Six-Degree-of-Freedom Model of a Controlled Circular Parachute
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Authors
Dobrokhodov, Vladimir N.
Yakimenko, Oleg A.
Junge, Christopher J.
Subjects
AGAS
Advisors
Date of Issue
2003
Date
May-June 2003
Publisher
Language
Abstract
The paper continues a series of publications devoted to modern advances in aerodynamic decelerator system
technology started recently (Journal of Aircraft, Vol. 38, No. 5, 2001) and addresses the development of a sixdegree-
of-freedom model of a guided circular parachute. The paper reviews existing circular parachute models
and discusses several modeling issues unresolved within the frame of existing approaches or completely ignored so
far. These issues include using data obtained in the aerodynamic experiments and computational- uid-dynamics
modelingfor both undistorted (uncontrolled) and distorted (controlled) canopy shapes, introducing andcomputing
control derivatives, and providing comparison with the real ight data. The paper provides step-by-step development
of the mathematical model of circular parachute that includes the basic equations of motion, analysis and
computation of the aerodynamic forces and moments, and investigation with modeling of special modes observed
in ight. It then introduces a new application of a two-step aerodynamic parameters identi cation algorithm that
is based on comparison with two types of the air-drop data (uncontrolled set and controlled one). The paper ends
with summary of the obtained results and proposes a vital direction for the further elaboration of the developed
model.
Type
Article
Description
The article of record as published may be located at http://dx.doi.org/10.2514/6.2002-4613
Series/Report No
Department
Organization
Aerodynamic Decelerator Systems Center (ADSC)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Dobrokhodov, V.N., Yakimenko, O.A., and Junge, C.J., “Six-Degree-of-Freedom Model of a Controlled Circular Parachute”, AIAA Journal of Aircraft, vol.40, no.3, 2003, pp.482-493.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.