Flight Control For Dual-spin Stabilized Projectile Equipped With Canards

In the modern war,higher requests of performance index in the conventional projectile and rocket weapon system has been put here,and the many conventional and rotational stability missiles have been designed.Because of the characteristics of high speed rotation,it has good anti-disturbance ability during the flight.At the same time,it also increases the difficulty of the two-dimensional trajectory correction.In this thesis,the canard guided dual-spin projectile as this study object,which is based on its flight characteristics,control methods and guidance scheme.The main research contents include the following aspects:Firstly,in this thesis,the canard guided dual-spin projectile's especial structure had been analyzed.In the condition of equal mass,symmetry of geometric shape about projectile vertical axis and center of front part,the force and moment on the canard guided dual-spin projectile were analyzed.Combined with the method of dual-spin projectile structure character and 6D model of conventional projectile and rocket,the 7D model of the canard guided dual-spin projectile had been constructed.Moreover,in the different condition,ballistic simulation both with no control and control had been done.After that,the canard guided dual-spin projectile's 7D nonlinear model has simplified in this study.According to dual-spin projectile with the conventional method,its complex angle equation of motion has been built.Gyro stability,follow the stability and dynamic stability have been analyzed.Finally,its correctness was verified by simulating 7D ballistic model.In the third stage,based on the canard guided dual-spin projectile's 7D ballistic equation,dynamic model which is fit in nonlinear control system was deduced.What's more,way to acquiring ballistic balanced point has been deduced.Regarding ballistic balanced point as ballistic basic point,quasi linear variable parameter model to the canard guided dual-spin projectile has been constructed.Furthermore,the dynamic characteristics have been analyzed.Under the condition of the premise of system state can be measured,based on H? robust control method,the controller of the model was designed,and its correctness was verified by the simulation example.In the end,In this thesis,the canard guided dual-spin projectile's stability of terminal guidance law is studied.For low mobility target on the ground,dual-spin stability set up for target tracking problem,which is converted to the ideal trajectory tracking problems.First of all,this thesis using the modified proportional guidance law in the classic theory,design the dual-spin projectile at the end of the stability of the guidance law,and a numerical example simulation was carried out.Adopted in this thesis,then the trajectory prediction theory in modern control theory,the measurement data under the condition of limited,the rate of terminal guidance for the design,its validity is verified by the example simulation,and compared both of advantages and disadvantages.