Study On External Ballistic Characteristics Of Separated Compound Jamming Projectile

In view of the shortcomings of current shipborne passive jamming equipment,such as single material performance,large volume and weight,and difficult synchronization of jamming sources in operation,a separated composite jamming missile has been developed,which can release multiple jamming sources to counter incoming radar,infrared and radar/infrared guided missiles,thus losing its target,reducing hit probability and effectively reducing its volume.And weight,reduce the difficulty of logistics support.Because the jamming projectile is a low-speed non-rotating projectile and there is unstable disturbance in the off-time of the combat parts at all levels,it is difficult to guarantee the stability of the projectile in flight.In order to ensure that the warheads at all levels of the jamming projectile can successfully complete combat tasks,it is necessary to ensure the flight attitude stability of the jamming projectile in flight.Therefore,the flying attitude of the separated Compound Jamming projectile is determined through the analysis and Simulation of the air motion process.Firstly,based on the theory of external ballistics,the force and moment acting on the separated Compound Jamming projectile and the explosive driving effect of the separated Compound Jamming projectile in the process of detonation and separation are analyzed after choosing the appropriate coordinate system.After determining the force and moment acting on the projectile in the process of detonation and separation,the mathematical model of the particle trajectory of the projectile is established according to the actual situation of the flight of the projectile,and then the trajectory of the project Through Newton's second law and momentum moment theorem,the motion equation of the center of mass and the motion equation around the center of the projectile are derived.Finally,the rigid body motion equations of the projectile are obtained by combining the angular relations between coordinate systems.After the establishment of the projectile mathematical model,the particle trajectory mathematical model and the six-degree-of-freedom rigid body motion mathematical model of the separated compound disturbance projectile are modeled by using Simulink program in MATLAB software.After the establishment of the simulation model,the parameters of the model are initialized and the appropriate solver is selected according to the actual situation of the projectile flight.The trajectory and trajectory variation of the particle trajectory of the separated Compound Jamming projectile are obtained by numerical calculation of the simulation model.The trajectory and the trajectory characteristic parameters of the axle pitch angle_a,the trajectory inclination angle_v,the yaw angle₍?6? and the lateral yaw angle_v during the flight of each stage of the rigid body trajectory can be determined by comparing the simulation results with the experimental results.The simulation model accords with the actual flight situation of the projectile,and can play an important reference role in determining and adjusting the flight attitude of the projectile.The simulation system of rigid body motion module built in this paper has certain extensibility and versatility,and each subsystem module can be simulated independently.At the same time,the model can be modified and the parameters can be adjusted at any time.