Accession Number : AD0266591

Title :   GUIDANCE AND CONTROL DURING DIRECT-DESCENT PARABOLIC REENTRY

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s) : FOUDRIAT,EDWIN C. ; WINGROVE,RODNEY C.

Report Date : NOV 1961

Pagination or Media Count : 1

Abstract : Four guidance and control techniques applicable to the reentry from parabolic orbits of vehicles having low lift-drag ratios are described. Techniques include pilot and automatic control to a reference trajectory and the use of prediction to improve and simplify guidance procedures. Comparison between systems is made and areas where further study may be profitable are indicated.

Descriptors :   *ATMOSPHERE ENTRY, *CONTROL, *GUIDANCE, *REENTRY VEHICLES, ANALOG COMPUTERS, AUTOMATIC, COMPUTER LOGIC, CONTROL SYSTEMS, FLIGHT SIMULATORS, GUIDED MISSILE TRAJECTORIES, LINEAR SYSTEMS, LUNAR PROBES, MANNED, MATHEMATICAL PREDICTION, ORBITS, SPACE FLIGHT

Distribution Statement : APPROVED FOR PUBLIC RELEASE