Results 221 to 230 of about 10,801 (245)

OBSERVER-BASED CONTROL OF A PVTOL AIRCRAFT

IFAC Proceedings Volumes, 2005
Abstract In this paper, we propose an observed-based control for the PVTOL aircraft considering that the angular position is not measurable. The control strategy presented here, is robust with respect to observer errors and takes into account constraints imposed by the nonlinear observer.
Anand Sánchez, Isabelle Fantoni, Rogelio Lozano, Jesús De León Morales   +3 more
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Aircraft positioning using GPS/GLONASS code observations

Aircraft Engineering and Aerospace Technology, 2019
Purpose This paper aims to present the problem of the integration of the global positioning system (GPS)/global navigation satellite system (GLONASS) data for the processing of aircraft position determination. Design/methodology/approach The aircraft coordinates were obtained based on GPS and GLONASS code observations for the single point ...
Kamil Krasuski, Janusz Cwiklak, Marek Grzegorzewski   +2 more
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Aircraft observations of marine stratocumulus during JASIN

Quarterly Journal of the Royal Meteorological Society, 1982
AbstractObservations of marine stratocumulus obtained by three research aircraft during the JASIN experiment are presented. Detailed measurements were made of the thermodynamic, cloud physics and radiation fields. These showed an essentially well‐mixed boundary layer with cloud liquid water contents close to their adiabatic values. The mean drop radius
A. Slingo, S. Nicholls, J. Schmetz
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Some Observations on the Mechanism of Aircraft Wing Rock

Journal of Aircraft, 1978
A pressure scale model of Northrop F-5A was tested in NASA Ames Research Center Eleven-Foot Transonic Tunnel to simulate the wing rock oscillations in a transonic maneuver. For this purpose, a flexible model support device was designed and fabricated which allowed the model to oscillate in roll at the scaled wing rock frequency. Two tunnel entries were
C. HWANG, W. PI
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Clear-Air Turbulence: Simultaneous Observations by Radar and Aircraft

Science, 1967
Ultrasensitive radars and uninstrumented jet aircraft in concert have probed regions of the clear atmosphere in search of clear-air turbulence. All sources of clear-air radar echoes above 6 kilometers that were probed simultaneously by the aircraft were found to be turbulent.
J J, Hicks, I, Katz, C R, Landry, K R, Hardy   +3 more
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Advancing Tropical Cyclone Forecasts Using Aircraft Observations

2014
Advances in the study of tropical cyclones using aircraft observations came about through improvements (scientific and technological) in the ability to observe different aspects of the storms. Early studies provided the basis for understanding tropical cyclone structure and evolution (for an excellent overview see Dorst, 2007).
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Observed Rotordynamic Phenomena in Aircraft Gas Turbine Development

Volume 8: 27th Conference on Mechanical Vibration and Noise, 2015
Observations, analysis and understanding of out-of-the-ordinary rotordynamic phenomena (including several instabilities and nonlinear responses) observed in aircraft gas turbine engines and other high-speed rotating machinery over the course of the author’s career in the design and development of aircraft gas turbine engines are described.
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Earth observations from NASA aircraft

27th Aerospace Sciences Meeting, 1989
BERNARD NOLAN, CHRISTOPHER THOMPSON, ANDREW CAMERON   +2 more
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Cosmic radiation observations in civil aircraft flights

AIP Conference Proceedings, 2023
A. Gunawan Admiranto, Clara Y. Yatini, Johan Muhamad, Siti Maryam, null Elyyani, Hasnel Sofyan, Heru Prasetyo, null Kusdiana, Ferdiansyah Noor   +8 more
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An Aircraft Landing System Employing Observers

Conference Proceedings Southeastcon '81., 2005
R.F. Wilson, C.L. Phillips, E.R. Graf, S.A. Starks   +3 more
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