Instytut Techniczny Wojsk Lotniczych

Wojsk, Poland

Instytut Techniczny Wojsk Lotniczych

Wojsk, Poland
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Jankowski A.,Instytut Techniczny Wojsk Lotniczych | Kowalski M.,Wyzsza Szkola Oficerska Sil Powietrznych
Journal of Konbin | Year: 2016

The paper presents diagnoses of example start-up processes of drive units built in military aircraft operated in the Dȩblin's "School of Eaglets" during the flight. The significance of this process is very important, especially from the point of view of flight safety, especially as it concerns the training aircraft, on which officer cadets-candidates for pilots are trained. The diagnosis of the start-up process was conducted using data from on-board flight recorders recorded during a flight training, whose aim was an emergency launch of particular drive units, and with the help of the so-called phase mapping of the selected operating parameters of the particular flight drive systems. The standard diagram of typical start-up systems was shown, while presenting their base subassemblies. At the end, the obtained results and the main problems that need intervention were commented, as well as further preventive activities were proposed. © 2016 Antoni Jankowski et al., published by De Gruyter Open.


Galinski C.,Instytut Lotnictwa | Lis M.,Instytut Lotnictwa | Hajduk J.,Instytut Techniczny Wojsk Lotniczych
Energies | Year: 2017

One of the airplane design concepts that potentially allows for significantly increased efficiency, but has not yet been investigated thoroughly, is the inverted joined wing configuration, where the upper wing is positioned in front of the lower one. We performed wind tunnel and flight testing of a demonstrator of this concept, first by applying electrical propulsion to simplify wind tunnel testing, and then the same electrical-propulsion demonstrator performed several flights. As the chosen propulsion method proved to be too cumbersome for an intensive flight campaign and significant loss of battery performance was also observed, the electrical propulsion was then replaced by internal combustion propulsion in the second phase, involving longer-duration flight testing. Next we identified and analyzed two potentially beneficial modifications to the design tested: one involved shifting the center of gravity towards the aft, the other involved modifying the thrust vector position, both with the assumption that electric motors can be applied for propulsion. On this basis, the paper finishes with some conclusions concerning a new concept of electrical propulsion for an inverted joined wing design, combining two ideas: hybridization and distribution along the aft wing leading edge. © 2017 by the authors. Licensee MDPI.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: SEC-2007-3.3-02 | Award Amount: 4.00M | Year: 2008

WIMAS addresses the Airborne building block of maritime surveillance with the potential for reduced cost of operation, more autonomous and improved efficiency through the introduction of air vehicles with reduced or zero onboard crew. Innovative concepts are required to support the integration of these new vehicles in a future European maritime surveillance system of systems. With 20 million km2, the surveillance of the European maritime domain has to be improved, according to the European Council, EC and Agencies such as FRONTEX. The urgent need is to control illegal immigration, but WIMAS will also contribute to other missions. You cannot control what you do not patrol. Even if cooperation is crucial, Air assets are a unique capability for wide area maritime surveillance because they provide situation awareness over extended areas (endurance, speed and long distance detection), re-direction to areas of interest (threat) and flexible reaction (inspection when needed). WiMAS will develop concepts and technologies for better operational use at lower costs of: - Maritime Surveillance Manned Airborne Vehicle (MS MAV) including existing Mission Aircraft with zero or reduced onboard tactical crew - Maritime Surveillance Optionally Piloted Vehicles (MS OPV) because regulations will not allow UAVs to fly across European Airspace for years to come. Intermediate solutions are required - Maritime Surveillance Unmanned Airborne Vehicle (MS UAV) because they will become a future key solution Supported by a User Group, WIMAS consortium will provide tangible results: - Simulation based on operational scenarios - Innovative concepts and technologies held by simulation (algorithmic modelling, remote control, sensor data fusion) - In flight experiment (remote control, crew concept) - Cost benefit analysis - Dissemination of results (workshops) - Roadmap towards the introduction of reduced-crew platforms and UAVs including R&T priorities and future programs.


Grant
Agency: European Commission | Branch: FP7 | Program: CSA-SA | Phase: SEC-2009-3.4-01 | Award Amount: 1.41M | Year: 2010

The goal of this project is to elaborate an open architecture for the operation of unmanned air-to-ground wide area land and sea border surveillance platforms in Europe. This architecture is based on analysis of concepts and scenarios for UAV-based aerial surveillance of European borders. It takes into account the emerging legislation for insertion of UAS into controlled civil airspace. The technical aspects cover surveillance sensors, appropriate aerial platforms, secure datalinks, communication networks and generic ground control station. The project particularly focuses on cost-efficient solutions enabling maximum efficiency of the UAS operations for European border surveillance.


Grant
Agency: European Commission | Branch: FP7 | Program: BSG-SME | Phase: SME-2013-1 | Award Amount: 1.50M | Year: 2013

CAESARIS project aims at developing a new, integrated security and search-and-rescue airborne solution conceived to detect people, both above visible and hidden behind opaque layers (like foliage, trailer covers, boat covers) or in darkness and reduced visibility conditions. This solution will work on board of an aerial vehicle making exhaustive and intelligent use of state-of-the-art sensors: Synthetic Aperture Radar (SAR) and Electro-Optical (EO) imagery in the visible range in an innovative way based on cognitive multispectral sensing. Considering the market opportunities in the field of security and search and rescue, CAESARIS team will develop a real-time configurable, plug-and-play and low Size, Weight and Power (SWaP) system that fulfils the requirements of the EU Security Agencies. Furthermore, CAESARIS will be able to detect and track targets on line of sight but also under opaque layers of materials (such as foliage, inside trucks, etc.) covering wide land and sea areas, 24/7, including bad weather conditions. Hence, the prime industrial objectives are: Development of a reconfigurable SAR sensor; Development of algorithms and software for the detection of targets hidden under non-transparent layers; Development of a software system for the automatic control of the multispectral sensing hardware in a context-aware manner; Development of a software module for the control of the cognitive multispectral sensing platform; Development of a pilot airborne platform. CAESARIS project has been built following the natural commercial relationship among companies that join forces to develop innovative and ambitious products. Therefore, the SMEs involved (Centum Solutions, MetaSensing, SmallGIS) take part in the project considering the complementary range of disciplines needed to develop CAESARIS concept. The RTD performers (Gradiant, Air Force Institute of Technology-ITWL, National Consortium for Telecommunications-CNIT) have been selected according to their key qualifications to meet project objectives and results and the complementarities between RTDs scientific excellence.


The article deals with laboratory test method for jet fuels thermal stability testing. Author described the reasons that led to test rig preparation, its construction and operation principles. Innovative test rig for jet fuels thermal stability testing enables research in wide thermal conditions and different pressures. Testing capabilities and advantages compared with currently used standard test method of jet fuels thermal stability testing according to ASTM D3241 have been also presented.


Przysowa R.,Instytut Techniczny Wojsk Lotniczych
Journal of Konbin | Year: 2014

In Blade Tip Timing several sensors installed circumferentially in the casing are used to record times of arrival (TOA) and observe deflections of blade tips. This paper aims to demonstrate methodology of model-based processing of aliased data. It focuses on the blade vibration excited by the forces synchronous with engine rotation, which are called integral responses. The driven harmonic oscillator with single degree of freedom (SDOF) is used to analyse blade vibration measured by tip-timing sensors during engine deceleration. When integral engine order EO is known, the linear sine fitting techniques can be used to process data from sensors to estimate amplitude, phase and frequency of blade vibration in each rotation. The oscillator model is implemented in MATLAB and used to generate resonance curves and simulate blade responses observed with tip sensors, installed in the axial compressor. Generated TOA data are fitted to the sine function to estimate vibration parameters. The validated procedure is then employed to analyze real test data. © Radosław Przysowa 2014.


Kazmierczak K.,Instytut Techniczny Wojsk Lotniczych | Przysowa R.,Instytut Techniczny Wojsk Lotniczych
Journal of Konbin | Year: 2014

Blade Tip Timing (BTT) is a non-intrusive method to measure blade vibration in turbomachinery. Time of Arrival (TOA) is recorded when a blade is passing a stationary sensor. The measurement data, in form of undersampled (aliased) tip-deflection signal, are difficult to analyze with standard signal processing methods like digital filters or Fourier Transform. Several indirect methods are applied to process TOA sequences, such as reconstruction of aliased spectrum and Least-Squares Fitting to harmonic oscillator model. We used standard sine fitting algorithms provided by IEEE-STD-1057 to estimate blade vibration parameters. Blade-tip displacement was simulated in time domain using SDOF model, sampled by stationary sensors and then processed by the sinefit.m toolkit. We evaluated several configurations of different sensor placement, noise level and number of data. Results of the linear sine fitting, performed with the frequency known a priori, were compared with the non-linear ones. Some of non-linear iterations were not convergent. The algorithms and testing results are aimed to be used in analysis of asynchronous blade vibration. © Krzysztof Kaźmierczak et al. 2014.


Woch M.,Instytut Techniczny Wojsk Lotniczych
Journal of Konbin | Year: 2012

In this work, algorithms have been used to compare the methods for determining reliability of critical points. Generalized models Stress-Strength-Interference (SSI) and Stress-Strength-Time (SST) have been analyzed. Input to the algorithms, stress and strength were generated by using the Markov chain model based on actual flight records. With this approach methods of determining the reliability of critical points of a helicopter's structure are justified.


Nita P.,Instytut Techniczny Wojsk Lotniczych
Journal of Konbin | Year: 2015

The paper has been intended to present analytically derived relationships for aircraft wheels that move through the soil medium. The analyses have been conducted for both the rigid wheel and the pneumatic whell. The most fundamental principles of constructing natural(soil) and sod/grass airfield pavements have been diccussed. Characteristic of soils typical of such pavements/surfaces have been defined. Proped are criteria for the evaluation of load-carring capacities of such pavements. The most essential principles that goven the operational use there of follow.

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