Robust global stabilization of spacecraft rendezvous system via gain scheduling |
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Authors: | Qian Wang Guang-Ren Duan |
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Affiliation: | Center for Control Theory and Guidance Technology, Harbin Institute of Technology, Harbin 150001, China |
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Abstract: | The problem of robust global stabilization of a spacecraft circular orbit rendezvous system with input saturation and inputadditive uncertainties is studied in this paper. The relative models with saturation nonlinearity are established based on Clohessey-Wiltshire equation. Considering the advantages of the recently developed parametric Lyapunov equation-based low gain feedback design method and an existing high gain scheduling technique, a new robust gain scheduling controller is proposed to solve the robust global stabilization problem. To apply the proposed gain scheduling approaches, only a scalar nonlinear equation is required to be solved. Different from the controller design, simulations have been carried out directly on the nonlinear model of the spacecraft rendezvous operation instead of a linearized one. The effectiveness of the proposed approach is shown. |
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Keywords: | Robust global stabilization spacecraft rendezvous system parametric Lyapunov equation input saturation inputadditive uncertainties gain scheduling |
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