Search Results

1 - 10 of 174 items :

  • "Unmanned Aerial Vehicles" x
Clear All
A Review of the Characteristics of Modern Unmanned Aerial Vehicles

, AL, USA. DIMC, F. – MAGISTER, T. 2006. Mini UAV communication link systems. In 10 th International Conference on Traffic Sciences – ICTS 2006, Portoroz, Slovenia, 2006. DJI Technology Co. Ltd DJI Ground station. Available at: http://www.dji.com/products/ground-stations ERHARD, T. P. 2000. Unmanned Aerial Vehicles in the United States Armed Services: A Comparative Study of Weapon System Innovation. PhD thesis, Johns Hopkins University, Baltimore, USA, 2000. HOFFMANN, G. M. – HUANG, H. – WASLANDER, S. L. – TOMLIN, C. J. 2007. Quadrotor

Open access
A Review on Current and Emerging Application Possibilities for Unmanned Aerial Vehicles

References BARNARD, J. 2010. Remotely Piloted Aircraft in oil, gas and mineral exploration and production activities. In Presentation at the Royal Aeronautical Society Conference ‘Towards commercial exploitation of Unmanned Aircraft’, London, November 11. 2010. BLYENBURGH, P. et al. 2011. 2011/2012 UAS Yearbook – UAS: The Global Perspective. 9th Edition. Grand Forks, ND: UND. DEBUSK, W. M. 2009. Unmanned Aerial Vehicle Systems for Disaster Relief: Tornado Alley. Atlanta : Georgia Institute of Technology. DOHERTY, P. – RUDOL, P. 2007. A UAV

Open access
Propeller Optimization for Small Unmanned Aerial Vehicles

Abstract

Small-unmanned aerial vehicle propellers usually have a low figure of merit due to operating in the low Reynold’s number region due to their size and velocity. The airflow on the airfoil becomes increasingly laminar in this region thus increasing the profile drag and consequently reducing the figure of merit of the rotor. In the article, the airfoil geometries are parameterized using the Class/Shape function transformation. Particle swarm optimization is used to design an airfoil, operating in a Reynolds number of 100,000, which has a high lift to drag ratio. To avoid exceeding geometric constraints of the airfoil, a deterministic box constraint is added to the algorithm. The optimized airfoil is then used for a preliminary design of a rotor; given some design, constraints on the tip chord the rotor radius and the blade root chord, with parameters that achieve the highest theoretical figure of merit. The rotor parameters are obtained using a combination of momentum theory and blade element theory. The figure of merit of an optimal propeller with the same geometric parameters is then compared using the optimized airfoil and the Clark Y airfoil. The optimization is done in MATLAB while the aerodynamic coefficients are obtained from XFOIL. The results of the numerical simulation are presented in the article.

Open access
Analysis of Available Methods for Risk Assessment Dedicated to Unmanned Aerial Vehicles

Abstract

Aviation is becoming more and more popular. It is influenced, inter alia, by the development of general aviation (GA) and unmanned aerial vehicles (UAV). Due to the increasing number of qualified UAV users (in April 2018 there were 6846 operators in Poland with a valid certificate of qualifications) and those performing only recreational flights, it is important to ensure an acceptable level of risk in these operations. Using the available methods, the risk of five exemplary unmanned operations was assessed. The results were compared to determine their validity.

Open access
An Unmanned Aerial Vehicles Company: A Stochastic Model of Resources Overbooking

Abstract

In connection with the rapid development of commerce of unmanned aerial vehicles (UAV), the optimality of their use with UAV companies (UAVCo) is becoming increasingly important. The basis of such companies are mobile units (mobile units (MU)), which include UAV, means of their delivery to the place of rendering services and maintenance personnel. A problem of determining the optimal level of orders for the use of MU with UAVCo has been formulated and solved. The task is formulated as an overbooking task. The process under investigation is described as a discrete-time Markov chain corresponding to 24 hours. Based on a fixed number of MU and a fixed overbooking level, distributions for the number of orders on hand, the number of unfulfilled customs, and the average income with an MU usage fee and penalties for unfulfilled orders factored in have been calculated. The solution method has been tested on a particular model. For calculation used language and computer environment MathCAD.

Open access
Investigations of the susceptibility of unmanned aerial vehicles on intensive microwave radiation

Abstract

Commercially available drone type unmanned aerial vehicles (UAV), as well as parts and subsystems enabling the assemble of UAVs, are becoming more and more widely available, and their performance is constantly improving. The current possibilities of a drone assembled by a hobbyist predispose are not only to be used as a reconnaissance tool but also as a guided missile. The use of a camera with a video stream transmitter simultaneously with virtual reality goggles and video stream receiver gives the pilot an impression of being on the drone, which makes it possible to control it with extreme precision, even at high speeds. The article presents research aimed at determining the extent and type of damage made on exemplary racer drone caused by intense microwave field radiations.

Open access
Drones and Jails

. April 2018. Zaloga, S. (2005). V-1 Flying Bomb 1942-52. Oxford, UK: Osprey Publishing. Zaloga, S. (2008). Unmanned Aerial Vehicles Robotic Air Warfare 1917-2007. Oxford, UK: Osprey Publishing.

Open access
Unmanned Aerial Vehicles (UAVs) in environmental biology: a review

References Anderson K., Gaston K.J., (2013) Lightweight unmanned aerial vehicles will revolutionize spatial ecology. Frontiers in Ecology and the Environment, 11(3): 138-146. Baena S., Boyd D.S., Moat J., (2018) UAVs in pursuit of plant conservation – real World experiences. Ecological Informatics, 47: 2-9. Bagaram M.B., Giuliarelli D., Chirici G., Giannetti F., Barbati A. (2018) UAV Remote Sensing for Biodiversity Monitoring: Are Forest Canopy Gaps Good Covariates? Remote Sensing, 10(9): 1397. Ballari D., Orellana D., Acosta E., Espinoza

Open access
The Image Brightness Control System Dedicated For The Autonomous Unmanned Aerial Vehicle

8. Bibliografia [1] J. Ciesluk, Z. Gosiewski, ”Wizyjny system detekcji nieba wykorzystany do zadania omijania przeszkód przez bezzałogowe aparaty latające”, Mechanika w Lotnictwie XV, 2012 [2] Z. Gosiewski, J Cieśluk, L. Ambroziak: Vision-based obstacle avoidance for unmanned aerial vehicles, 4 th International Congress on Image and Signal Processing, IEEE Indexed, 2011, pp. 2020-2025 [3] G.C.H.E. de Croon, B.D.W. Remes, C. De Wagter, and R. Ruijsink, “Sky Segmentation Approach to Obstacle Avoidance”, Aerospace Conference, 2011 IEEE, pp. 1

Open access
Comparative Aspects Regarding The Regulation Of Unmanned Aerial Vehicles

://mobilit.belgium.be/fr/transport_aerien/espace_aerien/activites/aeromodelisme [6] http://vision-du-ciel.com/reglementation-drone.html [7] Arrêté du 11 avril 2012 relatif à l’utilisation de l’espace aérien par les aéronefs qui circulent sans personne à bord [8] “ZDv 19/1 - Joint Service Regulation 19/1 - Airworthiness Verification And Certification Regulations For Bundeswehr Aircraft And Aeronautical Equipment”; “LTF 1550-001 - Airworthiness Requirement 1550-001: Special Regulations for Airworthiness Verification of Unmanned Aerial Vehicles in the Bundeswehr”. [9] http

Open access