Title page for ETD etd-07242001-133151

Type of Document Master's Thesis
Author Makovec, Kristin Lynne
Author's Email Address kmakovec@vt.edu
URN etd-07242001-133151
Title A Nonlinear Magnetic Controller for Three-Axis Stability of Nanosatellites
Degree Master of Science
Department Aerospace and Ocean Engineering
Advisory Committee
Advisor Name Title
Hall, Christopher D. Committee Chair
Kasarda, Mary E. F. Committee Member
Lutze, Frederick H. Jr. Committee Member
  • Spacecraft Attitude Dynamics
  • Magnetic Control
  • Three-Axis Stability
Date of Defense 2001-07-12
Availability unrestricted
The problem of magnetic control for three-axis stability of a spacecraft is examined. Two

controllers, a proportional-derivative controller and a constant coefficient linear quadratic

regulator, are applied to the system of equations describing the motion of the spacecraft.

The stability of each is checked for different spacecraft configurations through simulations,

and the results for gravity-gradient stable and non gravity-gradient stable spacecraft are

compared. An optimization technique is implemented in an attempt to obtain the best

performance from the controller. For every spacecraft configuration, a set of gains can be

chosen for implementation in the controller that stabilizes the linear and nonlinear equations of motion for the spacecraft.

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