Techniques are investigated for soft landing of manned and unmanned vehicles on moon;primary interest is terminal phase of landing just prior to touchdown, at which time final controlled decelerations are applied to v...
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Techniques are investigated for soft landing of manned and unmanned vehicles on moon;primary interest is terminal phase of landing just prior to touchdown, at which time final controlled decelerations are applied to vehicle;2 different guidance concepts for terminal phase are presented and guidance equations, sensor performance, and fuel requirements given;application of concepts to unmanned vehicle on direct descent trajectory and manned vehicle on approach trajectory from lunar parking orbit.
Automatic terminal guidance logic for rendezvous of 2 space vehicles in orbit, treating specifically phase between terminal acquisition and final docking;system, termed attenuated intercept, initiates intercept orbit,...
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Automatic terminal guidance logic for rendezvous of 2 space vehicles in orbit, treating specifically phase between terminal acquisition and final docking;system, termed attenuated intercept, initiates intercept orbit, softened by dilating time to intercept;characteristics of system were evaluated by computer simulations for noncoplanar elliptic relative orbits;ability of system to accommodate range of thrust levels is shown;multiple start nonthrottleable engines appear adequate for task.
Analytical studies were conducted to estimate target intensity and line-of-sight (LOS) angular rate (θ, mrad/sec) for rendezvous maneuvers with sun-illuminated satellites in a star field, and experiments provided est...
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A generic analysis of rigid-body docking dynamics from initial physical contact of the two spacecraft to final latching is presented The results can be used to estimate the reaction forces and torques on the main craf...
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Concept is suitable for space rendezvous missions, such as interrogation and possible negation of enemy satellites, maintenance and supply of space stations, and performance of space rescue;intermittent instrumentatio...
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Concept is suitable for space rendezvous missions, such as interrogation and possible negation of enemy satellites, maintenance and supply of space stations, and performance of space rescue;intermittent instrumentation of interceptor trajectory corrections;optimization procedures employed to achieve rendezvous in minimum time consistent with small fuel requirement and logic employed in system.
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