Research On The Technology Of Two-dimensional Trajectory Correction Based On High Spin Projectile

In recent years,it is an urgent issue to be solved that how to guide the traditional unmanned projectiles which could improve hit accuracy and achieve the precision strikes.It has become trends of research at home and abroad.And the characteristic of trajectory correction projectile is that the traditional unmanned projectiles can obtain the higher hit accuracy with lower cost,so that it can attack targets accurately.In this paper,a two-dimension high-spinning trajectory correction projectile is regarded as the research object.According to the control principle of the spinning trajectory correction mechanism,the basic conditions of controllable correction mechanism are analyzed.And trajectory and control system model of the projectile are established to simulate.The results are to analyze controllability performance during the flight process comparing with different airfoil shapes of projectile.The main work is as follow:Firstly,the flight mechanics model and control system model of the high-spinning projectile are proposed.The changing of every moment during the flight process with different length of wingspans and different rudder deflection angles can be obtained through trajectory simulation.So,with necessary requirements of moment of the correction mechanism,the most suitable airfoil shape,which has maximum controllable time,can be determined.And a control system that meet the requirement of characteristics is established.Secondly,a numerical simulation was used to obtain aerodynamic parameters of the high-spinning projectile.The result of flow field of the pressure and Mach number can be found.Furthermore,aerodynamic force and aerodynamic moment coefficients are calculated and analyzed.Thirdly,the controllable region of different wingspans and rudder deflections in the process of flight can be calculated through trajectory simulation.And the model of three-closed-loop control system for the correction mechanism is established.A simulation of speed and phase of the two-dimension...