Switching Control For Blended Controled Missiles

Defense against maneuverable tactical ballistic missiles(TBM)15 an imPortanttoPic in modern military field.But it 15 not enough to control the intercePtor highlyaccurately only by mean of aerodynamic rudder.We need to use both the lateralthrust and the aerodynamic rudder.By this control scheme,the intercePtor can bemore maneuVerable and resPonse more quickly.For the Problem stated,this thesisstudied switching control for the missile blended control system.With an assumPtion that the missile 15 axially symmetric and dose not roll,weestablish the kinematic and dynamic models to describe the missile'5 motion underthe lateral thrust and aerodynamics blended control.Under an assumPtion of smalldi sturbance,we linearize the model of the missile'5 motion and ignore someunimPortant factors.Then we decouPle the missile'5 motion into three looPs,i.e.,Pitch,yaw and roll,and establish three linearized models to describe the missile'smotion in the three looPs under the lateral thrust and aerodynamics hybrid control.Finally,we get the state sPace model of missile'5 short Period motion.With the missile'5 Pitch channel as an examPle,we design a switched controlsystem using the continuous synthesis method of switched systems.First,weconstruct the integral of the error of overload and design the control law of eachsub systems.And then,we design the switching law of the switched system.Numerical simulation at an oPeration Point for the system 15 done withconsideration of the limit of rudder deflection angles.Simulation results show thatthe system has a fast dynamic resPonse.For the same examPle,we also design a switched control system using thediscrete method of switched systems.Numerical simulation for the discrete systemat an oPeration Point 15 done in the MATLAB/SIMULINK environment.In thePeriod of the simulation,we considered the limit of the rudder'5 deflection angles.Simulation results show that the control system can establish the angle of attack andresPonse to the overload command quickly.