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Results for “Variational calculus”

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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At least 109 records · Page 6

All sources NASA NTRS DOE OSTI

NASA NTRS1963

VARIATIONAL APPROACH TO THE CALCULATION OF CHARGE EXCHANGE CROSS SECTIONS FOR ADIABATIC COLLISIONS

Variational approach to calculation of charge exchange cross sections for adiabatic collision

CHARGE EXCHANGE↗

NASA NTRS1964

Solution of variational problems by means of a generalized newton-raphson operator

Solution of variational problems using newton- raphson operator

VARIATIONAL CALCULUS↗

NASA NTRS1963

Optimal multistage rocket flight and other discontinuous variational problems

Discontinuous variational problems & optimal flight of multistage rockets

MULTISTAGE ROCKET↗

NASA NTRS1965

Necessary conditions for a multistage bolza- mayer problem involving control variables and having inequality and finite equation constraints

A multiplier rule and analogues of the Weierstrass and Clebsch conditions are developed for a multistage Bolza-Meyer calculus of variations problems. The number of stages is fixed, but partition points defining state boundaries are variable. Discontinuities are allowed in variables finite equations and inequalities, as well as differential equations, all of which involve control variables. An appendix summarizes some of the results obtained by C. H. Denbow, as modified by R. W. hunt, for a generalized Bolza problem. The appendix is independent of the rest of the paper.

Differential equation↗

NASA NTRS1965

First order control for low-thrust interplanetary vehicles

First order control for low thrust interplanetary vehicles based on calculus of variations and Weierstrass E-function

FIRST ORDER EQUATION↗

NASA NTRS1965

Go, no-go for the Apollo spacecraft - An analytical solution

Analytical expression of go no-go criterion for insertion of Apollo spacecraft into earth parking orbit

PARKING ORBIT↗

NASA NTRS1966

Variational problems and their solution by the adjoint method

Variational problems and solutions by adjoint method

BOUNDARY VALUE PROBLEM↗

NASA NTRS1966

Averaging methods for differential equations with retarded arguments and a small parameter.

Averaging method for differential equations with retarded arguments

PERTURBATION THEORY↗

NASA NTRS1966

A method of determination of state variables for known plants.

State variable determination for linear time invariant plants with known parameters, noting noise suppressing characteristics of technique

NOISE SUPPRESSOR↗

NASA NTRS1966

Axisymmetric thermal stresses in sandwich shells of revolution.

Reissner variational formulation of temperature distribution boundary value problem of axisymmetric thermal stresses in isotropic sandwich shells of revolution

TEMPERATURE DISTRIBUTION↗

NASA NTRS1966