Precision Integrated Power and Attitude Control System (IPACS) in the Presence of Dynamic Instability

D. Kim, W. MacKunis, N. Fitz-Coy, W. E. Dixon

Research output: Contribution to journalArticlepeer-review

Abstract

An adaptive robust integrated power and attitude control system (IPACS) is presented for a variable speed control moment gyroscope (VSCMG)-actuated satellite. The developed IP ACS method is capable of achieving precision attitude control while simultaneously achieving asymptotic power tracking for a rigid-body satellite in the presence of uncertain friction in the VSCMG gimbals and wheels. In addition, the developed controller compensates for the effects of uncertain, time-varying satellite inertia properties. Some challenges encountered in the control design are that the control input is premultiplied by a nonsquare, time-varying, nonlinear, uncertain matrix and is embedded in a discontinuous nonlinear. Globally uniformly ultimately bounded attitude tracking and asymptotic power tracking results are proven via Lyapunov stability analyses, and simulation results are provided to demonstrate the performance of the controller.
Original languageAmerican English
JournalThe Journal of the Astronautical Sciences
Volume58
DOIs
StatePublished - Jan 2011
Externally publishedYes

Keywords

  • attitude control
  • control input
  • wheel speed
  • adaptive estimate
  • control moment gyroscope

Disciplines

  • Aerospace Engineering

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