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The Integrated Method Utilizing Graph Theory and Fuzzy Logic for Safety and Reliability Assessment
Janhuba, Luboš ; Vališ, David (referee) ; Třetina, Karel (referee) ; Hlinka, Jiří (advisor)
Dizertační práce se zabývá návrhem integrované metody hodnocení bezpečnosti a spolehlivosti palubních leteckých systém za použití teorie grafů a fuzzy logiky. Navržená integrovaná metoda je univerzálně použitelná v oblasti hodnocení bezpečnosti a spolehlivosti, nicméně je primárně navržená pro použití v oblasti General Aviation a civilních bezpilotních prostředků. Současná podoba hodnocení spolehlivosti je téměř výhradně závislá na úsudku analytika. Použití komerčních softwarových nástrojů pro hodnocení spolehlivosti je extrémně nákladné, přičemž možnost přístupu a úpravy použitých algoritmů je minimální. Současný prudký vývoj palubních letecký systému je spojen s jejich zvyšující se komplexností a sofistikovaností. Integrovaná metoda používá teorii grafů, jako nástroj modelování funkčních závislostí mez jednotily prvky systému. Použití teorie grafu současně umožňuje daný systém analyzovat, hodnotit hustotu vzájemné funkční vazebnosti, identifikovat důsledky případných poruchových stavů. Aplikace fuzzy logiky umožňuje manipulovat s expertní znalostí a stanovit kritičnost daného prvku a systému. Kritičnost prvku zohledňuje pravděpodobnost jeho selhání, možnost detekce dané poruchy, závažnost těchto selhání vzhledem k vlivu na alokované funkce.
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Modern avionics system architecture for EASA CS-23 airplane
Vaňousová, Jana ; Hlinka, Jiří (referee) ; Janhuba, Luboš (advisor)
This master thesis covers with the modern architecture of avionics system for EASA CS-23 AIRPL. The thesis contains EASA CS-23 and EU-OPS analysis and market analysis of avionics systems for this category of aircrafts. The thesis also includes the design of avionics system architecture and its safety and reliability assessment – used tool is Failure Mode and Effect Analysis (FMEA). At the end of the thesis there is assesment of potential attack of the avionics system by third part.
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Proposal of electro-hydraulic control system for the nose gear of small transport aircraft
Vodička, Petr ; Janhuba, Luboš (referee) ; Třetina, Karel (advisor)
The diploma thesis is focused on design of electrohydraulic system for nose gear control on small civil airliners. First part consists of brief review of small civil airliners, nose gears and CS 23 restrictions relevant for the design. In practical part a typical small civil airliner is defined and kinematic of landing gear mechanisms is designed. Then the electrohydraulic system itself is designed and parameters of some components are suggested. The wheel steering mechanism is simulated and, in conclusion, the whole system is evaluated.
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The meaning and essence of aeronautical information services in civil aviation
Dubnický, Lukáš ; Janhuba, Luboš (referee) ; Chlebek, Jiří (advisor)
The aim of this thesis is to produce an integrated overview and characteristic of practices and activities which are implemented to provide aeronautical information service in Czech Republic. The main information source is the Czech aeronautical law L15 which meets ICAO Annex 15 requirements. Due to high level of standardization, a great deal of information related to aeronautical information services in the Czech Republic can be understood as generally correct for ICAO based systems of other states. Where possible theoretical information are connected with practical applications.
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Propelling nozzles of turbofan engines
Milko, Michal ; Janhuba, Luboš (referee) ; Šplíchal, Miroslav (advisor)
The thesis describes the work principle of propelling nozzles of two-stream engine in terms of thermodynamics and also describes common design solutions which are used at most types of turbofan engines. Thesis also describes the advantages and disadvantages of each adjustments and trends in development of propelling nozzles.
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Flying drones rescue systems
Hájek, Tomáš ; Janhuba, Luboš (referee) ; Pejchar, Jan (advisor)
This paper addresses the issue of security and integration of UAVs in air traffic operations and analyses possible risks. This work defines methodology to demonstrate airworthiness of the parachute recovery system under extreme climatic conditions. The first part of the methodology deals with the compliance performance requirements in external environment and the second part verifies performance parachute canopy. Methodology developed herein is subsequently verified by practical tests on parachute recovery system Galaxy GBS 10.
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Analysis of the operational risks of newly introduced aircraft types
Sklenář, Filip ; Janhuba, Luboš (referee) ; Chlebek, Jiří (advisor)
This thesis examines the process of introducing a new aircraft into the service, in particular by the steps from initial vision of a new aircraft until after the aircraft. The content of the thesis consists of seven parts. In the first four sections, I describe the organizations involved in aviation and reliability, physical principles of aircraft systems, accident statistics, regulatory requirements. The fifth section focuses on reliability and describes the procedures for the analysis of reliability. The sixth part is focused on the procedure for introducing new aircraft into service and also includes the methodology for eliminating the element of lack of confidence, which was one of the main objectives of this work. The seventh part is a demonstration of the procedure for the introduction of aircraft into operation.
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Cockpit instruments for four-seater sport and leisure aircraft
Liberda, Jiří ; Janhuba, Luboš (referee) ; Hlinka, Jiří (advisor)
This master thesis includes a comprehensive review of four-seater sport and leisure aircraft with focus on their cockpit instruments. The description of the selected glass cockpits is listed. Thesis also includes design of instrument panel, which is designed according to the relevant regulations and standard configuration of existing aircrafts. There is also a brief overview of the regulations necessary for the installation of these systems in the aircrafts. At the end of the this work is failure mode and effects analysis, with calculation of probability malfunction for critical functions.
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Functional Hazard Assessment of Small Aircraft
Hartman, Matěj ; Janhuba, Luboš (referee) ; Hlinka, Jiří (advisor)
The object of this diploma thesis is to perform Functional Hazard Assessment of small four-seat aircraft according to Federal Aviation Regulations Part 23, which would be similar to present aircrafts on market. Input data were acquired by research of systems aircrafts use on current market. On this basis the Functional Hazard Assessment was performed ad aircraft level. Total loss of power supply was qualified as Catastrophic therefore is used in following assessment. A preliminary failure rate assessment of typical parts used in electrical system was performed at the end of diploma thesis. For the most crucial parts a simple model was created and failure rate computed.
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