The content of the thesis is a change in the design of the valvetrain of produced petrol engine. The engine for modifications is choosen by the author of the thesis. The main activity is changing the valve lift curve and change of the engine timing. The thesis contains design of valve springs. The work deals with the possibilities of increasing the performance of the petrol engine.

The main goal of this work is to provide a composite alternative to an already existing beam which has omega cross section. The main part of this work is focused on using the finite element method to solve and optimize the problem. Firstly, a duralumin version will be used to calibrate the computation, then the problem will be solved for different options of slightly adjusted geometry. The computation itself will include general static analysis as well as analysis of buckling.

Presented work deals with wear of intramedullary milling cutters for the drilling of nail holes used for osteosynthesis of lower limbs long bones. After the physician's complaints about the increasing resistance and total change of its properties that are caused by the reuse the instrument, we have designed a suitable methodology to verify and quantify this problem. The experiment was carried out on three types of milling cutters, differing in their diameter. For comparison, we performed the experiment in two cycles, before (new instrument) and after wear (milling 100 holes to a depth of about 2 cm). Pressure force and torque were recorded during milling process. Then, using statistical methods, we evaluated the statistical significance of the differences. In most cases, the wear significantly increased the pressure force and torque.

In airplane constructions is a favor for using lightweight materials such as titan, composite or aluminum alloys. Main difference of replacing a homogenous material with a composite is a difficulty of stiffness and strength analysis. Composite materials have much bigger potential because of complex analysis and exact dimensioning for given load. Analyzed bracket are connecting keel beam of an airplane to ribs with tension bolts. Mainly due to the manufacturing costs composites are replacing the titan version of bracket. Two examples of composite bracets were analyzed - one with exact same dimensions as Ti version (which was analyzed also) and the other one with differently shaped profile. These two profiles are made from carbon reinforced polyphenylene sulfide resin (C/PPS). All analysis were done in FEM commercial software Abaqus.

This paper deals with design of laboratory model of an active radial magnetic bearing, which is being developed in a student grant competition. The main design issue was positioning and attachment of optical displacement sensors of the shaft. Design consisting of two separate modules, one containing the sensors and the other containing electromagnets was developed. The goal of this project is to develop complex operational model, which will eventually be utilized for application combining electric motor with active magnetic bearings.

The aim of this project is a design and assembly of the optical sorting machine for use as a member of a sorting test rig for analysis of output of oil seeds hulling machines. The machine should have smaller dimensions and cost than its industry counterparts. The machine works on the principle of guiding a carriage trough a contoured groove using a linear actuator. The control is realized by a Teensy board.

This diploma thesis deals with optimization of the active positioning unit for workpiece automatic levelling. The unit is used for levelling of a workpiece in workspace of machine tool and works in automatic mode. It leads to reducing time-demanding manual setting. But nowadays capacity of the unit limits its application. The main disadvantages are low lifting capacity and requirement of supply of a high pressure hydraulic fluid. The goal of this thesis is to prepare a case study for increase a utility value of the unit.

This article deals with the creation of glasses for the use of extended reality. This glass is designed as an aid for people with a hearing impairment, take the surrounding sounds and convert them into a virtual picture. We describe basic requirements for construction and display principle with the analysis of manufacturing tolerances. The next parameters are good ergonomics, comfortable for using and weight of aid. On the basis of this requirement we describe manufacturing technology and the construction itself. The last chapter are FEM calculations, which are simulating condition during common using.

Článek se zabývá dynamikou Segnerova kola. V první části je uveden postup užitý při výrobě kola, a to použití jednoduchých dílů a jejich spojením a technologie 3D tisku. Následuje odvození rovnice pro stanovení úhlových otáček a aplikování tohoto vztahu na dva různé případy provozu. Proudění je uvažováno jako jednorozměrné.

Tato práce obsahuje výpočty vybraných parametrů letu badmintonového míčku, popis funkce a konstrukce badmintonového nastřelovacího stroje. V této práci jsou vypočítány tyto veličiny: polodráha letu, poločas letu, výška svislého výstřelu směrem vzhůru a asymptotická rychlost letu badmintonového míčku. U výpočtů jsou uvedeny všechny potřebné vzorce, jejich odvození i popsání. Kvůli tvaru badmintonového míčku je zvláštní i konstrukce badmintonového nastřelovacího stroje. V této práci jsou zde popsány oba hlavní mechanismy stroje, a to podávací a odpalovací. U podávacího mechanismu je zajímavé jeho provedení, které je i předmětem patentového řízení. Stroj je navržen tak, aby vystřelil míček rychlostí 100 km/h.

The thesis focuses on quasi-static load analysis of the drive wheelset of the high-powered electric locomotives, on the design of the press fit of the hub wheel on the drive wheelset axle. Physical factors, which occur in higher speeds of locomotives are also included in this design. Moreover, the analytical stress analysis of the designed press fit is done in this paper and the results are compared with the finite element method calculation.