Research On Modeling And Control Method Of Nulka Active Missile Decoy

The British destroyer Sheffield was hit by Argentinaundefineds "Flying Fish" anti-ship missile during the Amar War in the 1980 s,and then sank into the vast sea.The anti-ship missiles,which indicate terminal guidance using active radar homing,pose a great threat to surface warships.Therefore,various countries actively study the technology and equipment of warship missile defense,in addition to using hard kill means.For example,methods such as ship-to-air missiles and end dense array artillery,the use of electronic jamming means of soft killing is also a key technology and equipment for active research and development in various countries.Among all the outboard active electronic soft killing equipment,the Nulka active electronic decoy which is developed jointly by Australia and the United States is a naval electronic warfare equipment with remarkable technical characteristics.On the basis of information science and technology literature retrieval,collection analysis and comprehensive research,this paper deeply studies the working principle of Narka electronic decoy system by using counter-design thought and method.The overall performance of the decoy missile and the application process and mode of soft kill combat against the incoming anti-ship missile are verified by mathematical modeling,parameter estimation and countermeasure simulation.The specific contents of the study are as follows:1)On the basis of the analysis of the technical characteristics of Nulka electronic decoy,the reasonable coordinate system is defined,and the transformation relation of coordinate system is given.The mechanical analysis of Nulka electronic decoy is carried out,and the dynamics and kinematics model of Nulka electronic decoy is established.2)Reverse design of the overall parameters of Nulka electronic missile decoy.The shape,mass,center of mass and moment of inertia of each part of Nulka electronic decoy are designed.The aerodynamic characteristics of Nulka electronic decoy are estimated.3)The control system of Nulka electronic decoy is designed.According to the trajectory form of Nulka electronic decoy,a high altitude pilot based on classical PID control method and an active disturbance rejection altitude pilot based on tracking differentiator,nonlinear error feedback and extended state observer are designed.The typical working conditions of Nulka electronic decoy are analyzed by mathematical simulation.4)Six degrees of freedom trajectory simulation of the altitude pilot designed by using the typical flight trajectory of the Nulka electronic decoy is carried out.The flight trajectory characteristics of Nulka electronic decoy are analyzed,and the simulation results of track,attitude,control torque and shield effect are given.