Research On Fighter Dynamics Modeling And Maneuvering Decision For Air Threat Targets

With the development and progress of weapons and equipment,simulation research for aircraft air combat is becoming more and more significant.Air combat simulation can not only test the extreme performance of the aircraft,but also simulate some complex situations,and can improve the combat capabilities of air force pilots.This article focuses on the establishment of fighter maneuver library and maneuver decision-making in air combat.Aiming at the problem of fighter dynamics modeling,a modular idea is adopted to establish a 6-DOF fighter model.Compared with the 3-DOF model,the simulation granularity of the six-degree-of-freedom model is more refined,which can not only take into account the attitude restrictions of the aircraft,but also simulate the flight state more realistically.Aiming at the problem of establishing a library of aircraft maneuvers,a method of relying on automatic pilot controllers to achieve basic maneuvers is proposed.The pole placement technique is used to calculate the feedback gain of the pilot controller.The simulation results show that the aircraft model can make corresponding maneuvers according to different control parameters.In order to enhance the robustness of the maneuver decision algorithm,the guidance law of the incoming missile is optimized.Aiming at the problem that the air-to-air missile guided by proportional guidance law has poor attacking effect on large maneuvering target,an algorithm is proposed to introduce the line of sight angular acceleration and the missile acceleration at the last moment into the guidance law.The simulation results show that the attacking effect of the optimized guidance law on large maneuvering target is obviously better than that of proportional guidance law.Aiming at the maneuver decision-making problem based on the optimized guidance law,a missile position hybrid prediction model combining Kalman filtering and guidance law is proposed.At the same time,the principles of statistics are introduced to improve the calculation criteria of situation information,and the maneuver control parameters and maneuver time are used to estimate the position of the aircraft.According to the Lagrange multiplier,the optimal maneuver and the corresponding control parameters are calculated.Experiments show that the maneuver decision algorithm is better than the traditional 3/9 maneuver.After completing the decision algorithm modeling,the flight simulation system is constructed based on Qt and OSGEarth architecture,and the algorithm is integrated and verified by the simulation situation plotting system.Experiments show that when the initial distance between the aircraft and the missile is close,the decision algorithm can improve the missile miss distance and prolong the hit time,but it is difficult to avoid the incoming missile;when the aircraft is against the missile launched at the edge of range,the decision algorithm can help the aircraft avoid the incoming missile.Compared to maneuvering according to the 3/9 principle,the maneuvering chain planned by this decision algorithm is more effective.