Robust global disturbance rejection of spacecraft rendezvous system via gain scheduling

The paper proposed a nonlinear continuous static gain scheduled controller for the spacecraft circular orbit rendezvous system with input saturation, input-additive uncertainties and external disturbances by combining the parametric Lyapunov equation-based low gain feedback design method and gain scheduling technique. The relative models are established based on C-W equation. To apply the proposed gain scheduling approaches, only a scalar nonlinearity equation is required to be solved. Especially, the simulations have carried out directly on the nonlinearity model of the spacecraft rendezvous instead of a linearized one show the effectiveness of the proposed approach.