Re-Entry Attitude Two-Loop SMC Control and Rudders-Nozzles Blending Selection Allocation of RLV

The re-entry attitude control method of reuse launch vehicle was designed based on the sliding mode control(SMC) theory in this paper.Both the angular velocity and shuttle orientation angles were tracked by double-loop SMC simultaneously.According to the hybrid controlling characteristic of the aerodynamic surfaces and reaction control system of the RLV,the control torque commands were sent into the actuators by using the optimal control selection allocation algorithm,which were executed by the dynamic plane and reaction actuator.The simulation results showed that the method was robust and the de-coupled tracking performance could be acquired.