Robust Saturated Finite-time Output Feedback Attitude Stabilization for Rigid Spacecraft

QL Hu, B Jiang (Harbin Institute of Technology, China) & MI Friswell (Swansea University)

Journal of Guidance, Control, and Dynamics, Vol. 37, No. 6, November 2014, pp. 1914-1929


This paper investigates the velocity-free feedback control problem associated with finite-time attitude stabilization of a rigid spacecraft subject to external disturbance and input saturation. First of all, to address the lack of angular velocity measurement, a novel fast finite-time convergent observer is proposed to recover the unknown angular velocity information in a finite time under external disturbance. Then, a finite-time output feedback controller is proposed using the designed finite-time observer, in which the control input saturation nonlinearity is explicitly considered in the proposed finite-time stabilizer. Rigorous proofs show that the proposed observer can achieve finite-time stability, the controller rigorously enforces actuator-magnitude constraints and the attitude of the rigid spacecraft will converge to the equilibrium in a finite time. Numerical simulations illustrate the spacecraft performance obtained using the proposed controllers.

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This material has been published in the Journal of Guidance, Control, and Dynamics, Vol. 37, No. 6, November 2014, pp. 1914-1929. Unfortunately the copyright agreement with AIAA does not allow for the PDF file of the paper to be available on this website. However the paper is available from AIAA - see the link below.

Link to paper using doi: 10.2514/1.G000153

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