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Guidance and Control During Direct-Descent Parabolic ReentryThe results of studies of four reentry guidance and control techniques for the energy management of vehicles returning to the earth at escape speeds are compared in this paper. The reentry trajectories are constrained to those of direct descent, that is, where the vehicle does not leave that portion of the atmosphere where useful aerodynamic forces are available after its initial entry. The guidance techniques compared are: (1) a piloted simulator study reference trajectory techniques; 2) An automatic controller using reference trajectory techniques; 3) A predictor system employing linear prediction (perturbation) techniques; and 4) A repetitive prediction system employing rapid-time computer techniques.
Document ID
20040008247
Acquisition Source
Ames Research Center
Document Type
Other - NASA Technical Note (TN)
Authors
Foudriat, Edwin C.
(NASA Langley Research Center Hampton, VA, United States)
Wingrove, Rodney C.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 21, 2013
Publication Date
November 1, 1961
Subject Category
Aircraft Stability And Control
Report/Patent Number
L-1762
NASA-TN-D-979
Meeting Information
Meeting: NASA-Industry Appollo Technical Conference
Location: Washington, DC
Country: United States
Start Date: July 18, 1961
End Date: July 20, 1961
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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