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A predictor-corrector guidance algorithm for use in high-energy aerobraking system studiesA three-degree-of-freedom predictor-corrector guidance algorithm has been developed specifically for use in high-energy aerobraking performance evaluations. The present study reports on both the development and capabilities of this guidance algorithm to the design of manned Mars aero-braking vehicles. Atmospheric simulations are performed to demonstrate the applicability of this algorithm and to evaluate the effect of atmospheric uncertainties upon the mission requirements. The off-nominal conditions simulated result from atmospheric density and aerodynamic characteristic mispredictions. The guidance algorithm is also used to provide relief from the high deceleration levels typically encountered in a high-energy aerobraking mission profile. Through this analysis, bank-angle modulation is shown to be an effective means of providing deceleration relief. Furthermore, the capability of the guidance algorithm to manage off-nominal vehicle aerodynamic and atmospheric density variations is demonstrated.
Document ID
19910034497
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Braun, Robert D.
(NASA Langley Research Center Hampton, VA, United States)
Powell, Richard W.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Astrodynamics
Report/Patent Number
AIAA PAPER 91-0058
Accession Number
91A19120
Distribution Limits
Public
Copyright
Other

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