| As the most important guidance weapon,the missile has become the main character of the modern battlefield.The missile control system plays an important role in striking the target precisely and controlling the missile's stability.In the research of missile control,PID control is one of the earliest control strategies,and its most prominent advantage is that the algorithm is simple,robust and reliable.However,the traditional PID control also has its limitations.Firstly,PID control theory can only be used in the control system of fixed parameters;secondly,it can only be used in the control object which is nonlinear,large inertia and strong interference.Therefore,the application of PID control is limited in missile controlling.In recent years,researchers derived a variety of control algorithms.But those control methods cannot improve the performance of the system comprehensively,and even make the system's individual indicators difficult to achieve the engineering standards.Under this research background,this paper proposes a special variable coefficient PID control method,and mainly has the following work:Firstly,briefly introduced the background and significance of this research,and introduced the main contents of this paper;Secondly,established the mathematical model of a cruise missile and introduced the conversion between different coordinates,then established the dynamic model of the missile according to some simplification principles;Thirdly,introduced the principle of PID controller and verified its control effect through simulation;Then,introduced the control method of this study,which is a special kind of variable coefficient PID control method,and compared with the original control system.On this basis,used this method to simulate a simple two-order system;finally,applied this method to the missile's longitudinal control,and compared with the traditional PID control method,then verified its effectiveness through simulation. |
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