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Wyświetlanie 1-15 z 164
Tytuł:
Modelling of Unmanned Aerial Vehicle – Tricopter
Modelowanie bezzałogowego statku latającego typu tricopter
Autorzy:
Źrebiec, J.
Powiązania:
https://bibliotekanauki.pl/articles/282190.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
UAV modelling
flight dynamics
tricopter
BLDC
dynamika lotu
modelowanie UAV
bezzałogowy statek latający
Opis:
This paper presents detailed models of small aerial unmanned vehicle’s subsystems like propeller, BLDC motor or Li–poly batery. Furthermore, more accurate dynamic model of Tricopter is described. This, multi–system model can be used to synthesize pecise controller which may have the advantage in hazardous situations.
W niniejszym artykule zaprezentowano modele poszczególnych podsystemów wchodzących w skład bezzałogowych statków latających. Opisano między innymi zespół napędowy składający się z silnika bezszczotkowego (BLDC) i śmigła oraz akumulator litowo-polimerowy. Dodatkowo zaproponowano dokładniejszy model dynamiki lotu tricoptera. Przytoczone modele można wykorzystać do syntezy bardziej optymalnego regulatora, który może mieć przewagę w krytycznych sytuacjach.
Źródło:
Automatyka / Automatics; 2016, 20, 1; 7-25
1429-3447
2353-0952
Pojawia się w:
Automatyka / Automatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
UAV aircraft model for control system failures analysis
Autorzy:
Żugaj, M.
Bibik, P.
Jacewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/280867.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
UAV
flight dynamics
control
reconfiguration
Opis:
In the paper, influence of control surface failures on UAV aircraft dynamics is investigated. A method for control loads determination for a nonlinear UAV aircraft model is presented. The model has been developed to analyse the influence of various control surface failures on aircraft controllability and to form the background for developing reconfiguration methods of flight control systems. The analysis of the control system failure impact on the aircraft dynamics and the ability of the control system to reconfiguration are presented.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1405-1415
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-destructive evaluation of rescue and patrol unmanned aerial vehicle
Autorzy:
Pawluczy-Majka, J.
Powiązania:
https://bibliotekanauki.pl/articles/243854.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
UAV
NDT diagnostics
active thermography
Opis:
With the growing intensity of civil usage of the UAV, one of the most important problems is safety. It consists of operational safe use of the UAV in the common air area and reliability of the aerial vehicle construction. Each flying object is subjected to external loads, which influence on it in flight and on the ground. The external loads are mainly caused by aerodynamic, weight and inertia influence, ground reaction force and the power unit [1]. That is why during service, UAV structures are prone to many mechanical and environmental conditions that can damage to composite structures in the form of delamination, fiber breakage, and matrix cracking. Monitoring the level and type of damage to a composite structure is vital to determining the component’s structural integrity and preventing the failure of the structure during flight [2]. Non-destructive testing which has been used so far to identify defects in the aircraft structure made from metallic materials has a quite limited application in the case of composite structures. With the growing use of composites in the aviation industry, a necessity appears to work out a method allowing identification of technological defects and damages appeared in the process of the UAV’s operation. The answer to the appearing demand could be, for instance, the active thermography technique used for the thin wall test of the skin elements of the UAV. The obtained research results bring closer the problem of selection of the quick, well-fitted non-destructive testing method depending on the kind of the diagnosed construction.
Źródło:
Journal of KONES; 2014, 21, 4; 411-416
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
UAV – a useful tool for monitoring woodlands
Autorzy:
Zmarz, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2037389.pdf
Data publikacji:
2014-06-25
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
UAV
woodland monitoring
image data
Opis:
Unmanned aerial systems are in many countries one of the most dynamically developing branches of technology. They have also been recognized and are being utilized by scientists who find remote sensing indispensable in their work. Today, it is increasingly common to find research teams utilizing so-called drones in field research. Unmanned systems are becoming ever more important for environment monitoring by, on the one hand, providing data from inaccessible or remote areas, and, on the other hand, reducing the human costs required by traditional large field teams while also increasing the efficiency of the work. This paper presents the possibility of utilizing UAVs for image data collection in woodland areas. Flights over Głuchów and an Arboretum were performed using two different UAVs (Mentor, AVI). The flights were made in 2010 in the middle of the growing season. Images were taken with Sigma DP2 digital cameras in four spectral channels: R (red), G (green), B (blue) and IR (infrared). Images were saved in 8-bit. The Głuchów forest complex is located in the Głuchów forest district, which forms a part of the Rogów forest division. From the administrative viewpoint, the forest division is located in the Łódzkie province, Skierniewicki Poviat. The Arboretum is a park with a collection of trees and shrubs from different regions of the world. The area is characterized by a high variability of species and trees of varying heights. It is located in the Łódzkie province, Skierniewicki Poviat.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2014, 18, 2; 46-52
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Documentation of hiking trails and wooden areas using unmanned aerial vehicles (UAV) in Tatra National Park
Autorzy:
Ćwiąkała, P.
Kocierz, R.
Puniach, E.
Nędzka, M.
Mamcarz, K.
Niewiem, W.
Wiącek, P.
Powiązania:
https://bibliotekanauki.pl/articles/101618.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
UAV
documentation
hiking trails
forest
Opis:
The research described in this article was conducted in the Tatra National Park in Poland, which is considered as one of the most-visited national parks in Europe. The exceptional popularity of this place is responsible for intensification of morphogenetic processes, resulting in the development of numerous forms of erosion. This article presents the outcomes of the research whose purpose was to verify the usability of unmanned aerial vehicles to check the condition of hiking trails and forests in alpine areas. An octocopter equipped with a non-metric camera was used for measurements. The paper sketches the methodology of data acquisition in harsh conditions and demanding locations of hiking trails on steep Tatra slopes. The paper also describes stages that lead to elaboration of basic photogrammetric products relying on SfM (Structure from Motion) technique. Finally, it shows the applicability of the prepared products to the evaluation of erosion along hiking trails, and to the study of plant succession or tree stand condition in the area located next to hiking trails.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2017, IV/2; 1545-1561
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk Assessment of Using a Contactless Method for Railway Surface Inspection as Alternative for Staff Inspection of Infrastructure
Autorzy:
Batko, Michał
Konieczny, Jarosław
Butor, Anna
Powiązania:
https://bibliotekanauki.pl/articles/27311593.pdf
Data publikacji:
2023
Wydawca:
Instytut Kolejnictwa
Tematy:
staff
inspection
infrastructure
monitoring
UAV
Opis:
Railway infrastructure managers are obliged to check technical condition of infrastructure in order to maintain safe traffic. Usually this is done using conventional methods and tools or directly through the inspections made by the technical staff . Technological development which is currently being experienced indicates the availability of new measurement methods that can be used to monitor the condition of railway infrastructure. However, the introduction of new methods for monitoring the infrastructure is usually a change affecting safety, which requires an assessment of the significance of the change for the maintenance of the required level of railway traffic safety. The authors assessed the significance of the change in the method of infrastructure monitoring and related risk assessment as a result of the use of the contactless method of checking the railway surface as an alternative method to staff inspections. Additional control measures or preventive measures for potential threats have also been indicated.
Źródło:
Problemy Kolejnictwa; 2023, 198; 98--95
0552-2145
2544-9451
Pojawia się w:
Problemy Kolejnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of mechanical properties of a rigid body in magnetic levitation state
Autorzy:
Ładyżyńska-Kozdraś, E.
Sibilska-Mroziewicz, A.
Falkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/115612.pdf
Data publikacji:
2015
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
magnetic levitation
superconductors
Meissner effect
UAV catapult
lewitacja magnetyczna
nadprzewodniki
efekt Meissnera
katapulta UAV
Opis:
Levitation (from Latin levitas - lightness) is the process in which an object is suspended by a physical force against gravity, in a stable position without solid physical contact. The phenomenon of levitation, caused by magnetic forces is called magnetic levitation. The main advantage of magnetic levitation systems is the elimination of friction, which significantly influences reliability, capability, ecology and safety. The phenomenon of magnetic levitation can be used in Unmanned Aerial Vehicle (UAV) catapult. The article presents the results of experiments performed on the prototype magnetic catapult. Catapult has been designed for small, unmanned aircraft, weighing less than 2 kg. The results show the oscillations of levitating cart of magnetic catapult during simulated and actual take-off and landing procedures.
Źródło:
Challenges of Modern Technology; 2015, 6, 1; 23-27
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unmanned aerial vehicles – source of new threats in the civil aviation
Autorzy:
Krakowiak, Ewelina
Powiązania:
https://bibliotekanauki.pl/articles/534382.pdf
Data publikacji:
2017
Wydawca:
Wyższa Szkoła Biznesu w Dąbrowie Górniczej
Tematy:
UAV
Safety
Aviation
Operation
Events
Opis:
The presence of unmanned aerial vehicles in the airspace is affected by stimulating the development of aviation but also led to the creation of a new kind of threat. The variety of design and versatility of their applications made unmanned aerial vehicles widely available to all people. The number of flight incidents involving UAV was largely caused by failure to follow the rules of safe operation and the lack of experience of the operator. Due to the effects which may entail collision with an unmanned aircraft, aviation authorities and the users themselves take a series of measures aimed at their elimination.
Źródło:
Security Forum; 2017, 1, Volume 1 No. 1/2017; 55-62
2544-1809
Pojawia się w:
Security Forum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real Time Implementation of Amphibious Unmanned Aerial Vehicle System for Horticulture
Autorzy:
Kumar, M. Arun
Sara, Dioline
Telagam, Nagarjuna
Raj, Balwinder
Powiązania:
https://bibliotekanauki.pl/articles/2202979.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CATIA
UAV
automation
thrust
throttle
Opis:
Automating the tasks that require manpower has been considered as an area of active research in science and technology. Challenges in designing such systems include accuracy in the parameters of performance, minimal hardware, cost-efficiency, and security. The efficiency of drones designed for replacing humans is often evaluated using their weight, flying time, and power consumption. Herein, the prototypebased Drone model has been designed and discussed for horticulture applications. In this model, a horticulture drone has been designed for structuring and cutting of plants in street interstates. This methodology focuses on automation engineering that is utilized for cutting the plants in less time and less power, thereby diminishing the contamination that may happen by utilizing fuels. The epic part of this plan includes the less weight drone predesigned using Computer-Aided Three-Dimensional Interactive Application (CATIA) V5 Software. The throttle for the motors is adjusted at 50% to get the required thrust for the Unmanned Aerial Vehicle (UAV) to fly. Experimental results show that the horticulture drone has comparatively more flying time and less power consumption.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 1; 127--132
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research Studio for Testing Control Algorithms of Mobile Robots
Autorzy:
Dudzik, Sebastian
Szelag, Piotr
Baran, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/1844460.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mobile robots
UAV
MATLAB Simulink
QDrone
Opis:
In recent years, a significant development of technologies related to the control and communication of mobile robots, including Unmanned Aerial Vehicles, has been noticeable. Developing these technologies requires having the necessary hardware and software to enable prototyping and simulation of control algorithms in laboratory conditions. The article presents the Laboratory of Intelligent Mobile Robots equipped with the latest solutions. The laboratory equipment consists of four quadcopter drones (QDrone) and two wheeled robots (QBot), equipped with rich sensor sets, a ground control station with Matlab-Simulink software, OptiTRACK object tracking system, and the necessary infrastructure for communication and security. The paper presents the results of measurements from sensors of robots monitoring various quantities during work. The measurements concerned, among others, the quantities of robots registered by IMU sensors of the tested robots (i.e., accelerometers, magnetometers, gyroscopes and others).
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 4; 759-768
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
RIS-aided Multi-hop Backhauling for 5G/6G UAV-assisted Access Points
Autorzy:
Janji, Salim
Sroka, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/24200733.pdf
Data publikacji:
2023
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
backhaul link
multi-hop
RIS
UAV
Opis:
Drones are considered to be an important part of future 6G telecommunication systems. Thanks to their quick deployment potential, they provide additional connectivity options in the form of a flying hotspot. However, in such use cases, they typically require a wireless backhaul link to facilitate their proper operation, which might be a challenging task in dense urban environments. One of the potential methods that may be relied upon to connect such nodes is the integrated access and backhaul (IAB) approach, where part of the spectrum allocated to users accessing the base station is used for wireless backhauling. Thus, in this work, we consider the problem of establishing a multi-hop wireless backhaul link following the IAB concept, with the aid of drone relay stations (DRSs) and reconfigurable intelligent surfaces (RISs). We formulate the problem of coverage improvement with a fixed number of relays, assuming certain throughput requirements for the backhaul link. The simulations show that the use of RISs offers a coverage improvement in such a scenario or a reduction in the number of nodes involved in ensuring the required backhaul performance.
Źródło:
Journal of Telecommunications and Information Technology; 2023, 2; 63--69
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The concept of thermovision sensor supporting the navigation of unmanned aerial platforms
Autorzy:
Bieszczad, Grzegorz
Gogler, Sławomir
Krupiński, Michał
Ligienza, Andrzej
Sawicki, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/114264.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thermal-vision
UAV
navigatio
situational awareness
Opis:
The topic of this paper is a concept of a new type of a sensor intended for unmanned aerial vehicles (UAVs). Its operation is based on processing images acquired from a thermal camera operating in the long-wave infrared band (LWIR) placed underneath a vehicle’s chassis. The vehicle’s spatial displacement is determined by analyzing movement of characteristic thermal radiation points (ground, forest, buildings, etc.) in pictures acquired by the thermal camera. Magnitude and direction of displacement is obtained by processing stream of consecutive pictures with optical-flow based algorithm in real time. Radiation distribution analysis allows to calculate camera’s self-translation vector. Advantages of measuring translation based on thermal image analysis is lack of drift effect, resistance to magnetic field variations, low susceptibility to electromagnetic interference and change in weather conditions as compared to traditional inertial navigation sensors. As opposed to visible light situational awareness sensors, it offers operation in complete darkness (harsh weather nights and indoors).
Źródło:
Measurement Automation Monitoring; 2019, 65, 1; 15-18
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Managing the deployment of UAV systems in Slovakia
Zarządzanie wdrażaniem systemów UAV na Słowacji
Autorzy:
Holubčík, Martin
Koman, Gabriel
Sroka, Włodzimierz
Powiązania:
https://bibliotekanauki.pl/articles/27315172.pdf
Data publikacji:
2022
Wydawca:
Politechnika Częstochowska
Tematy:
UAV technology
business
process management
management decisionmaking
Slovakia
technologia UAV
biznes
zarządzanie procesowe
podejmowanie decyzji zarządczych
Słowacja
Opis:
This paper affirms the anticipated utilisation of UAV (Unmanned Aerial Vehicle) systems in the market environment existing in Slovakia. Significant use of UAV systems can be considered in light of corporate management’s own lack of readiness to employ them practically. The purpose of the article is to monitor the issue in Slovakia and identify the basic starting points that the company needs to solve in the case of process management of the implementation of UAV systems in internal company processes. The methodology of the issue took place through sociological inquiries in the form of questionnaires and document analyses. The result of the investigation is that the Slovak market does not offer relevant data on the active use of UAV systems in the field of ensuring the operation of internal company management processes. Based on the information obtained, it is clear that the need to introduce UAV systems will be crucial in the future, as well as the need to develop recommendations for the process management of the implementation of UAV systems in individual areas of industry in the conditions of Slovakia.
W artykule potwierdzono potencjalne wykorzystanie systemów UAV (Unmanned Aerial Vehicle - bezzałogowych statków powietrznych) w warunkach rynkowychistniejących na Słowacji. Stopień intensywności wykorzystania systemów UAV można rozpatrywać pod kątem braku gotowości kierownictwa przedsiębiorstw do ich praktycznego zastosowania. Celem artykułu jest monitorowanie niniejszej problematyki na Słowacji oraz identyfikacja podstawowych warunków, które przedsiębiorstwo musi spełniać w przypadku procesowego zarządzania implementacją systemów UAV wspierających wewnętrzne procesy firm. Metodologia badawcza obejmowała badania socjologiczne obejmujące kwestionariusze i analizy dokumentów. W wyniku przeprowadzonego badania stwierdzono, że rynek słowacki nie oferuje istotnych danych na temat aktywnego wykorzystania systemów UAV w zakresie zapewnienia funkcjonowania wewnętrznych procesów zarządzania przedsiębiorstwem. Na podstawie uzyskanych informacji można stwierdzić, że potrzeba wprowadzenia systemów UAV będzie w przyszłości kluczowa, jak również istnieje potrzeba opracowania zaleceń dotyczących zarządzania procesami wdrażania systemów UAV w poszczególnych sektorach przemysłu na Słowacji.
Źródło:
Polish Journal of Management Studies; 2022, 26, 2; 172--188
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of phugoid oscillations of unmanned flying wing
Autorzy:
Mioduska, P.
Powiązania:
https://bibliotekanauki.pl/articles/242816.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
UAV
flying wing
longitudinal stability
phugoid oscillations
Opis:
The flying wing configuration has been considered by airplane designers for more than one hundred years. Tailless aircraft have been inspired by nature and its solutions. In present times, this configuration is used to design Unmanned Aerial Vehicle (UAV). This type of plane could serve personal, military and research purposes. The flying wing is characterized by large amount of payload space, smaller wetted area than conventional airplane and stealth capability. This makes, that it is widely applicable in rescue operations, geodetic and cartographic research, monitoring of natural resources, taking pictures or videos. Despite all the merits of tailless plane, it also has its downsides. The main problem of this type of aircraft is longitudinal stability. A conventional airplane can compensate the pitch moment of the wing with its horizontal tail but a flying wing is tailless. A slow decay of oscillations amplitude is the problem, which can be solved by active control or proper aerodynamic design. A combination of geometric characteristic such as sweep, taper, twist and location of vertical stabilizers along span, can lead to stable flying wing. In this article, the results of phugoid oscillations analysis of unmanned flying wing are presented. Research platform was X8-2, popular flying wing UAV, designed for First Person View (FPV) method to control the vehicle. The calculations were performed using 3D panel method. On the basis of calculations for three versions of the model aircraft, the dynamic characteristics were created. The analysis of longitudinal stability undertaken here has indicated propriety of applied changes in geometry.
Źródło:
Journal of KONES; 2016, 23, 2; 247-254
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of the Geometrical Representation of Buildings in Cadastre Using UAV Photogrammetry
Autorzy:
Karabin, Marcin
Bakuła, Krzysztof
Łuczyński, Robert
Powiązania:
https://bibliotekanauki.pl/articles/1838029.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
UAV
cadastre
buildings
outlines of buildings
photogrammetry
Opis:
The aim of this study was to determine the potential benefits of using UAV-based data to verify the accuracy of the geometry of the outlines of buildings registered in a cadastral database, and to investigate the potential use of data from UAV platforms in measuring the buildings. The authors examined whether the acquisition of data from UAVs can replace field measurements or only support them. The advantages and disadvantages of such data acquisition methods, compared with more well-established measurement methods, were identified.
Źródło:
Geomatics and Environmental Engineering; 2021, 15, 4; 81-99
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 164

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