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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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Fusalage and Tail of Competition Model Airplane
Kminiaková, Tatiana ; Hájek, Tomáš (referee) ; Janhuba, Luboš (advisor)
This bachelor’s thesis deals with empennage and fuselage design of new aircraft for design competition SAE Aero Design East 2020. The introduction is focused on regulations of this competiton and their subsequent analysis. The research part of the thesis takes in consideration possible configurations of the empennage and fuselage and their basic parameters. The most suitable configurations are compared and basic stability and load calculations are done. In the last part structural design is completed.
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Haptic Feedback System and its Reliability
Horpatzká, Michaela ; Hlinka, Jiří (referee) ; Janhuba, Luboš (advisor)
This master thesis covers conceptual design of haptic feedback system and safety and reliability assessment. System is developed for aircraft categories UL2, EASA CS-LSA, EASA CS-VLA and EASA-CS-23. Conceptual design is divided into three parts. First is aimed on haptic system test with simulator. Second is conceptual design of haptic system for in-flight test. Third part contains safety and reliability assessment and summarizes problems of haptic system installation in real aircraft.
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Integrated method utilizing graph theory and fuzzy logic for safety and reliability assessment of airborne systems
Janhuba, Luboš ; Hlinka, Jiří ; Koštial, Rostislav
This paper presents integrated algorithm for airborne system safety and reliability assessment. In general aviation (mostly up to EASA CS-23) and non-military unmanned aerial vehicles industry, safety and reliability assessment process still relays almost exclusively on human judgment. Recommended practices define processes for system modelling and safety assessing are based on analyst understanding of a particular system. That is difficult and time-consuming process. Commercial computation aids are extremely expensive with restricted (or closed) access to the solution algorithms. Together with this problem, rapid development of modern airborne systems, their increasing complexity, elevates level of interconnection. Therefore, safety and reliability analyses have to continuously evolve and adapt to the extending complexity. Growing expansion brings in the field of unnamed aerial vehicles systems which consist of items without relevant reliability testing. Presented algorithm utilizes graph theory and fuzzy logic in order to develop integrated computerized mean for reliability analysis of sophisticated, highly interconnected airborne systems. Through the usage of graph theory, it is possible to create model of particular systems and its sub-systems in the form of universal data structure. Algorithm is conceived as fuzzy expert system, that emulates decision making of a human expert. That brings opportunity to partially quantify system attributes and criticality. Criticality evaluation increases level of assessment correlation with real state of system and its attributes.
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Aircraft leading edges minor damages detection based on thermographic survey of electrical anti-icing system
Koštial, Rostislav ; Janhuba, Luboš ; Hlinka, Jiří
Aircraft leading edge is one of the most important subjects of aircraft scheduled maintenance. Leading edge as part of the slot on transport aircraft is not critical to fatigue stress in most of the cases. However, leading edge is extremely vulnerable to the accidental damage in combination with environmental damage. Maintenance is usually provided by visual inspection before every flight. Nevertheless, development of anti-icing system based on contact electrical heating opens possibility to thermographic Nondestructive Testing (NDT) methods usage. These methods could detect minor damages, which are visually undetectable especially in the case of composite materials. This paper describes possibility of thermographic methods (using anti-icing system) application as mean of leading edge minor damage detection.
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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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