Title:
A Comparison of Three Algorithms for Orion Drogue
Parachute Release
A Comparison of Three Algorithms for Orion Drogue
Parachute Release
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Author(s)
Matz, Daniel A.
Advisor(s)
Braun, Robert D.
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Abstract
The Orion Multi-Purpose Crew Vehicle is susceptible to flipping apex forward between
drogue parachute release and main parachute inflation. A smart drogue release algorithm
is required to select a drogue release condition that will not result in an apex forward main
parachute deployment. The baseline algorithm is simple and elegant, but does not perform
as well as desired in drogue failure cases. A simple modification to the baseline algorithm
can improve performance, but can also sometimes fail to identify a good release condition.
A new algorithm employing simplified rotational dynamics and a numeric predictor to
minimize a rotational energy metric is proposed. A Monte Carlo analysis of a drogue failure
scenario is used to compare the performance of the algorithms. The numeric predictor
prevents more of the cases from flipping apex forward, and also results in an improvement
in the capsule attitude at main bag extraction. The sensitivity of the numeric predictor to
aerodynamic dispersions, errors in the navigated state, and execution rate is investigated,
showing little degradation in performance
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Date Issued
2014-04-28
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Resource Type
Text
Resource Subtype
Masters Project
Rights Statement
Unless otherwise noted, all materials are protected under U.S. Copyright Law and all rights are reserved