Longitudinal model for airbreathing hypersonic vehicle with variable geometry inlet( AHV-VGI) is established. Aiming at problem that longitudinal model has some features such as uncertainties introduced by parameters fitting and translating cowl
and unknown external disturbance
a dynamic surface control( DSC) scheme for AHV-VGI based on fuzzy disturbance observer( FDO) is proposed. Simulation results demonstrate that the scheme can effectively control AHV-VGI system
and illustrate the control performance of AHV-VGI system is better than fixed geometry inlet airbreathing hypersonic vehicle( AHV-FGI) system.