Research On Near Space Interception Guidance Technology Based On Hypersonic Platform

At present,the United States and Russia have carried out their own hypersonic vehicle project research,and gradually formed combat effectiveness.With the service of new hypersonic weapons,air defense and antimissile systems are facing great challenges.In order to effectively intercept hypersonic vehicles,this paper proposes a conceptual scheme of hypersonic missile against near space target based on air breathing hypersonic interception platform,and carries out preliminary research and reliability verification of key interception guidance technology.It is divided into the following partsFirstly,for the anti-hypersonic missile of the hypersonic interceptor platform,the concept of its composition and layout and defense operation flow are introduced in detail.The dynamic and relative kinematics modeling of interceptor platform and interceptor are completed for different combat environments.In the aspect of trajectory tracking and prediction,the maneuverability of near space vehicle leads to the low accuracy of trajectory tracking and prediction.Considering that the tracking effect of a single model is not satisfactory,this paper introduces IMM algorithm and uses multiple Kalman filters with different maneuvering models for tracking.On this basis,in order to solve the problem of trajectory prediction without lift drag coefficient,the corresponding prediction model is established based on the balanced gliding characteristics,and the least square method and inter cell constant method are used for noise reduction and parameter identification of prediction model,so as to obtain relatively accurate prediction of target flight trajectory.In the process of predicted impact point planning,considering that the flight strategy of the air-breathing interceptor platform is different from that of the rocket power interceptor,the traditional design method for the planning of predicted impact point is not applicable.Thus,the research on the design method for the planning of predicted impact point for air-breathing hypersonic platform is carried out.Firstly,based on the principle of maximum intercepting airspace,the nominal trajectories of hypersonic intercepting platform is constructed with the air-breathing dynamic flight strategy.Then,the problem of iterative intercept points,which satisfying multiple constraints is transformed into the problem of iterative intercept time based on range constraints and the filtering process of filtering out the intercept points that meet the high constraint.In the midcourse guidance,the traditional guidance method is not suitable considering the air-push coupling characteristic of the air-breathing hypersonic intercepting platform and the special working condition of the Ramjet.In this paper,a new predicted impact point is planned on-line based on the residual time estimation method,and the flight trajectory is designed on-line according to the relative position model according to the characteristics of the platform,thus,the on-line Trajectory Planning and guidance can be completed quickly and accurately.In the terminal guidance,considering the trend of intelligent and systematic development of aircraft,in order to deal with the developing threat,the intercepting efficiency should be improved.In this paper,the depth-enhanced learning algorithm is used to train the value evaluation network in the continuous state space based on the traditional proportional guidance,the relative distance and line-of-sight rate as the state,and the reward function considering the penetration Miss Distance,in order to improve the intercepting performance of the missile,the optimal proportional guidance effective navigation ratio is selected.Finally,in order to verify that the hypersonic missile has obvious advantages over the existing "THAAD-ER" anti-missile interceptor system in performance,the performance of the hypersonic missile is compared and analyzed based on the existing attack-defense simulation countermeasure evaluation methods,verify the superiority of the proposed scheme.