Robust H-two/H-infinity orbit control for intercepting spacecraft with control input constraint

A robust H-two/H-infinity orbit controller is proposed for intercepting satellite with parametric uncertainties,external disturbances and control input constraint.First,we build the relative model and formulate the relative constraints by considering all factors including uncertainties,disturbances,system H-two/H-infinity and finite-time performances,input constraint and pole placement.Then,we derive the sufficient conditions of controller by using the linear matrix inequality technology,transforming the controller design to a convex optimization problem.Simulation results show that the system is asymptotically stable with good robustness and high disturbance attenuation,and satisfies all the constraint requirements.