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Analysis of ageing of selected materials used in sewage systems
Horák, Marek ; Stanko,, Ing Štefan (referee) ; Tlolka, Jan (referee) ; Raclavský, Jaroslav (advisor)
The doctoral thesis deals with analysis of the ageing of concrete and reinforced concrete pipes in sewage systems. The ageing of the sewage system is caused by several reasons, for example material abrasion, chemical and biological corrosion and subsequent static overload sewer construction. One of the common causes of degradation of sewage systems made from materials bonded with cement sealant is biogenic sulphate corrosion. Due to the corrosion the degradation of the pipe walls accelerates, particularly in upper part of the pipe and reduces planned lifetime of the sewage system. There is proposed new ageing analysis monitoring method for observation and evaluation of the loss of thickness of concrete and reinforced concrete pipes, which is caused by biogenic sulphate corrosion. Residual lifetime is calculated from the expected corrosion rate, it`s the loss of wall thickness on the monitored section of the sewer system. There is designed the monitoring system of the loss of wall thickness on the sewage system for practical application of the measurement procedure, which is administrated in cooperation with the BVK, a. s. The thesis uses existing knowledge regarding this subject. We use this information for better understanding of the process of the loss of wall thickness in sewage systems in real time and the posibility to correct and in-time implementation of appropriate operational measures. This should cause the limitation of the degradation process of piping material while extended service life and safe operation in sewage systems within the required time period. Based on the methodology is proposed to determine the residual life of the sewage system and maintenance and rehabilitation can be done more effectively. There is needed to be noted that only long-term monitoring period can bring a better overview of the technical condition of sewage systems in time and thus better and more effective maintenance and rehabilitation, which is related to the effective u
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Design of VUT200 TwinCobra landing gear
Novák, Josef ; Horák, Marek (referee) ; Katrňák, Tomáš (advisor)
The goal of following master thesis is to design variety of configuration and retraction options of VUT200 TwinCobra landing gear. For each option are a wheel base and a gauge set up by possibility of main landing gear retraction. Next, CS 23 demands and stress analysis are followed. There is a view of twin engine aircraft landing gear disclosed as well.
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Remotorization of the aircraft EV-55 Outback
Puller, Tomáš ; Weis, Martin (referee) ; Horák, Marek (advisor)
Thesis Remotorization of the aircraft EV-55 Outback deals with possibility of installationt piston diesel engine instead of turboprop engine PT6A-21. Begining of this thesis deals with choice of convenient engine and propeller. Then, 3D model of engine bed is designed, followed by mass analysis. Based on results from the mass analysis and requirements from the CS - 23 regulation, load is specified and stress analysis is done. The other part of this thesis deals with adjustment of the airframe and with calculation of flight performances. Finally, economic indices are specified.
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Twin Engine Aaircraft Design for Commuter Category
Horák, Marek ; Jebáček, Ivo (referee) ; Juračka, Jaroslav (advisor)
This master’s thesis deal with design of EV-55 Outback airplane with pressurized cabin. In this thesis are given common principles and requirements of regulations on construction pressurized cabin. A necessary fuselage modifications and fuselage construction are included. Also construction and build up of air-conditioning system and emergency oxygen system are included. Some parts of this thesis are about weight and balance, definition of pressurized cabin load, simple stability analysis and basic flight performance calculation. At the end of this master’s thesis a result of weight and flight performances are compared with analogous airplanes by other producers.
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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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Wing High Lift Devices
Rakovský, Kristián ; Weis, Martin (referee) ; Horák, Marek (advisor)
This bachelor’s thesis deals with wing high lift devices. Thesis states the purpose of high lift devices, their division, a brief overview of their history and a detailed description of particular devices with mentioning their advantages, disadvantages and usage in aviation. A part of the thesis also contains a short statistic, which compares wing high lift devices of high capacity transport aircraft.
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Summary of Micro Unmanned Aerial Vehicle
Krejčí, Jan ; Horák, Marek (referee) ; Dofek, Ivan (advisor)
This bachelor’s thesis deals with summary of miniature unmanned aerial vehicles. There is a reference to their historical development, the categorization of unmanned aerial vehicles and definition of category MAV. The thesis contains overview of some chosen representative members of category MAV and their parameters and picture documentation. The last part of this thesis deals with possible applications and basic information about artificial intelligence used for controlling these aerial vehicles.
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Air transport helicopters
Rybka, Slavomír ; Horák, Marek (referee) ; Nastálek, Ondřej (advisor)
The Bachelor thesis contains introduction of the helicopter techniques from the beginning of their development to the present. The work includes complex view on the types of the transport helicopters based on their characteristic elements of design. The machines are devided according the number and location of the rotor, the method of dealing with reaction torque, engine type, the type of rotor heads and take-off weight. There is an overview of selected types of categories for each group, too. The work also includes profiles of selected companies which provide services related to helicopter transport in the Czech and Slovak Republic, including pricing list of services they offer.
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Airplanes with VTOL and STOVL characteristics
Kováčik, Matej ; Koutník, Tomáš (referee) ; Horák, Marek (advisor)
Review article, which dissertates about concepts and characteristics of airplanes in VTOL and STOVL category. The main part of text deals with advantages and disadvantages of specific problems and their solutions like use of different propelling solutions, means of handling in flight with low or zero airspeed and transitions to forward flight. Next it contains an overview of chosen airplanes in this category with description of their use and conceptual solutions.
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Aircraft air-conditioning systems
Lednický, Ondřej ; Horák, Marek (referee) ; Třetina, Karel (advisor)
The bachelor thesis is focused on the aircraft air-conditioning systems, their functions and basic tasks needed for a safe and comfortable flight. The thesis is divided into several chapters: the first one deals with the most important factors influencing human health. Next chapter is focused on a description of the assurance of main components which are composing the aircraft air-conditioning system. Final chapter of the thesis deals with oxygen systems, which are essential for the survivor of the passengers in the case of an accident.
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