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Magnetostrictive materials for mechatronics
Rusková, Miroslava ; Kovář, Jiří (referee) ; Hadaš, Zdeněk (advisor)
The aim of this work is to outline and use or application of magnetostrictive materials and possibilities of mathematical modeling their behavior. Magnetostrictive is the physical character of the material, occurs in the most ferromagnetic materials and leads to many effects. Magnetostrictive materials are more often used to in various branches of engineering.
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Measurement of complicated shape parts using image processing
Sujová, Sára ; Březina, Michal (referee) ; Štětina, Josef (advisor)
The bachelor's thesis deals with the topic of wear measurement of the pinion gear of the REA actuator used in the regulation of the turbocharger wastegate system. The first theoretical part of the thesis describes the topics of wastegates, actuators, gears and optical methods. In the second part, a pinion measurement method is implemented using a digital microscope and an application to measure the width of the pinion tooth thickness designed in the MATLAB environment.
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Exoskeleton design
Štancl, Jan ; Lázna, Tomáš (referee) ; Kopečný, Lukáš (advisor)
The bachelor paper „Exoskeleton design“ deals with development of prosthetic exoskeleton of index finger. The exoskeleton is for patient who lost the distal and middle articles of the index finger. The exoskeleton consist of three articles. Distal and middle articles are powered by one linear actuator, proximal article is passive. The articles are mechanically connected to each other. The rotary potenciometer senses the bend angle at the MP joint, which corresponds to the desired position of the exoskeleton. Feedback is provided by optic gate that senses the engine revolutions.
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Structural design of testing facility for actuator stroke and force measurement
Zatloukal, Tomáš ; Vaněk, František (referee) ; Horák, Marek (advisor)
The bachelor thesis examines the design of testing facility for heat switch. It focuses mainly on the construction, but it does not omit the necessary measuring equipment, measuring procedures and other specifications. The first part describes the requirements for the development of experimental facility. The next part deals with the selection of position sensor and force sensor, which includes an extensive study of possibilities. The following section deals with the automatically controlled heating system and temperature measurement, lists the necessary parameters of components, and proposes their implementation. The final part of the thesis describes how to achieve to the structural design of the testing facility. There are also strength analyses and measurement procedures for pressure and tensile testing.
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Sensorless velocity control and positions of d.c. low-power brush motor
Svoboda, Jan ; Hanák, Pavel (referee) ; Prajzner, Václav (advisor)
This bachelor's thesis focuses on sensorless control of low load brushed DC motor that is used in the actuators made by the Honeywell company. The first part provides an introduction into motor control and common used methods of speed and position sensing of brushed DC motor. Sensorless method of sensing described in this work is the detection of commutation pulses from the signal of motor current. These pulses are caused by brushes leaping over the commutator bars. Correct evaluation of commutation pulses can provide the information about velocity and position of the motor. This relatively new method of detection of commutation pulses is investigated and arising problems are demonstrated on measured samples of signal. Suitable methods of signal processing are then proposed. Infallibility of these signal processing methods is then proved on the set of signals measured under circumstances of supply voltage and abrasion. Then it is decided which signal processing method that sensorless control system can use is the best.
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Aircraft Flight Controls Actuator - Modeling and Control
Kolář, Bohumil ; Kopečný, Lukáš (referee) ; Pohl, Lukáš (advisor)
The aim of this bachelor thesis is to compile and control the actuator model, which approximates the behavior of a real actuator under load. The work describes individual types of actuators and their properties. The mathematical model of the actuator is also described. This model consists of a motor and a load. The mathematical model is applied in the Simulink environment where a control structure was designed and added. The work also describes the construction of the real actuator and its subsequent testing in the ControlDesk. The results of the individual test are in the form of step responses.
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Sensorless control of revolutions and position of DC motor
Kakáč, Petr ; Minář, Jiří (referee) ; Prajzner, Václav (advisor)
This thesis deals with the management and control of DC brush motors used in Honeywell actuators. The introduction describes the types of DC brush motors and possibilities of regulation. We chose the method of compensation of the load characteristics. The basic requirement for this job is a requirement to ensure constant engine speed under various load torque. For this requirement it is necessary to develop a mathematical model of the static engine, calculate, verify that the motor constants and, not least, the implementation of the static model for a given engine. The work focuses on the limits of such an engine control or the limitations that we created conditions in practice.)
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Automation of track for measurement of water valves characteristics
Lekeš, Pavel ; Havlíková, Marie (referee) ; Šedivá, Soňa (advisor)
My diploma thesis describes upgrade of flowbench serving as test rig for regulation valves characteristic measurement. At the beggining, there is an introduction to the water regulation valves theory followed by current machine condition description. Next chapter defines needed improvements and at the end follows proposition of improvements and necessary component definition and final realization. Final chapter summarizes complete project.
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Actuators in aviation
Jetela, Václav ; Horák, Marek (referee) ; Bencalík, Karol (advisor)
The bachelor thesis with name “Actuators in aviation” deals with complete review of hydraulic and electric powered actuators used in aircrafts in a first part. Second part of the thesis is dedicated to review of hydraulic systems. Each chapter contains description of function and schematic drawings. There are mentioned construction designs of actuator test stand for performance testing. Last part of the thesis includes comparison of actuators according to the performance and application in aircrafts.
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