The Research On Modeling And Autopilot Design Of Long Range Air To Air Missile

In modern warfare,the strategic role of early warning aircraft is becoming more and more prominent.With the increasing distance of early warning aircraft,it is difficult to attack the task.Long-range air-to-air missile as an effective means of countering long-range early warning aircraft,has been more and more attention by the military countries.In order to effectively improve the strike accuracy of long-range air-to-air missile,it is of great significance to carry out the research of airborne missile advanced autopilot.In the process of air-to-air missile combat,the flight envelope range is large,the trajectory parameters change drastically,and the aerodynamic parameters are more uncertain.In view of these problems,Establish a more accurate air-to-air missile mathematical model which has high control precision and Strongly robust overloading autopilot has become a key issue for air-to-air missiles.Therefore,this paper takes the design process of long-range air-to-air missile and overloaded autopilot as the research background to carry out long-range air-to-air missile dynamics and aerodynamic modeling research and the design of advanced overload autopilot.The specific work of this paper is as follows:1.the establishment of the paper used in the relevant mathematical model.Including the mathematical model of air-to-air missile(mathematical model of centroid motion and mathematical model of centroid motion),the mathematical model of target motion,the relative motion model of missile and target,and the model basis for the follow-up autopilot design.2.Based on the engineering estimation method,we establish the aerodynamic model of air-to-air missile,calculate the aerodynamic force and torque coefficient,mass parameter,pressure center of air-to-air missile and the aerodynamic coefficients of air-to-air missile,carry out the three-degree-of-freedom ballistic simulation.provides a trajectory basis for the autopilot's feature point selection.3.To carry out airborne missile overload autopilot design research.Design two autopilot: a.Based on the poles configuration of the two-loop PI autopilot,the three-channel dynamic decoupling linearization method of air-to-air missile is given.Then,based on the PI design and principle of pole configuration,combined with the selected trajectory feature points Overload tracking simulation results;b.Based on the integrated robust autopilot,robust robustness analysis is used to design the controller structure,robust stability analysis is carried out,and the robust autopilot is designed by ? synthesis method.The simulation results show that the two autopilots are designed to meet the design requirements.