The theme of this thesis is the design and optimization of algorithms for controlling stepper motors with feedback by measuring the BEMF. The emphasis was on self-management stepper motor current depending on the load. To verify the algorithm was designed and built sample devices with integrated circuit NCV70514 from ON Semiconductor. The result is a sample device, the control program and algorithm to control a stepper motor.

Purpose of this master´s thesis is the construction proposal of azimuth fork mount with load capacity to 20kg including both axes drives. The solution contains design options of azimuth fork mount, calculations, design proposal of the mount and drawings of the shaft, fork and the assembly.

The goal of this thesis is design of universal system for motor control. This device must be able to control at least 4 motors, stepper motors or DC motors. Wired, or wireless communication, using IEEE 802.15.4, is mandatory. The System is based on modular concept. The Basic modules are Control module, Communication module, Connection module and Power module. The system was tested in the control of fertilizer dosing pumps in the greenhouse

The aim of this diploma thesis is revenue recognition in the financial statements of companies prepared in accordance with the rules of International Financial Reporting Standards (IFRS) in the light of current changes. The work is specifically focused on long-term construction contracts and its goal is assess the difference outgoing (IAS 11) and the incoming (IFRS 15) revenue regulation and the subsequent impact to the financial statements of companies. After a theoretical analysis of the relevant standards, work deals with the analysis of specific construction contract and continuously arising circumstances. The analysis also outlines the application of the new revenue recognition model. Ultimately, thesis deduces the difficulties of the implementation process of the new standard in companies. The results show that the upcoming adjustment of revenue recognition may not bring significant changes to the specific numerical values, rather as a completely new view of revenue recognition.

Title: Coordination changes in a selected remote part of the locomotor system when walking in straight shoes and high heels. Objective: The aim of the dissertation is to find out how walking on a high heel affects the coordination changes and timing of the beginning of muscle activation in a selected part of the musculoskeletal system in comparison with walking in shoes with straight soles. Methods: This research work has an empirical, comparative intra-individual character. Comparative analysis of coordination characteristics of the locomotor system with the experimental character of obtaining quantitative data. We used a portable electromyograph BIOMONITOR ME6000 (Mega Electronics Ltd., Finland) to monitor changes in the timing of muscle coordination during walking in flat-soled and high-heeled shoes on flat terrain and on a treadmill. We recorded the synchronized video on a Sony HDR-SR12 digital video camera (SONY Co., Japan). Motor units and their electrical potential were sensed by self-adhesive homologated hydrogels electrodes MEDICO LEAD-LOK (Medico Electrodes Int., India, ISO 13485: 2003). The research group consisted of 30 healthy women (age 25 ± 5 years, weight 57 ± 7 kg, height 16 ± 5 cm, BMI 21 ± 3), all respondents are occasional wearers of high-heeled shoes. Results: We confirmed the...

The content of the thesis is the modeling and implementation of the CNC control algorithm. This master thesis contains the description of issues of computer-controlled machines, the research of interpolation algorithms for control CNC machines and the modeling of the selected control algorithm with motor S-curve shaped speed profiles and simulation of chosen algorithms with S-shaped speed profiles in Matlab & Simulink.

The purpose of this diploma thesis was to explore possibilities, design and build 2D position system driven by PC via USB. ATmega16 and FT232R were used as the most important parts of hardware solution. Software for control of the position system was designed in C++ Builder and it can run under MS Windows XP. This work is based on semestral thesis and in future can be used in other applications or modified. 2D position system will be later used by UBMI in education and scientific applications.

The objective of this master's thesis is to design and implement a system which would be able to transfer a picture (either a bitmap or a vector image) on a foundational material. The main part of the apparatus consists of a plotter controlled by two stepping motors. The engraving itself is provided by a marker mounted to a movable part of engraving head. There was a PCB created for controlling the entire system. It contains power supplies, a microcontroller and motor and engraving head controlling circuits. The second part of the thesis shows a microcontroller program and a user interface in a PC. The image is trasfered from the PC into the microcontroller where it is processed and, based on the controlling program, engraved to the material.

This thesis deals with the issue of quantum efficiency measurement of optoelectronic devices. The physical nature of silicon solar cells is explained here. In addition, the quantum efficiency as a concept is introduced. There is also discussed the influence of a solar cell semiconductor structure on the quantum efficiency itself. Furthermore, the thesis is focused on the design of an experimental set-up for automated measurement and data acquisition. The final realization of the step motor control unit is described in detail. It includes local and/or remote operations, design and development motivation. The next chapter is dedicated to analysis of the Matlab source code for remote operation, data acquisition and presentation. The final part of the thesis gives attention to experiments with real structures, not only the solar cells. The obtained results of analyzed measurements are presented at the conclusion.

The main components of the system for embroidery sewing machine is (Veritas 8014/35-2) and pointing devices. The machine automatically entered embroidered patterns, it is necessary to construct a pointing device and its control. To drive the pointing device used two stepper motors, the control circuit to cater to the ATmega128. Communication between PC and ATmega128 provides converter FT232.