Coupling effect-triggered control strategy for hypersonic flight vehicles with finite-time convergence

This paper investigates a novel control strategy of addressing coupling issue for attitude tracking control of hypersonic flight vehicle. By using a defined coupling effect indicator which demonstrates whether a coupling harms or benefits the system, one finite-time coupling effect-triggered control scheme is proposed via applying the second-order sliding mode control technique. A specific nonlinear function is designed to implement the addition of beneficial couplings or removal of detrimental couplings. As a consequence, the proposed method establishes a unified couplings recognition and coupling effect-triggered control framework, which leads to a potential of improving the dynamic performance. The chattering attenuation is also involved for practical implementation. Finally, simulation results illustrate the validity of the proposed control scheme.