Research And Simulation Of The Cruise Missile Flight Trajectory Control

In modern battlefield, the cruise missile with its unique lethal and deterrence has played a central role. The cruise missile is an influential member of the tactical missiles, and is a kind of precision as the characteristics of high-tech weapons. At the same time, its high reliability and cost performance are valued by more and more countries. In order to achieve the objectives of precision strike for the cruise missile, a high-performance guidance and control systems should be developed. The development of new and high technology promotes the social progress; a large number of exceptional control methods in missile guidance are also emerged. The missile model has the character of nonlinear and strong coupling; three different control methods and control structures were designed in this thesis for its flight trajectory in the horizontal direction and the advantages and disadvantages of each method were also compared through MATLAB simulation.Firstly, the mathematical model was analysized under the relevant coordinates based on the physical mechanism of cruise missiles and the simulation model was established, taking into account the need for the actual flight of the cruise missile, the steering gear and the rate gyro systems are joined into the system.Select the representative of classical control theory PID control as the first control method. Three linear channels are separated for the established mathematical model, and PID controller was designed in a small perturbation and short cycle conditions. Optimization tools of Simulink were used to optimize the parameters of the controller, and the time is saved.Select modern control theory variable structure control method as the second control method, according to the publishing thesises sliding mode variable structure control has a better control effect for the nonlinear systems. In this thesis, sub-channel design method was designed for each channel by the mechanism of the cruise. Double variable control structure was especially designed for vertical channel and lateral channel to improve the stability of the system.The new control method of MTN (multi-dimensional Taylor network) was used as the third control method. MTN controller was designed in this thesis in full control channel. The principle of minimum to get the optimal control signal of the controlled model and the conjugate gradient method to optimize MTN control parameters was introduced. Because of the limited time, MTN controller was designed based on PID control.MATLAB was used to establish the simulation platform, and a graphical user interface system was also designed by the tool of GUI. The control effect of three control methods was compared without the wind. Engineering wind model was established, and the effects of three control methods were compared under the wind interference again. Under the same conditions, the result shows that PID control has little effect on a big disturbance. The variable structure control has the problem of stability for the disturbance and the MTN control has the best control effect for the disturbance.Finally what had done was concluded, at the same time the outlook for further follow-up work was offered.