Attitude control of hypersonic morphing aircraft based on incremental backstepping sliding mode

Abstract

In order to ensure the attitude stability of hypersonic morphing aircraft in the deformation process, an attitude control scheme based on incremental backstepping sliding mode is proposed for the six-degree-of-freedom model of hypersonic morphing aircraft with nonlinear, strong coupling and external disturbance. The incremental backstepping sliding mode controller is designed based on the idea of incremental nonlinear dynamic inversion, and the external disturbance is compensated by combining the extended state observer. The effectiveness of the aircraft attitude control scheme based on incremental backstepping sliding mode is verified by numerical simulation. The simulation results show that the designed incremental backstepping sliding mode controller can eliminate the chattering phenomenon and ensure the attitude control performance of hypersonic morphing vehicle during deformation.