基于模型参考自适应的大气层外杀伤拦截器姿态控制系统设计

Vector nozzle is used for attitude and inertial navigation control in guidance and control system of atmospheric kill interceptor. The switching characteristics of the system output are strongly non-linear. At the same time, the sudden change of attitude angle command will bring about the sudden change of control moment command. It is required that the rapid adjustment of attitude angle command can be realized, and attitude control trigger should be considered. In order to solve the above problems, this paper designs an attitude angle tracking controller, which uses dead-time hysteretic relay control law with advanced correction for switching control. It also uses variable structure model reference adaptive method for continuous control law design to improve the efficiency of switching controller and reduce work energy consumption. The simulation results show that the proposed method is faster and more accurate than the comparative method. The Monte Carlo simulation results show that the interception accuracy of the proposed method is 0.44 m, which is much better than that of the comparative interception method. To sum up, this method can track the command attitude angle with faster response and smaller overshoot. The amount of jet used in attitude control engine is reduced effectively, which has a certain guiding role for engineering practice.