Robust Low-Cost Sliding Mode Overload Control for Uncertain Agile Missile Model

Robust low-cost overload control based on sliding model control are designed for the uncertain agile missile model. For agile missile, actuator dynamics is not negligible. Taking dynamics of the first-order actuator into consideration, both the difficulties and costs of the control system are augmented. The paper designs a robust overload controller with a low-cost actuator, where the sliding model surface consists of the longitudinal overload and its derivatives. The relationship between the longitudinal overload and pitch rate is derived, and the overload signal and its derivatives are further replaced by pitch rate and pitch acceleration for convenience in engineering. Lyapunov V-function method is employed to ensure the robust asymptotic stability. Finally, simulation results are presented to show the effectiveness of the design methods