Studies of thrust vector control of large space vehicles Final report
Display systems, fluid amplification techniques, stochastic processes, and thrust vector control systems
Boland, J. S., III↗
SEARCH · Engineering Papers
Results for “Vectorization”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Optically pumped resonance magnetometer for determining vectoral components in a spatial coordinate system Patent
Design and development of optically pumped resonance magnetometer for determining vectoral components in spatial coordinate system
Rempel, R. C.↗
Spin vector control for a spinning space station. Volume 2 - Analytic manual Final report
Computer manual for calculating dynamic vector control of dual spin space station
Guderian, W.↗
Design, fabrication, and test of omnidirectional flexible seals for thrust vector control of large solid rocket motors Final report
Omnidirectional flexible, rubber-steel seal design, fabrication, and performance testing for solid propellant rocket engine thrust vector control
Wong, E. Y.↗
Tertiary flow injection thrust vectoring system Patent
Tertiary flow injection system for thrust vectoring of propulsive nozzle flow
Kepler, C. E.↗
On estimating the Venus spin vector from data obtained during the planetary explorer mission
Venus spin vector estimation using planetary Explorer spacecraft data
Argentiero, P.↗
On the noninferior set for the systems with vector-valued objective function
Noninferior set for static optimization of systems with vector valued objective function using dual linear inequality
Chu, K.-C.↗
A vector solution for electromagnetic wave scattering from a rough surface of arbitrary dielectric constant
Vector solution for electromagnetic wave scattering from rough surface of arbitrary dielectric constant
Kaufman, D. E.↗
Minimum delta-V, three-impulse, non-coplanar transfer from a circular parking orbit onto an asymptotic velocity vector for small declination angles - An approach to the trans-Mars launch window problem
Trans-Mars launch window problem, discussing minimum delta-V three-impulse noncoplanar transfer from circular parking orbit onto asymptotic velocity vector
Bean, W. C.↗
Vectoring of the beam from ion bombardment thrusters
Beam vector control from ion bombardment thrustors with dual grid electrostatic, movable screen electrode and discharge chamber extraction systems
Collett, C. R.↗
Some aspects of gaseous secondary injection with application to thrust vector control
Two dimensional sonic nonreacting gaseous secondary injection into supersonic primary stream with turbulent boundary layer for application to thrust vector control
Doyle, H.↗
Regularization of vector fields by surgery
Excising neighborhood of singularity from manifold with vector field definition, making possible regularization of two and three body problems
Easton, R.↗
Viking thrust vector control dynamics using hybrid coordinates to model vehicle flexibility and propellant slosh
Viking vehicle structural flexibility and propellant sloshing effects on thrust vector control dynamics, obtaining computer simulated responses for hybrid and discrete coordinate models
Fleischer, G. E.↗
A method for star vector determination from alignment optical telescope sighting
A method is described for determining the measured star vector in LM body coordinates when the measurement data consist of a spiral measurement, a cusor measurement, and a time associated with each measurement. The method is defined from alignment optical telescope (AOT) sightings from the LM on the lunar surface. This formulation will be coded into the real-time computer complex off-line AOT and gravity (AOT+G) bench program, the Gravity-Optics LM Attitude and Position (GOLAP) program.
Crigler, S. W.↗
A flight evaluation of a vectored thrust jet V/STOL airplane during simulated instrument approaches using the Kestrel (XV-6A) airplane
An in-flight investigation was made to determine the terminal-area operating problems of a vectored-thrust-jet vertical and short take-off landing (V/STOL) airplane under simulated instrument conditions. Handling-qualities data pertinent to the terminal-area approach and landing task are presented in the text, and additional documentation is included in the appendixes. Problems dealing with the cruise letdown to localizer capture, conversion to powered-lift flight, precise control of the glide slope, approach velocity or deceleration schedule, hover, and landing are discussed.
Morello, S. A.↗
Automatic recognition of vector and parallel operations in a higher level language
A compiler for recognizing statements of a FORTRAN program which are suited for fast execution on a parallel or pipeline machine such as Illiac-4, Star or ASC is described. The technique employs interval analysis to provide flow information to the vector/parallel recognizer. Where profitable the compiler changes scalar variables to subscripted variables. The output of the compiler is an extension to FORTRAN which shows parallel and vector operations explicitly.
Schneck, P. B.↗
Measurement of the wave-normal vector of proton whistlers on Ogo 6.
Description of the first experimental determination of the wave-normal vector of proton whistlers in the ionosphere. Between the crossover frequency and the proton gyrofrequency, both right-hand and left-hand modes of propagation can occur for upgoing waves. Theoretically, the amount of energy in the respective modes depends on theta, the angle between the wave normal and the magnetic field. For proton whistlers with only left-hand mode energy between the crossover and proton gyrofrequency, theta ranged from 36 to 51 deg. For proton whistlers with strong right-hand and left-hand mode signals, theta ranged from 24 to 29 deg. The result is in good agreement with Wang's (1971) collisionless mode-coupling model. The angle between the wave normal and the vertical is found to increase with increasing altitude.
Chan, K. W.↗
Design of optimal probing signals for vector parameter estimation.
In the design of optimal inputs or probing signals for parameter estimation, it is more natural to consider functions of the Fisher information matrix as the criterion of optimality instead of some function of the error covariance matrix. The input which maximizes the Fisher information measure for efficient estimation of a scalar parameter also provides the minimum error variance. The information is thus a logical choice for the optimality criterion in scalar problems. No such obvious choice is apparent for vector parameter estimation. A number of performance measures are examined and compared in the present study, and a useful criterion is selected. The design of an optimal probing signal using this criterion is shown to be equivalent to an optimal control problem in which certain equality constraints must be satisfied. This problem may be solved by conventional techniques of deterministic or stochastic optimal control.
Nahi, N. E.↗