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There are a total of 1031821 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Investigation of a nonlinear control system
Author(s): Flugge-Lotz, I; Taylor, C F; Lindberg, H E
Abstract: A discontinuous variation of coefficients of the differential equation describing the linear control system before nonlinear elements are added is studied in detail. The nonlinear feedback is applied to a second-order ...
NASA Center: NASA (non Center Specific)
Publication Year: 1958
Added to NTRS: 2009-01-14
Accession Number: 93R20313; Document ID: 19930091023; Report Number: NACA-TR-1391
An analysis of once-per-revolution oscillating aerodynamic thrust loads on single-rotation propellers on tractor airplanes at zero yaw
Author(s): Rogallo, Vernon L; Yaggy, Paul F; Mccloud, John L , III
Abstract: A simplified procedure is shown for calculating the once-per-revolution oscillating aerodynamic thrust loads on propellers of tractor airplanes at zero yaw. The only flow field information required for the application of the ...
NASA Center: Ames Research Center
Publication Year: 1956
Added to NTRS: 2009-01-14
Accession Number: 93R21580; Document ID: 19930092290; Report Number: NACA-TR-1295
Matrix method of determining the longitudinal-stability coefficients and frequency response of an aircraft from transient flight data
Author(s): Donegan, James J; Pearson, Henry A
Abstract: A matrix method is presented for determining the longitudinal-stability coefficients and frequency response of an aircraft from arbitrary maneuvers. The method is devised so that it can be applied to time-history ...
NASA Center: Langley Research Center
Publication Year: 1952
Added to NTRS: 2009-01-14
Accession Number: 93R21405; Document ID: 19930092115; Report Number: NACA-TR-1070
Understanding information processing in animals as a way to building intelligent robots
Author(s): Kanerva, Pentti
Abstract: No Abstract Available
NASA Center: Ames Research Center
Publication Year: 1988
Added to NTRS: 2009-01-14
Accession Number: 91N71366; Document ID: 19910073811
An application of fuzzy logic to robotic vision and control
Author(s): Hirota, Kaoru
Abstract: No Abstract Available
NASA Center: NASA (non Center Specific)
Publication Year: 1988
Added to NTRS: 2009-01-14
Accession Number: 91N71356; Document ID: 19910073801
A vector study of linearized supersonic flow applications to nonplanar problems
Author(s): Martin, John C
Abstract: A vector study of the partial-differential equation of steady linearized supersonic flow is presented. General expressions which relate the velocity potential in the stream to the conditions on the disturbing surfaces, are ...
NASA Center: Langley Research Center
Publication Year: 1953
Added to NTRS: 2009-01-14
Accession Number: 93R21462; Document ID: 19930092172; Report Number: NACA-TR-1143
Analysis of landing-gear behavior
Author(s): Milwitzky, Benjamin; Cook, Francis E
Abstract: This report presents a theoretical study of the behavior of the conventional type of oleo-pneumatic landing gear during the process of landing impact. The basic analysis is presented in a general form and treats the motions ...
NASA Center: Langley Research Center
Publication Year: 1953
Added to NTRS: 2009-01-14
Accession Number: 93R21471; Document ID: 19930092181; Report Number: NACA-TR-1154
The near noise field of static jets and some model studies of devices for noise reduction
Author(s): Lassiter, Leslie W; Hubbard, Harvey H
Abstract: An experimental study is presented of the pressure fluctuations near jet exhaust streams made during unchoked operation of a turbojet engine and a 1-inch-diameter high-temperature model jet and during choked operation of ...
NASA Center: Langley Research Center
Publication Year: 1956
Added to NTRS: 2009-01-14
Accession Number: 93R21552; Document ID: 19930092262; Report Number: NACA-TR-1261
Theory of wing-body drag at supersonic speeds
Author(s): Jones, Robert T
Abstract: The relation of Whitcomb's "area rule" to the linear formulas for wave drag at lightly supersonic speeds is discussed. By adopting an approximate relation between the source strength and the geometry of a wing-body ...
NASA Center: Ames Research Center
Publication Year: 1956
Added to NTRS: 2009-01-14
Accession Number: 93R21571; Document ID: 19930092281; Report Number: NACA-TR-1284
Superconducting Detectors Come of Age, or Ready to Leave the Lab
Author(s): Moseley, Samuel H.
Abstract: Cryogenically cooled superconducting detectors have become essential tools for a wide range of measurement applications, ranging from quantum limited heterodyne detection in the millimeter range to direct searches for dark ...
NASA Center: Goddard Space Flight Center
Publication Year: 2008
Added to NTRS: 2009-01-14
Document ID: 20080044726
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