Robust constrained autopilot control for a generic missile in the presence of state and input constraints

A robust constrained autopilot control is addressed for a generic missile subject to angle of attack constraint, actuator nonlinearities and matched and mismatched uncertainties by utilizing integral barrier Lyapunov functional (IBLF) technique and dynamic surface control (DSC). Comparing with the existing IBLF-based literatures, the exploited methodology not only ensures the state constraint satisfaction, but also tackles the actuator limitations which include magnitude, rate and width constraints by introducing an auxiliary compensation design. For the problem of matched and mismatched uncertainties, an extended state observer (ESO) is explicitly utilized. Rigorous proofs are derived to demonstrate that the constrained state remains in its compact set and the closed-loop system achieves uniform ultimately bounded stability. Finally, Simulation results are performed to verify the effectiveness of the proposed approach.