Research On Miss-Area Modeling And Closed-Loop Calibration Technology For Anti-aircraft Artiller

Anti-aircraft artillery is an important weapon and equipment for my country’s terminal air defense,and closed-loop calibration technology is one of the most effective ways to improve the accuracy of anti-aircraft artillery.Missing distance is a mathematical characterization of artillery shooting error.The accurate prediction of missed distance can realize closed-loop correction shooting ability and improve shooting accuracy.On the basis of the existing fire control theory,this thesis analyzes the miss distance,establishes an error model and a prediction model,and then gives the firing elements of the closed-loop calibration.The research results are applied to engineering projects,which is a closed-loop anti-aircraft artillery fire control system.Provide methods and support for the realization of the calibration shooting ability.Aiming at the problem of establishing the state equation of missed target,the mathematical model of missed target was studied.Firstly,it analyzes the miss amount from the two aspects of cause and correlation,then decomposes the miss amount into error source components according to the correlation,establishes the state equation of each error source,superimposes according to the principle,and finally establishes the mathematical model of the miss amount.Establishing a miss-target model as a prerequisite for predicting the miss-target.Aiming at the problem of miss sequence generation,based on the formation mechanism of miss volume,the ideal miss volume and equidistant point miss volume are studied.By comparing and analyzing different ballistic models,after simulation analysis,a simplified six-degree-of-freedom ballistic equation is selected as a reasonable ballistic model to generate an ideal miss distance sequence;in order to make up for the lack of ideal miss distance,the firing table is used as a reasonable ballistic model,which is generated after simulation analysis Equidistant point miss sequence.Generate miss target sequence as the prerequisite data for miss target prediction research.Aiming at the prediction of the missed target,the research on the establishment of the prediction model and the improvement of the prediction accuracy is carried out.By analyzing the state transition matrix and recurrence coefficients under different orders,a predictive model of the missed targets under different orders is established,and the rationality of the model is verified.In order to improve the prediction accuracy,an adaptive innovation Kalman filter prediction algorithm is designed.Simulations are carried out in four aspects: different orders,different known miss numbers,different radio frequencies,and method universality analysis.The results show that the adaptive innovation designed in this paper Kalman filter algorithm can effectively improve the accuracy of miss-target prediction.A more accurate prediction result of miss distance is the premise of closed-loop calibration.Aiming at the simulation and realization of closed-loop shooting,the principles of large closed-loop shooting and virtual closed-loop shooting are studied and simulated.At the same time,combine the research results and apply them to actual projects to implement the platform."Large closed-loop + virtual closed-loop" comprehensive calibration uses virtual closed-loop calibration to correct the assumed error of target motion in advance,and improve the existing large-closed-loop calibration capabilities.The simulation results show that the "large closed loop + virtual closed loop" comprehensive calibration can effectively improve the ability of closed-loop calibration.The improvement of the closed-loop capability lays the foundation for the improvement of the shooting accuracy of the anti-aircraft artillery.