A trajectory optimization technique based upon the theory of the second variation.
Optimization of trajectory achieved by successive approximation method based on second variation theory
SPACECRAFT TRAJECTORY↗
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Results for “Approximation methods”
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.
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An optimal guidance approximation theory.
Optimal guidance approximation synthesis via perturbation theory including linear, quadratic and higher order feedback approximation method
GUIDANCE AND CONTROL↗
Thermal circuit approach to vibrations in coupled systems and the noise reduction of a rectangular box.
Approximate method for complex dynamic systems under wideband vibrations in terms of energy quantities for studying noise reduction of rectangular boxes
ENERGY LOSS↗
Saturn guidance concepts
Methods to approximate variational calculus solutions in Saturn guidance
GUIDANCE↗
Radiative corrections to the energies of atoms and molecules.
Approximation method using sum rules for energy shift in atomic system due to interaction of electrons with vacuum electromagnetic field applied to hydrogen, helium and lithium atom ground states and hydrogen molecule
HYDROGEN ATOM↗
Single-particle calculations in nuclear fission.
Effective mass in nuclear deformational Hamiltonian calculated by asymptotic approximation method which is two orders of magnitude better than liquid drop model
HAMILTONIAN↗
A Two-Variable Asymptotic Solution for Three - Dimensional, Solar-Powered, Low-Thrust Trajectories in the Vicinity of the Ecliptic Plane
Two-variable asymptotic solution for three-dimensional solar powered low thrust trajectories in vicinity of ecliptic plane
ELECTRIC PROPULSION↗
Turbulent mixing /analysis/
Approximate methods for solving differential equations of motion to predict free turbulent mixing processes - single-form eddy viscosity model
EDDY VISCOSITY↗
The steady-state magnetic field in the transition region between the magnetosphere and the bow shock.
Steady state magnetic field in transition region between magnetosphere and bow shock by MHD EQUATIONS, noting solution by approximation method
MAGNETOHYDRODYNAMIC FLOW↗
The choice of trial functions in the perturbation-variation method.
Nonlinear variational trial function for atomic hydrogen dynamic polarizability, discussing first order perturbed wave function and perturbation- variation method
HYDROGEN ATOM↗
On the accuracy of calculating the scalar electrical conductivity at very low ionization levels.
Accuracy of scalar electrical conductivity calculations of partially ionized plasma using third Chapman-Enskog approximation method
PLASMA CONDUCTIVITY↗
Small, low power analog-to-digital converter
A small, low-power, high-speed, 8-bit analog-to-digital converter using silicon chip integrated circuits is suitable for use in airborne test data systems. The successive approximation method of analog-to-digital conversion is used to generate the digital output.
Dunn, R. D.↗
Dynamic stability of space vehicles. Volume 1 - Lateral vibration modes
Mathematical models and approximation methods for solving lateral vibration modes of cylindrical space vehicles and vehicles with clustered tanks
Paddock, G. B.↗
An analysis of the side-leakage effect in high-speed gas lubricated slider and partial arc bearings Interim report
Approximate methods for side leakage effect in high speed gas lubricated bearing
Elrod, H. G., Jr.↗
The usefulness of adjoint systems in solving nonconservative stability problems of elastic continua
Approximate method of stability analysis for equilibrium in elastic continuums subjected to follower type surface traction
Herrmann, G.↗
Heat and mass transfer near the stagnation point when gas is injected or sucked through a body surface
Approximation method for calculating heat, and mass exchange in laminar multicomponent boundary layer near stagnation point of injected gases
Anfimov, N. A.↗
Advanced electric propulsion research Annual report, 1 Jan. - 31 Dec. 1967
Approximation methods for electric propulsion mission analysis
Mickelsen, W. R.↗
Radiation diffusion in a medium with a strongly elongated scattering indicatrix
Approximation method for calculating radiation diffusion in medium with elongated scattering matrix
Sobolev, V. V.↗