Research On The Control Of Composite Integral Sliding Mode Variable Structure In Rocket Launcher AC Servo System

The rocket artillery is the a tactical weapon that provides a large area of instantaneous dense firepower,it is mainly used for fast and destructive attack on large-area enemy cluster targets.With the development of modern rocket launcher towards high precision,long range,digitalization and rapid response,the control accuracy and performance of rocket artillery servo system need to be further improved.The time-varying and uncertain factors such as the change of control object and structure,the change of operation environment and environmental interference must be taken into account.Only in this way can satisfactory control effect be obtained.The main contents of this paper are follows:The system composition and working principle of an AC servo system for rocket launcher is introduced.Established a mathematical model for the permanent magnet synchronous motor used in the system.The non-linear and uncertain factors in the system are analyzed in detail,which lays a foundation for further research.Aiming at the non-linearity and strong disturbance of AC servo system of rocket artillery,combined with fractional calculus theory,the velocity loop composite integral sliding mode variable structure controller and position loop composite integral sliding mode variable structure controller are designed.Recursive least square method is used to identify the moment of inertia.An extended sliding mode disturbance observer is designed to ensure that the system has better control effect in the presence of strong external disturbances.In order to further improve the performance of AC servo system of rocket launcher,annealing genetic algorithm is introduced to optimize the design parameters of the controller.The validity of the proposed control method is proved by MATLAB/Simulink.In order to simulate the actual working status of the AC servo system of the rocket launcher,a hardware-in-the-loop simulation platform was built to carry out the experimental research on the control algorithm designed.The experimental results of the hardware-in-the-loop simulation platform verified the effectiveness and feasibility of the control method designed in this paper.