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Dynamics modeling and control system design for the reentry warhead controlled by single moving mass

As one of the control actuator, the configuration moving mass is an important problem in engineering application for moving mass control technology. The translational and rotational motion of the missile is affected by the servo forces which drive the moving mass to move. It increases not only the difficulty of the missile dynamics analysis and the layout parameters design, but also the difficulty of the guidance and control loop design. Firstly, a new configuration of moving mass actuator, which consists of the rotary rail and a single moving mass that can move along the rail, is presented. Then, the system dynamic model is established and the coupling characteristics between the attitude control and the servo loop control are analyzed in this paper. According to the above analysis, the attitude tracking control law is designed based on sliding mode theory. Finally, to track the commanded overload in the terminal guidance stage, the validity of the proposed control system is demonstrated by numerical simulation.