Abstract:

A nonlinear disturbance observer (NDO)based dynamic inverse tracking controller is proposed for the near space interceptor with reaction jets and aerodynamic force. Firstly, an NDO is proposed to estimate the mismatched disturbance, and a feedforward compensator based on the disturbance estimated value is designed to effectively remove the effect of the external disturbance. Based on the NDO, a dynamic inverse composite controller is constructed to derive the desired control moment. Then, the desired control moment is allocated to the aerodynamic fins and the reaction jets using the dynamic control allocation method. Finally, simulation results show that the proposed control scheme can track the overload command with high precision, and it is applicable to the blended control of the near space interceptor.