Document Type

Article

Publication Date

2010

Publication Title

Journal of Guidance, Control, and Dynamics

Abstract

An 8 degree-of-freedom model is developed that accurately models relative pitching and yawing motion of a payload with respect to a parafoil. Constraint forces and moments are found analytically rather than using artificial constraint stabilization. A turn rate controller common in precision placement algorithms is used to demonstrate that relative yawing motion of the payload can result in persistent oscillations of the system. A model neglecting relative payload yawing failed to predict the same oscillations. It is shown that persistent oscillations can be eliminated by reduction of feedback gains; however, resulting tracking performance is poor. A reduced order linear model is shown to be able to adequately predict relative payload dynamics for the proposed turn rate controller on the full 8 degree-of-freedom system.

Volume

33

Issue

1

First Page

116

Last Page

125

Comments

Originally published by the Journal of Guidance, Control, and Dynamics, Vol 33, No 1, pp 116-125, 2010.

http://arc.aiaa.org/loi/jgcd

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