Disturbance observer based model predictive control for autopilot design of bank-to-turn missiles

The attitude control performance of the bank-to-turn (BTT) missiles are severely interrupted by heavy nonlinear crossing couplings, time-varying aerodynamic parameters, and external disturbances. A distributed composite control framework consisting of a high-level model predictive control, a low-level state feedback stabilizer, and a feedforward compensation based on disturbance observer is proposed in this article for the BTT missile autopilot design. The simulation results demonstrate that the proposed control strategy exhibits promising abilities against external disturbances, nonlinear crossing couplings and aerodynamic parameter perturbations.