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Results for “TRAJECTORIES”

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 1,603 records · Page 89

All sources NASA NTRS DOE OSTI

NASA NTRS1968

A modified Newton's method for solving trajectory optimization problems.

Modified Newton method for solution of simultaneous nonlinear equations applied to variational two point boundary value problems in trajectory optimization

Lastman, G. J.↗

NASA NTRS1968

A method of trajectory analysis with multi- mission capability and guidance application.

Trajectory synthesis for variable point mass, constant thrust, fixed staging time vehicles in vacuum

Burrows, R. R.↗

NASA NTRS1968

Trajectory optimization using regularized variables.

Trajectory optimization of space vehicle with continuous thrust based on regularized equations, comparing perturbation method for earth-Jupiter rendezvous transfer

Lewallen, J. M.↗

NASA NTRS1968

Galactic Jupiter probe trajectory design and midcourse guidance analysis.

Galactic Jupiter probe missions to make interstellar space measurements using Jupiter gravity assisted trajectories, discussing earth- Jupiter transfer orbits and mission parameters

Coady, R. E.↗

NASA NTRS1968

Trajectory analysis of a 1975 mission to Mercury via an impulsive flyby of Venus.

Trajectory analysis of 1975 Mercury mission via Venus flyby, considering closest approach altitude at Venus, impulse radius and launch energy

Wallace, R. A.↗

NASA NTRS1968

Trajectory optimization by a direct descent process.

Trajectory optimization by descent process using hybrid computer for direct cost gradient computation

Fogarty, L. E.↗

NASA NTRS1968

A method for determining optimal fixed-time, N-impulse trajectories between arbitrarily inclined orbits.

Optimal fixed time N impulse trajectory determination between inclined orbits using primer vector theory method

Jezewski, D. J.↗

NASA NTRS1968

Necessary conditions for optimal lunar trajectories with discontinuous state variables and intermediate point constraints.

Guidance regime for optimal multistage lunar trajectory derived by applying calculus of variations to generalized Bolza problem

Andrus, J. F.↗

NASA NTRS1968

An efficient method for calculating optimal free-space n-impulse trajectories.

Optimum central force transfer and rendezvous trajectories calculating technique, using primer-vector theory to determine time, number and state vector of all impulses

Jezewski, D. J.↗

NASA NTRS1968

Accessibility ellipse and minimum energy trajectories.

Unpowered orbital transfer and flight paths, discussing accessibility elliptical boundary and minimum energy trajectories

Eades, J. B., Jr.↗

NASA NTRS1968

Trajectory analysis of a Grand Tour mission to the outer planets.

Trajectory analysis of multiplanet Grand Tour mission to four large outer planets on single flight, discussing mission planning

Kingsland, L., Jr.↗

NASA NTRS1969

Trajectory optimization using regularized variables

Regularized equations for a particular optimal trajectory are compared with unregularized equations with respect to computational characteristics, using perturbation type numerical optimization. In the case of the three dimensional, low thrust, Earth-Jupiter rendezvous, the regularized equations yield a significant reduction in computer time.

Lewallen, J. M.↗

NASA NTRS1968