Abstract
Based on the inherent coupling of system states, backstepping controllers are designed for underactuated spacecraft hovering without either the radial or in-track thrust and in the presence of input saturation and unmatched disturbances. Feasible hovering positions for either saturated underactuated case are derived. A Lyapunov-based approach is used to prove the asymptotical convergence of state errors and system robustness against unmatched disturbances. The validity of theoretical analysis is verified by simulations in a J2 -perturbed environment.
Funding Information
  • National Natural Science Foundation of China (61690213, 11502288)
  • Fund of Innovation by Graduate School of National University of Defense Technology (B140106)
  • Hunan Provincial Innovation Foundation for Postgraduate (CX2014B006)

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