands were measured on two devices (Kistler, Podokam), where the time, impact force of the blow was recorded and three segments of the upper limb were photographed. Probands performed 3 striking techniques, a total of...
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The influence of hallux on stand and gait stability
Hlinková, Zuzana ; Valouchová, Petra (advisor) ; Bitnar, Petr (referee)
The diploma thesis "Vliv palce nohy na stabilitu stoje a chůze" is focused on the function of hallux at stance and through the gait cycle and particularly to halluxes influence on stability of the stated motor stereotypes. The theoretical part summarizes the knowledge gained through literature research on anatomy and kinesiology of hallux. It also contains analysis of gait cycle and muscle coordination through it with emphasis upon activity of foot and function of hallux muscles. The practical part attempts to objectivize changes in stability and changes of loading of foot with instrumental examination. Force plate Balance Master® and GaitPlatform FDM were used for the measurements. On the force plate the parametres of movement of the centre of mass (COM, COG) and maintenance of stability while standing were compared. GaitPlatform® was used for measurement of ground reaction forces while standing and walking. Powered by TCPDF (www.tcpdf.org)
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Balancing Shafts Support Optimalization for Zetor 4V UŘ III Engine
Zemčík, Tomáš ; Franz, Rudolf (referee) ; Rauscher, Jaroslav (advisor)
To make a check of an contemporary balancing verification of diesel engine Zetor UŘ III with type identification 1505, the engine power 90 kW and especially friction bearing design, which could replace existing needle bearing HK 4520 type, is the aim of this diploma thesis. Bearing type modification requires constructional adjustment of engine block and balancing shaft and therefore this proposal for construction another aim in my diploma thesis. The last part of my diploma thesis is an economic balance original imposition against newly designed. Calculations are made using mathematical software MathCad, the balancing shaft is made using ProEngineer software and control calculations of bearing stresses are made with ADAMS and FEM of ANSYS system. Motivation to write this work is to prove the possibility how to decrease manufacturing costs of ZETOR TRACTORS a.s. company.
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