Abstract:In order to satisfy various constraints in the reentry process of the aerospace vehicle, the attitude control of the reentry phase is studied. Taking HORUS-2B aircraft as the research object, a longitudinal nonlinear model is established according to the rudder deflection characteristics of the aircraft, by analyzing the constraints of the reentry process and choosing the appropriate initial angle of attack, the switching control law is designed, through combination of classical control and fuzzy control, the control parameters are tuned and verified by simulation. The simulation results show that the control system can control angle of attack and overload well, and has good robustness to restrain the influence of uncertainty.