Research On The Anti-wind Disturbance Control Of The Ballistic Missile In Boost Phase

The boost phase of the ballistic missile is in the atmosphere,and the disturbance of the wind zone can cause instability of the attitude,larger aerodynamic load and larger demand of the engine swing angle of the missile,so to study the anti-wind disturbance control problem about the boost phase of the ballistic missile and reduce the demand for engine swing angle is the focus of this paper.Aiming at the of anti-wind disturbance control problem about the boost phase of the ballistic missile,this paper has studied the dynamics and kinematics modeling of the ballistic missile under wind disturbance,attitude control system and active anti-wind disturbance control system:1.Considering the research status of wind field modeling at home and abroad,the wind field model including steady wind and shear wind is established.The steady wind is obtained by the experimental data.The shear wind is calculated to get shear wind speed data by using the triangular wave model,which is based on the Shear thickness of 1km.Based on the research results of current ballistic missile dynamics and kinematics model,the aerodynam ic and aerodynamic moment under wind disturbance are deduced,and the dynamics and kinematics models of the ballistic missile under wind disturbance are obtained.2.The linearized model of vertical and lateral attitude dynamics and kinematics is deduced,and the proportional-differential feedback control scheme is adopted for the pitch and yaw channel.The time-fuel sub-optimal control scheme is used to achieve the roll channel attitude tracking control.Based on the established wind field model,the six-degree-of-freedom simulation analysis of missile is carried out and compared under the state of no wind and in the wind.3.The optimal minimum load control scheme of the active anti-wind disturbance control circuit is adopted for the pitch and yaw channel.Based on the demand of the missile engine swing angle,the parameters of the active control circuit and the cut-off time of the control circuit are designed.Steady state analysis of minimum load control scheme under steady wind and shear wind is carried out respectively.By comparing the simulation results of different wind directions,the direction of the wind field when the engine swing angle is maximum is obtained.After adding various deviations and disturbances,the simulation results of the lower limit and upper limit are simulated and a nalyzed.4.Based on the simulation results of proportional-differential feedback control and minimum load control scheme in the first two chapters,the perturbation guidance circuit is added by using isochronous velocity inclination and isochronal speed deflection control scheme,which can verify the optimal effect of the active anti-wind disturbance control circuit with perturbation-control circuit.Based on the direction of the wind field and deviation when the engine swing angle is maximum obtained in the fourth chapter,comprehensive perturbation-control simulation is carried out.The conclusion is analysised.