Control strategies for stable orbits around Phobos.

Control strategies for stable orbits around P ...
Stephen Takacs, Stephen Takacs
Locate

My Reading Lists:

Create a new list



Buy this book

Last edited by WorkBot
January 24, 2010 | History

Control strategies for stable orbits around Phobos.

This study compares four control laws for stationkeeping around Phobos. The dynamics of the Mars-Phobos system are constrained to the synodical plane of the circular restricted three-body problem (CRTBP) with Phobos modelled as an ellipsoid. A novel method of determining the necessary conditions for periodic orbits is formulated through nonlinear optimization techniques. The optimization algorithm is a Nelder-Mead simplex and is shown to outperform any gradient-based methods as well as other techniques for determining such orbits. Two controllers, constant feedback and scheduled, are developed from the algebraic Riccati equation. These controllers are then compared to the optimal solution which uses the time-varying Riccati equation. A fourth controller is developed based on a Floquet-Lyapunov transformation of the system. At high orbits, the periodicity of the linearized system is very small and the optimal controllers perform equally well. As periodicity increases with closer orbits, time-varying feedback becomes necessary for increased controller performance.

Publish Date
Language
English
Pages
76

Buy this book

Book Details


Edition Notes

Source: Masters Abstracts International, Volume: 44-02, page: 0955.

Thesis (M.A.Sc.)--University of Toronto, 2005.

Electronic version licensed for access by U. of T. users.

GERSTEIN MICROTEXT copy on microfiche (1 microfiche).

The Physical Object

Pagination
76 leaves.
Number of pages
76

Edition Identifiers

Open Library
OL19216101M
ISBN 10
0494070927

Work Identifiers

Work ID
OL12683155W

Community Reviews (0)

No community reviews have been submitted for this work.

Lists

History

Download catalog record: RDF / JSON
January 24, 2010 Edited by WorkBot add more information to works
December 11, 2009 Created by WorkBot add works page