Abstract:

For the hypersonic vehicle nonlinear attitude mode in reentry process unpowered with a strong coupling, aerodynamic parameter perturbations and nondeterministic, combining extended state observer (ESO) and nonlinear law state error feedback (NLSEF) in the active disturbance rejection control (ADRC), the hypersonic vehicle inner and outer ADRC attitude controller are designed respectively. Interferences, such as uncertainty, coupling and parameter perturbations, are regarded as “the sum of interference”, the extended state observer is used to estimate and implement dynamic feedback compensation, and then the NLSEF is used to inhibit the compensating residual. ADRC controller is designed without a precise model of vehicle, and without precise perturbation boundaries of aerodynamic parameters.Simulation results show that the control system can overcome the impact of largescale perturbations of interference and aerodynamic parameters, which has good dynamic qualities, tracking capabilities, and strong robustness.