Dynamic modeling and control of reentry warhead with hybrid actuators

In order to improve the impact accuracy and mobile penetration capability of reentry warhead, hybrid actuators with single control moment gyroscopes(SGCMGs)and moving masses were used to produce enough torque for attitude control during the whole reentry process. By applying the Newton-Euler's method, dynamic models of the reentry warhead with hybrid actuators were derived. Then the nonlinear attitude control system was designed for warhead based on Lyapunov theory. Simulation results show that hybrid actuators can satisfy the torque demand during reentry process, and output torque error is less than 0. 001 5 N·m. The control system tracks the attitude angle well, and stable tracking error is no more than 0. 5°. The attitude control strategy is feasible.