Low-complexity hypersonic flight control with asymmetric angle of attack constraint

Abstract

This study investigates the longitudinal flight control problem of air-breathing hypersonic vehicles subject to the asymmetric angle of attack (AoA) constraint. With the help of introduced tangent errors, the proposed control becomes low complexity in both structure and expression, especially for the non-adaptive control algorithm in the altitude loop. The asymmetric AoA constraint, which is more practical in comparison with the previously considered symmetric AoA constraint, is well accommodated. Output tracking errors are regulated into small residual sets within the designated convergence time. Uncertain aerodynamic coefficients, structural flexibilities and scramjet input saturation are synthetically handled, making the proposed control competent for a real hypersonic flight mission.