Polish Air Force Academy
Polish Air Force Academy
Zurek J.,Air Force Institute of Technology |
Czapla R.,Polish Air Force Academy
AIP Conference Proceedings | Year: 2016
Aviation technology, i.e. aircraft, control and airfield infrastructure wear out, become defective and need servicing. It seems indispensible to maintain facilities and spare parts at a level necessary to keep the technology in commission. The paper discusses the factors influencing spare parts supply requirements to secure air operations. Aviation technology has been classified with regard to various criteria, which influence the choice of supply management strategies, along with availability and aircraft exploitation cost. The method of optimization of the stock for a complex system characterized by series reliability structure according to the wear-out and cost criteria assuming Poisson's process of demand has been presented. © 2016 Author(s).
Krzyzak A.,Polish Air Force Academy
ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials | Year: 2016
Direct impact of water on laminates made of epoxy resin and glass mats of various preparations negatively affects the flexural strength of composites. Determining the minimum flexural strength allows for estimating the probability of significant deterioration in composite properties as a result of the water impact. Risk assessment of failure in given conditions of use enables constructors to take appropriate decisions on the way and time of using composites and to adopt suitable parameters at designing technical objects. The paper presents how the risk of failure changes depending on the period of water impact, pressure at production of laminates and the type of glass fibre preparation. © 2016, European Conference on Composite Materials, ECCM. All rights reserved.
Setlak L.,Polish Air Force Academy |
Kowalik R.,Polish Air Force Academy
Proceedings of the 2017 18th International Scientific Conference on Electric Power Engineering, EPE 2017 | Year: 2017
The paper presents mathematical models of the key components onboard autonomous power supply system (ASE) plane 'conventional' and more electric aircraft MEA 'More Electric Aircraft'. The subject, and also the aim of this work is the analysis and simulation of selected components of the power system of modern aircraft (synchronous generator, integrated starter/generator, voltage regulator, as device control and regulation of the generator and power electronic rectifiers multi-pulse). Simulation tests of key components confirmed the results obtained by the analytical and based on their mathematical models. The final part of the paper presents the main conclusions of the analysis and simulation based on the mathematical models of the selected components of the ASE system in accordance with the concept of a more electric aircraft. © 2017 IEEE.
wiatnicki Z.,Polish Air Force Academy
2015 4th IEEE International Conference on Advanced Logistics and Transport, IEEE ICALT 2015 | Year: 2015
This thesis presents the travelling salesman problem and the application of heuristics in ant colony optimization algorithms. The thesis also discusses the results of an experiment carried out to solve the travelling salesman problem using the ant colony system with different heuristics. An example is focused on heuristics application and comparison. © 2015 IEEE.
Grzesik N.,Polish Air Force Academy
Aircraft Engineering and Aerospace Technology | Year: 2016
Purpose - In the era of common digitalization and far reaching progress in the field of cybernetics, it is necessary to use the knowledge and experience in military cybernetics applications. In the field of machines, control fuzzy expert inference systems open new horizons and possibilities. Generally, the main affect of human efforts in the case of artificial intelligence is to create a machine with a set of behaviors and attitudes that would allow it to work independently, with ability to adjust to changing environmental conditions and an advisory role in the decision-making process. It should be noted that this technology used in some cases has already produced successful results. This paper aims to describe how the fuzzy expert inference membership function shapes influence analysis on selected air tasks efficiency evaluation results. Presented results prove that proper fuzzy membership functions shape selection has fundamental influence on aircraft system level of efficiency evaluation (its calculation accuracy). Using this technology in military aviation air tasks efficiency evaluation aspects is pioneer. Design/methodology/approach - In the era of common digitalization and far reaching progress in the field of cybernetics, it is necessary to use the knowledge and experience in the domain of cybernetics in military applications. Artificial intelligence that so much influences on the imagination of scholars actually opens new horizons when it comes to control the machines. Relatively recently, it is introduced for military applications such departments of artificial intelligence as fuzzy logic, expert systems and fuzzy control theory. Findings - In this paper, fuzzy expert inference membership function shapes influence analysis on selected air tasks efficiency evaluation results are described. Presented results prove that proper fuzzy membership functions shape selection has fundamental influence on aircraft system level of efficiency evaluation (its calculation accuracy). Practical implications - The issue solved in the paper is based on application of theoretical results in practice. The paper can be estimated to bridge the gap between theory and practice in specific field. Originality/value - Using this technology in military aviation air tasks efficiency evaluation aspects is pioneer. © Emerald Group Publishing Limited.
Komorek A.,Polish Air Force Academy |
Przybylek P.,Polish Air Force Academy
Eksploatacja i Niezawodnosc | Year: 2012
Fibre reinforced composites are often used in airplane structures because of their specific strength. One type of the materials are layered composites (laminates) applied inter alia in aircraft's covering production. Laminate is susceptible to damage resulting from impacts, the effect of which is usually invisible during macroscopic observation. The article presents results of a preliminary examination of layered composites obtained from an airplane element loaded impactly with low energy. During testing, pieces were loaded with 2.5; 5 and 10 J energy and then they were put on bend tests. The material bending strength after a shock load with 2.5 and 5 J energy remains almost unaltered, but for 10 J energy, it decreases by more than 30% in comparison to undamaged material. As a result of the examination, it was ascertained that in all cases the exact location of the damage could be difficult to find, which is a significant maintenance problem.
Oszczak B.,University of Warmia and Mazury |
Oszczak B.,Polish Air Force Academy
Artificial Satellites | Year: 2014
The GNSS standard positioning solution determines the coordinates of the GNSS receiver and the receiver clock offset from measurements of at least four pseudoranges. For GNSS positioning, a direct solution was derived for five and ten observed satellites without linearisation of the observation equations and application of the least squares method. The article presents the basic principles of methods for solving the positioning problem, the formulas and their derivation. The numerical examples with simulated pseudorange data confirm the correct performance of the proposed algorithm. The presented algorithms should be further tested with real measurements in other domains of positioning and navigation as well.
Grzesik N.,Polish Air Force Academy
Solid State Phenomena | Year: 2015
Part II of the publication concerns the next module of the project on the virtual cockpit. It is a very useful and handy educational tool for young flying adepts and ground personnel who can improve their knowledge about F-16 on-board operations on avionics and armament systems. The students (pilots and technicians) can also get familiar with integrated on-board diagnostics subsystems. Moreover, the paper examines a possibility of analysing malfunctions and faults faced during flight and within the process of maintenance. © (2015) Trans Tech Publications, Switzerland.
Grzesik N.,Polish Air Force Academy |
Sobolewski M.,Polish Air Force Academy
Aviation | Year: 2014
In this article, a project of on-board control system with fuzzy efficiency of air-task estimation subsystem for UCAV rockets is presented. Moreover, some features allowing the use of fuzzy logic subsystems in unmanned aviation will be described as well. Complexity of the project and some mathematical calculations required relevant assumptions which are also reported. Finally, prognosis about operation of the system and conclusions are provided. This article is an integral part of authors scientific research. Copyright © 2014 Vilnius Gediminas Technical University (VGTU) Press.
Grzesik N.,Polish Air Force Academy |
Kowalik K.,Polish Air Force Academy
Solid State Phenomena | Year: 2016
Authors research concern use of fuzzy expert systems in military and civilian aviation applications. Generally, the main effect of human efforts, in the case of those systems, is to create a machine with a set of behaviors and attitudes that would allow it to work independently, adjustable to changing environmental conditions and participate in decision making process. Fuzzy expert inference system supporting aircraft anti-icing system designing algorithm was described in this publication. The system uses Matlab, Fuzzy Logic Toolbox software. All problem analysis are only authors point of view about anti-icing system support. Use this technology in aircraft anti-icing system is pioneer. There are lack of publications in this topic in worldwide literature. © 2016 Trans Tech Publications, Switzerland.