A model reference decoupling control method for hypersonic vehicles

A model reference control plus dynamic inversion method is presented for nonlinear attitude dynamics of hypersonic vehicles under re-entry model uncertainties and external distubances. The dynamics is separated into fast and slow loops as angular velocity and attitude angular in terms of singular perturbation theory. Out-loop gets the simple analytical control laws based on second order model reference adaptive control theory, to suppress attitude kinematics couping and external distubances without inversion compute. In-loop system is affine in control with mighty couping aerodynamic coefficients, control vector is solving explicitly by nonlinear dynamic inversion, the desired dynamics is designed proportional plus integral dynamics form, to improve system robustness. The adaptive anti-windup is designed for inputs constraints. Lastly, Simulation result demonstrates the effectiveness of proposed method.