Unmanned lunar roving vehicle remote guidance study
Unmanned lunar roving vehicle remote guidance, discussing onboard vs on-earth steering and velocity control, imaging system, obstacle detection and avoidance
Filetti, K. A.↗
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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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Optimal lateral guidance for low L/D shuttle vehicle entry
Optimal lateral guidance switching thresholds for low L/D shuttle vehicle entry, using optimal stochastic control theory for problem formulation in conjunction with dynamic programming
Deyst, J. J.↗
Onboard optical guidance instruments for outer planet spacecraft
Outer planets Grand Tour spacecraft onboard optical guidance instruments, discussing vidicon and image dissector systems designs
Stanton, R. H.↗
Guidance and navigation for comet rendezvous missions
Guidance and navigation requirements for rendezvous missions to two short period comets
Fraser, D.↗
Challenges in developing an approach guidance instrument for the outer planets
Onboard approach guidance instrument for Grand Tour to outer planets missions reducing fuel for corrective maneuvers by estimating trajectories
Stanton, R. H.↗
A new guidance system figure-of-merit
Guidance system figure of merit determining relative effectiveness of launch vehicle in delivering spacecraft onto interplanetary trajectory
Young, G. R.↗
Simplified interplanetary guidance using onboard optical measurements
Midcourse and planetary approach guidance by onboard optical measurements, noting application to earth-Mars trajectories and Grand Tour missions
Hamer, H. A.↗
Off-optimum timing of interplanetary midcourse guidance maneuvers
Optimal timing for interplanetary midcourse guidance maneuvers for realistic cost function, indicating first and last maneuver sensitivity
Murtagh, T. B.↗
Low-thrust guidance - An optimal stochastic control problem
Space vehicle low thrust minimum terminal variance guidance problem reduced to stochastic bang-bang optimal control system
Ash, G. R.↗
A guide to onboard checkout. Volume 1: Guidance, navigation and control
The results are presented of a study of onboard checkout techniques, as they relate to space station subsystems, as a guide to those who may need to implement onboard checkout in similar subsystems. Guidance, navigation, and control subsystems, and their reliability and failure analyses are presented. Software and testing procedures are also given.
Source record↗
Guidance and navigation requirements for unmanned flyby and swingby missions to the outer planets. Volume 1: Summary report
Unmanned spacecraft missions to the outer planets are of current interest to planetary scientists, and are being studied for the post 1970 time period. Flyby, entry and orbiter missions are all being considered using both direct and planetary swingby trajectory modes. The navigation and guidance requirements for a variety of missions to the outer planets and comets including both the three and four planet Grand Tours, are summarized.
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Guidance and navigation requirements for unmanned flyby and swingby missions to the outer planets. Volume 4: High thrust mission, part 2, phase C
The guidance and navigation requirements for a set of impulsive thrust missions involving one or more outer planets or comets. Specific missions considered include two Jupiter entry missions of 800 and 1200 day duration, two multiple swingby missions with the sequences Jupiter-Uranus-Neptune and Jupiter-Saturn-Pluto, and two comets rendezvous missions involving the short period comets P/Tempel 2 and P/Tuttle-Giacobini-Kresak. Results show the relative utility of onboard and Earth-based DSN navigation. The effects of parametric variations in navigation accuracy, measurement rate, and miscellaneous constraints are determined. The utility of a TV type onboard navigation sensor - sighting on planetary satellites and comets - is examined. Velocity corrections required for the nominal and parametrically varied cases are tabulated.
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Flammability control in the oxygen environment of the Apollo guidance and navigation equipment
The Apollo guidance and navigation (G&N) equipment test program, the redesign philosophy, and the actual equipment modifications that were used to limit burn rates in an environment of 100 percent oxygen at pressures of 6.2 and 16 psia are described. The major approach was a serious basic review of the real function of the nonmetallic materials of concern. The result of this review was that the materials could be replaced, eliminated, or covered by nonflammable metallic materials. Although several low-flammability nonmetallic materials were investigated, the direct approach of cover, eliminate, or replace generally proved to be quicker and more effective.
Holley, M. D.↗
Study of automatic and manual terminal guidance and control systems for space shuttle vehicles
A summary of the aerodynamic characteristics of the delta orbiter space shuttle vehicle is presented. Selected guidance and control system parameters, flight path geometry, landing performance obtained with winds and turbulence, and the influence of vehicle L/D on that performance are included.
Osder, S.↗
University role in astronaut life support systems: Extravehicular guidance and stabilization in space
Two problem areas are reviewed: (1) the nature of and approach to the EVA mission and (2) the guidance and stabilization required of such a mission. The report indicates several broad areas in which additional research is needed to provide an advance to the state-of-the-art. Moreover, the research problems cited were chosen from among many as those most amenable to research and study in the university environment.
Vonrenner, L. C.↗
Terminal-Area Guidance Algorithms for Automated Air-Traffic Control
Terminal-area guidance problems are solved in the form of computer-oriented algorithms. A flyable, three-dimensional trajectory is constructed that begins at the current aircraft position, heading, speed, and altitude, and that terminates at a prescribed position, heading, speed, altitude, and time. The terminal position is a waypoint and the terminal time is the assigned landing slot. The algorithms developed are applicable to all possible combinations of initial and final conditiions, and thus can be used in a closed-loop feedback law.
Erzberger, H.↗
Apollo experience report: Development of guidance targeting techniques for the command module and launch vehicle
The development of the guidance targeting techniques for the Apollo command module and launch vehicle is discussed for four types of maneuvers: (1) translunar injection, (2) translunar midcourse, (3) lunar orbit insertion, and (4) return to earth. The development of real-time targeting programs for these maneuvers and the targeting procedures represented are discussed. The material is intended to convey historically the development of the targeting techniques required to meet the defined target objectives and to illustrate the solutions to problems encountered during that development.
Yencharis, J. D.↗
Space shuttle guidance, navigation and control design equations, volume 1
Revised documentation is presented pertaining to the computation requirements for guidance, navigation, and control of the space shuttle orbiter vehicle. Separate sections cover the following areas; (1) reference documents, (2) GN and C system description, (3) GN and C software functional requirements, and (4) coordinate systems and transformations.
Cox, K. J.↗