Results 131 to 140 of about 22,232 (271)

The radar image formation algorithms for screws of an aerial vehicle in horizontal and vertical planes in the radar sensor with inverse synthesis of antenna aperture

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2019
The radar image formation algorithms for rotating parts of an aerial vehicle in the radar sensor with inverse synthesis of antenna aperture using the monochromatic probing signal are considered.
S. R. Heister, T. T. Nguyen
doaj  

Parametric study of the noise produced by the interaction of the main rotor wake with the tail rotor [PDF]

, 1976
A model was designed, fabricated and wind tunnel tested to identify some of the parameters which were pertinent to the noise produced by the interaction of the main rotor wake with the tail rotor.
Balcerak, J. C.
core   +1 more source

Optimization of Wind‐PV Co‐Generation Systems Using Artificial Bee Colony and Back‐to‐Back Voltage Source Converter

IET Smart Energy Systems, EarlyView.
The Graphical Abstract depicts the proposed Artificial Bee Colony algorithm‐based optimal tuning of PI controllers for back‐to‐back Voltage Source Converters in a hybrid wind–PV system. ABSTRACT This paper proposes a hybrid model‐based back‐to‐back voltage‐source converter (B2B‐VSC) system comprising a Photovoltaic (PV) array and a Permanent Magnet ...
Ch. Sreenu, G. Mallesham, T. Chandra Shekar, Surender Reddy Salkuti   +3 more
wiley   +1 more source

Control of Helicopter Using Virtual Swashplate

Drones
This article presents a virtual swashplate mechanism for a mini helicopter in classic configuration. The propeller bases are part of a passive mechanism driven by main rotor torque modulaton, this mechanism generates a synchronous and opposite change in ...
Jonathan Flores, Sergio Salazar, Ivan Gonzalez-Hernandez, Yukio Rosales, Rogelio Lozano, Eduardo Salazar, Benjamin Nicolas   +6 more
doaj   +1 more source

Sailing Through Time: Building Pacific Maritime Resilience

Global Policy, EarlyView.
ABSTRACT This article examines the Pacific Blue Shipping Partnership (PBSP), an ambitious initiative aimed at decarbonising maritime transport across Oceania. The study explores the cultural, historical and technological aspects of wind‐propelled shipping in the Pacific.
Christiaan De Beukelaer, John Taukäve, Maria Sahib, Eldine Glees, Aseri Driu, Joshua Lakabung, Atina Schutz, Joseph H. Genz, Shania G. Tamagyongfal, Jerolynn K. Myazoe, Alexander Mawyer, Alson Kelen, Larry Raigetal, Raffael Held, Andrew Irvin, Morgan Wairiu, Peter Nuttall, Transform Aqorau, Kyrie Lalauvaki, Aileen Sefeti, John Kautoke   +20 more
wiley   +1 more source

Experimental studies of radar image construction algorithms for propellers and measurement method for repetition frequencies of the blades

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2019
The radar image construction algorithms for propellers of aerial vehicles belonging to the classes «helicopter» and «propeller-driven aircraft» were proposed in [1].
S. R. Heister, T. T. Nguyen
doaj  

An In-Flight Experimental Investigation of Helicopter Main Rotor/Tail Rotor Interactions [PDF]

, 1993
Experience had shown that the fidelity of the yaw control characteristics of the computer simulation models used at DRA Bedford and elsewhere was not up to the standard required for ACT control law development. It was therefore decided that the DRA model,
Ellin, A. D. S
core  

Microarrayed Allergen Molecules Distinguish IgE Sensitisation to Blomia tropicalis and Dermatophagoides pteronyssinus

Allergy, EarlyView.
This study established a microarray containing a representative panel of purified Blo t and Der p allergens for the identification of patients sensitised to Blo t and/or Der p. Results indicate that the microarray based on Blo t and Der p allergens is a useful tool for the identification of Blo t‐ and/or Der p‐sensitised patients. The microarray may be
Nishelle Dsouza, Siratcha Phanthong, Huey‐Jy Huang, Milena Weber, Eszter Sarzsinszky, Petra Zieglmayer, Gabrielle Pauli, Margarete Focke‐Tejkl, Mikhail Tulaev, Nikolina Todorovic, Walter Keller, Thomas Schlederer, Luis Caraballo, Anchalee Tungtrongchitr, Rudolf Valenta, Pongsakorn Tantilipikorn, Susanne Vrtala   +16 more
wiley   +1 more source

COMPUTATIONAL MODELING OF AERODYNAMIC INTERFERENCE OF HELICOPTER MAIN AND TAIL ROTORS AT THE SPECIAL FLIGHT REGIMES

Научный вестник МГТУ ГА, 2016
This article is concentrated on modeling and researching of aerodynamic characteristics of main and tail rotors’ combination of a single-rotor helicopter scheme. Non-linear free wake vortical model with diffusion of free wake is used.
Y. M. Ignatkin, P. V. Makeev, A. I. Shomov   +2 more
doaj  

Electrical machine technologies for an electric tail rotor drive [PDF]

, 2015
This paper present findings from an EU JTI Clean Sky funded program investigating the feasibility of driving electrically the tail rotor of a helicopter.
Farman, J., Stickels, K., Yon, J., Booker, J.D., Brinson, P., Mellor, P.H., Barber, M., Williamson, S.   +7 more
core   +1 more source