Loitering Missile Flight Control System Design Based On Fuzzy Control Method With Simulation Studies

With the development of science and technology, wars in future will be highly informationized, cruise munition as the combination of unmanned aerial vehicles and ammunition technology is leading an important trends in the development of information weapons.Cruise munition not only can attack the enemy precisely and effectively, but also can be capable of taking battlefield reconnaissance and surveillance, battle damage assessment, communication and radio relay and other single or multiple tasks. Design of cruise munition flight control system is critical to the successful completion of these tasks.This thesis takes a certain type of cruise munition for the study. Based on the fuzzy control method, cruise munition flight controllers are designed and simulated.Firstly,the research and development status of cruise munition and flight control system at home and abroad are summarized in this thesis. The common coordinate systems and conversion formulas used to describe cruise munition space motion are established. Baesd on the adequate analysis of force and torque loading on cruise munition, mathematical models of the cruise munition-space movement are established,and then mathematical model,with small disturbance theory, decouplied to be loitering missile vertical linear equation of motion and lateral linear equations of motionSecondly, this thesis introduces general PID ontrol method and parameter tuning methods, thoroughly analyzes the basic theory of fuzzy control method and control characteristics, studies on design method of fuzzy-PID controller.Finally, based on conventional PID control and fuzzy control methods, longitudinal flight controllers are designed, including conventional PID controller, fuzzy PID controller with mixed fuzzy PID controller. Simulation research runs under the simulation environment of Matlab/simulink. Simulation results show that Fuzzy controllers meet the performance requirements, with fast response, good adaptability and robusticity.