| LEO early warning satellite system is the “eye” of missile defense system,which is an important part of missile defense system,and it is necessary to analyze and research the function of the LEO early warning satellite system.Taking the LEO early warning satellite system as the research object,the dissertation mainly studies the target location and tracking,detection and early warning simulation,and the integrated effectiveness evaluation of the LEO early warning satellite system.The main work of this paper is as follows:(1)The line of sight intersection target location and tracking for LEO early warning satellite system is modeled and analyzed.Establish the model of the line of sight intersection target location.By analyzing the influence factors of this method,the factors can be divided into two categories,which are the measurement error and the layout of LEO early warning satellite.The influence regularity of the error of measurement and the layout of the satellite on the positioning accuracy is analyzed.Different satellite selection schemes are designed.Analyze the variation of the positioning accuracy of the missile with different schemes.Combined with the positioning method and satellite selection scheme,the trajectory tracking of ballistic missile is carried out by using the Extended Kalman Filter algorithm.(2)Simulation study on the detection and warning of LEO early warning satellite system is developed.LEO early warning satellite's function model is constructed,including the detection distance,geometric visibility,optical visibility,warning time,and impact prediction model.Using the established model,develop the detection and early warning simulation software.Using the simulation software to carry out the simulation experiment,it can obtain the parameters of the detection and early warning system of the LEO early warning satellite system,and can provide basic data support for the comprehensive effectiveness evaluation of LEO early warning satellite system.(3)Effectiveness evaluation and analysis of LEO early warning satellite system is studied.Obtain comprehensive effectiveness evaluation of LEO early warning satellite system based on Analytic Hierarchy Process.Analyze the factors which influence its comprehensive effectiveness.By using the orthogonal design method,the simulation experiments of comprehensive effectiveness evaluation for LEO early warning satellite system is designed,and analyze the significance level of the impact factors which impact on the overall effectiveness.Identify the key factors that affect the overall effectiveness.In this paper,the influence factors and the influence law of the LEO early warning satellite on the positioning accuracy are further analyzed.On this basis,detection and early warning capacity simulation is carried out.The comprehensive effectiveness evaluation of LEO early warning satellite system is studied based on the developed simulation software.Under the guidance of the experimental design theory,the simulation experiment is carried out to analyze the influencing factors of the comprehensive efficiency,and the key factors are determined.The research results of this paper have certain theoretical and engineering value,which can provide reference for the further research in the related fields. |
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