Research On Ballistic Trajectory Correction Method

With the development of modern hi-tech technology,the precision of weapon strike is getting higher and higher,and the correction bomb has played a very long superiority in the modern war.Bullet-fired bullets have the characteristics of high precision,small size,light weight and small circular error,and have become the focus of development for all military powers nowadays.As the focus of modern military research,the design of the bullet correction mechanism,the projectile aerodynamic layout and its effect,as well as the trajectory correction are the key issues to be studied.First of all,the thesis analyzes the current situation and trend of trajectory correction home and abroad,and deeply analyzes the current development situation of tail-guarded missile.On this basis,two bullet trajectory correction programs are proposed.One is to control the rotation speed of the tail the other one is to use the gyroscopic effect of rotating body to be amended.The aerodynamic and kinematic co-simulation is used to simulate the simulation and to analyze the trajectory correction method.Secondly,based on the theory of external ballistics,under different aerodynamic shapes,the aerodynamic layout of the modified mechanism is determined,that is,the mesh and projectile numerical simulation of the projectile model are obtained about the different angles of attack,Mach number,Variation of various forces and moments under tail angle.Finally,the kinetic model of the aft tail correction projectile was established.The aerodynamic equations of projectile and tail were introduced into the dynamic model,and then the aft tail was corrected.