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Application of System Identification to Parachute ModelingA series of exact analytical solutions is developed for a capsule with two parachutes to verify CAPDYN and FAST results for terminal conditions. The case described herein is for the capsule and two parachutes acting as a fixed system in terminal descent. In this simplest case, the density is modeled as a constant defined by the initial release altitude. The analytical solution predicts the system terminal dynamic pressure, velocity, and altitude for comparison with CAPDYN and FAST simulation results.




Document ID
20190032137
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Murri, Daniel G.
(NASA Langley Research Center Hampton, VA, United States)
Morelli, Eugene A.
(NASA Langley Research Center Hampton, VA, United States)
Pei, Jing
(NASA Langley Research Center Hampton, VA, United States)
Roithmayr, Carlos M.
(NASA Langley Research Center Hampton, VA, United States)
Matz, Daniel A.
(NASA Johnson Space Center Houston, TX, United States)
Barton, Richard L.
(Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Date Acquired
October 18, 2019
Publication Date
October 1, 2019
Subject Category
Engineering (General)
Report/Patent Number
NASA/TM-2019-220410/Volume II
NESC-RP-15-01037
L-21062
NF1676L-34601
Funding Number(s)
WBS: 869021.05.07.12.01
Distribution Limits
Public
Copyright
Public Use Permitted.
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