Results 231 to 240 of about 731,443 (292)

Rewiring gene circuits to dissect oscillatory signaling dynamics. [PDF]

Genes Dev
van Oostrom MJ, Sonnen KF.
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Fuzzy control of wing rock for slender delta wings

TENCON'92 - Technology Enabling Tomorrow, 1993
Fuzzy logic-based roll controllers are designed to control wing-rock motion of a free-to-roll stinged delta wing. The dynamics of an aircraft is a complex function of flight conditions. The free-to-roll stinged delta wing permits investigation of these variations, as well as the highly nonlinear dynamics of limit cycle at high angle-of-attack.
J. H. Tarn, F. Y. Hsu
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The pitching delta wing

AIAA Journal, 1985
Delta wings in steady flow can provide high lift at large angles of attack and are therefore used on many highperformance aircrafts. However, the unsteady aerodynamic properties of a delta wing are practically unknown, although vital for operating and designing airplanes for poststall and other maneuvering.
Mohamed Gad-el-Hak, Chih-Ming Ho
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Aerodynamical Improvement of Delta Wing and Flapping Wing

Volume 1A: Symposia, Part 2, 2015
Recently, various studies of Micro Air Vehicle (MAV) and Unmanned Air Vehicle (UAV) have been reported from wide range points of view. The aim of this study are researching the aerodynamic improvement of delta wing and flapping wing in low Reynold’s number region to develop an applicative these air vehicle.
Tadateru Ishide, Kazuya Naganuma, Shinsuke Seiji, Hiroyuki Ishikawa, Ryo Fujii, Kazuo Maeno   +5 more
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Subsonic wing rock of slender delta wings

Journal of Aircraft, 1985
Two recent experimental studies investigated the s elf-excited motion Of a flat deita wing that was free to roll about an axis parallel to its mid-span chord. In this paper these experiments are s imulated numerically. An unsteady vortex-lattice method is used to provide the aerodynamic loads, and the equation of motion is integrated by a prediction ...
P. KONSTADINOPOULOS, D. MOOK, A. NAYFEH
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Wing Rock of Nonslender Delta Wings

Journal of Aircraft, 2000
That slender delta wings will experience wing rock is an established fact, and the responsible flow mechanism is well understood. However, the same flow mechanism could not cause wing rock of nonslender delta wings. Thus, the wing rock observed for a 45-deg delta wing must be generated by a different flow phenomenon.
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Wing Rock on a Delta Wing

2006 International Forum on Strategic Technology, 2006
A numerical analysis of free roll vibrations of a delta wing in an ideal incompressible flow (wing rock) is performed by solving the coupled dynamic and unsteady-aerodynamic equations. A computational algorithm is constructed on the basis of the vortex-lattice method.
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Self-induced wing rock of slender delta wings

7th Atmospheric Flight Mechanics Conference, 1981
As part of a research program aimed at exploring basic mechanisms that cause wing rock in combat aircraft, an investigation was conducted to study the aerodynamic factors which cause the low-speed wing rock exhibited by slender delta wings. A flat-plate delta wing with 80 deg leading-edge sweep was subjected to conventional static-force tests and ...
L. NGUYEN, L. YIP, J. CHAMBERS
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Delta wing in a subsonic flow

Fluid Dynamics, 1994
On the basis of experimental wind tunnel research, a topological classification of possible delta wing flow regimes is given and a diagram in angle of attack-sweep angle coordinates is constructed. A regime with two pairs of symmetrically disposed whirlwind like vortices formed on the surface of the wing is detected.
Betyaev, S. K., Brysov, O. P.
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