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

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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 IPACS 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.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611-6250, USA

    D. Kim, N. Fitz-Coy & W. E. Dixon

  2. Air Force Research Laboratory, Eglin AFB, FL, 32542, USA

    W. MacKunis

Authors
  1. D. Kim
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  2. W. MacKunis
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  3. N. Fitz-Coy
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  4. W. E. Dixon
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Correspondence to D. Kim.

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Kim, D., MacKunis, W., Fitz-Coy, N. et al. Precision Integrated Power and Attitude Control System (IPACS) in the Presence of Dynamic Uncertainty. J of Astronaut Sci 58, 99–120 (2011). https://doi.org/10.1007/BF03321161

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