This diploma thesis deals with FEM analysis and optimization of carriage for top drive system of drilling rig Bentec 350 AC and it is defined as a development contract for company MND Drilling & Services a.s. Intensive drilling leads to damages and repeated occurrence of fatigue cracks on carriage especially along edges of welded ribs in their heat-affected zone. The aim of this thesis is to draft construction improvements of carriage which leads to elimination of damages. Realization of this modifications depends on correct definition of boundary conditions, analysis of damage occurrence as well as verification of carriage drafts with finite element method.

This diploma thesis is focused on the design of the driving mechanism of Stirling engine, where was chosen modification of these engines with rhombic drive. Subsequently is constructed kinematical, dynamical and thermomechanical mathematical model. Finally, is going from these models for execution strength control and drawing documentation.

This master’s thesis is deal with the design of the tractor’s front axle drive to enlarge its braking efficiency of the standing tractor fixed by the parking brake. In the first two chapters, the basic information related to the above stated issue is being summarized. Next, procedure of creating the design including the fundamental calculation proposal is being described. In the last chapter, the strain-stress analysis of the selected partial sections of the design is being presented. The final design is supported with the drawing documentation that is being part of this master’s thesis, too.

Final thesis on the design of the drive of a cutting mechanical two-point crank press with a nominal force of 6300 kN. After the theoretical definition of the area of mechanical crank presses and their drives at the beginning of the work, the actual design solution follows. The main idea of the design is the drive arrangement with the concurrent axis of the clutch shaft. The supplied torque is distributed on two longitudinally mounted drive units via a two-sided bevel gear. Solution of the construction design is aimed at enabling workspace variability while simultaneously unifying the maximum number of drive components. Drawing documentation of selected components and assemblies is the part of the thesis.

Táto práca sa zaoberá problematikou škodlivého kódu na webe so zameraním na analýzu a detekciu škodlivého JavaScriptu umiestneného na strane klienta s využitím strojového učenia. Navrhnutý prístup využíva známe i nové pozorovania s ohľadom na rozdiely medzi škodlivými a legitímnymi vzorkami. Tento prístup má potenciál detekovať nové exploity i zero-day útoky. Systém pre takúto detekciu bol implementovaný a využíva modely strojového učenia. Výkon modelov bol evaluovaný pomocou F1-skóre na základe niekoľkých experimentov. Použitie rozhodovacích stromov sa podľa experimentov ukázalo ako najefektívnejšia možnosť. Najefektívnejším modelom sa ukázal byť Adaboost klasifikátor s dosiahnutým F1-skóre až 99.16 %. Tento model pracoval s 200 inštanciami randomizovaného rozhodovacieho stromu založeného na algoritme Extra-Trees. Viacvrstvový perceptrón bol druhým najlepším modelom s dosiahnutým F1-skóre 97.94 %.

This thesis deals with mechanical design of tool turret for CNC lathe. The first part of the thesis is dedicated to research of automatic tool exchange and current trends in design of tool turrets with drive of rotary tools. The second part is focused to design of tool turret, which is based on the findings of the research part of the thesis. The design includes calculations of machining loads, spindle deformation, bearings, gears and spindle startup. Furthermore, 3D models and selected drawings are included.

This diploma thesis deals with the design the drive of the feed coordinate portal machining center using a gear rack and pinion. The thesis contains researches from the area of CNC machining centers for non-rotating parts and sliding linear systems. Market analysis of portal machining centers of type of lower gantry with a gear rack and pinion was done. Furthermore, several design variants are proposed in terms of positioning the drive on the machine. These variants were further compared and the best option was selected for the specified machine. Subsequently, the technical calculation of the drive is performed and individual parameters and structural elements are proposed. The thesis also includes a 3D model of the proposed variant and the required drawing documentation.

The diploma thesis deals with the design of rotary manipulator for positioning weldments, which could be 5000 mm long and weight 500 kg. The beginning of the thesis presents the research of welding manipulators which could be founded on the market. Three variants of the positioner are proposed in the next section. The resulting variant is optimized using strength analysis in ANSYS software. Furthermore, two variants of drive, by hand drive or electric motor, are presented. The manipulator is interconnected in a single part using a designed frame constructure. Critical points of the manipulator are checked by strength calculation. The final part contains the risk analysis of the proposed manipulator.

This diploma thesis focuses on Lycoming drive unit mounting used in two-seater plane of VLA category (the very light aircraft). In the beginning characteristics of currently produced Bristell aircrafts are described. Following chapters aim at research selection of new drive unit mounting based on multi-criteria decision analysis. For selected unit, the weight, center of mass and flight performance are calculated. Additionally, the construction of engine mount is proposed. According to CS-VLA and CS-23 stress level of mounting is defined followed by strength verification. Later in this thesis, a suitable engine cover for engine and cockpit cooling is proposed. A complete fuel system is described in following chapter. Last chapter deals with financial costs of re-engining as well as aircraft operational costs.

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