Design of Dynamic Allocation of Overload Command for Orbital Blended Control Missile with Thrust and Aerodynamics

To allocate the control commands between the direct force and aerodynamics and to ensure a better tracking effect in the blended control system, we propose an overload-command dynamic-allocation strategy. First, we establish a mathematical model of the pitching channel in the orbital blended control missile in which the direct force and aerodynamic actuator are decoupled. The dynamic and coordinated allocation strategy for the direct force and aerodynamics is designed using the first-order derivative of the overload command. Secondly, considering the attitude change of the missile body during aerodynamic overload tracking, we designed a sliding mode controller to track the aerodynamic overload and stabilize the attitude of the missile. Our simulation results show that the actuator can quickly track the given overload command using the designed allocation strategy and the tracking accuracy is improved fourfold in comparison with that of the current hard switch strategy.