Study On Moving Mass Control Method For Reentry Warhead

It is important for ballistic missiles to achieve ending maneuver ability as the development of interception and anti-interception technique, which can enhance the ability of missile's anti-interception and improve the ending attack precision greatly.The paper research on the attitude control approach for a reentry warhead controlled by the way of moving mass. The moving-mass-center control approach is a new concept way to control the missile. The attitude control method is deeply studied based on the concerned mathematical model of the system.Firstly, the concerned coordinate systems used in the research are given. Based on the momentum theory, the dynamic equations of the reentry warhead with moving mass are derived..Secondly, the attitude control model is simply developed. Under the control model, the attitude control law is designed: expected controlling torque is calculated using sliding variable structure control, and then the position of the moving mass is derived by quadratic planning solved the coupling control problem.Finally, the attitude control simulation control of the reentry warhead is set up in the computer. The results show that the designed attitude control law, based on the sliding variable structure control and quadratic planning method, can adapt to effectively control the aircraft and satisfy the attitude control precision demand.