Research On Blended Control For Missile With Closed-loop Lateral Thrust And Aerodynamics

In recent years,high speed and large maneuvering targets,represented by hypersonic vehicles,have brought new challenges to air defense interception.The traditional aerodynamic guidance and control system has been unable to meet the requirements.The new generation of direct air compound guidance and control system,which introduces direct force on the basis of the original aerodynamic force,accelerates the speed of overload response,and has attracted wide attention from all over the world.Based on the orbit control type direct gas composite guidance control system as the research object,parameter perturbation and gas dynamic disturbance brought for the direct force closed loop,the composite guidance system of attitude control and guidance law design method of direct gas.The research contents can be summarized as follows:Firstly,mathematical modeling of rail controlled direct air compound guidance and control system is carried out.Rotating around the center of mass equation and kinematics equation derived centroid direct force closed loop,and then get the straight gas composite guidance and control system of the attitude control model and guidance control model,laid the foundation for further research of guidance and control problems.Secondly,the attitude controller of the direct air compound guidance control system is designed based on LQR/SDRE.First,direct composite guidance and control system of the attitude control problem is described for direct force gas condition;then,respectively from the control of linear and nonlinear perspective,LQR/SDRE control method based on attitude;on this basis,considering the aerodynamic force closed-loop direct influence of parameter perturbation,verified by simulation and the comparison of the two kinds of control methods,the simulation results show that the fast and stable fast and accurate tracking and rolling angle of two kinds of methods are able to achieve vertical plane and lateral plane overload,the aerodynamic parameters perturbation with strong robustness.In addition,the simulation results show that SDRE can achieve the same control effect as LQR with smaller control,the overload tracking error is smaller,and the roll angle converges to zero faster.Thirdly,the terminal guidance law design of the direct air compound guidance control system under the direct force closed loop is carried out.First,the direct force of the close loop straight gas terminal guidance law design problem of composite guidance and control system are described;then,the coupling system and power system of direct force problem,this paper proposes an approximate decoupling aerodynamic system ADRC guided combined terminal guidance strategy of direct force closed-loop correction;then,design the target maneuver estimation method based on ESO,and gives a target maneuver compensated ADRC guidance law;on this basis,according to the results of target maneuver estimation on terminal guidance of non zero effort miss prediction,thereby generating a direct force control command will directly force closed-loop correction of terminal guidance;finally,aiming at the sinusoidal maneuver and square wave motor,the proportional guidance,aerodynamic ADRC guidance and the direct force closed-loop modification is simulated to verify the design of the The effectiveness of the terminal guidance strategy is compared,and the superiority of the direct force close loop correction relative to the pure aerodynamic ADRC guidance is obtained.Finally,the direct air closed loop compound guidance and control system is simulated.First of all,gives the simulation and control system design parameters until then,respectively on the index;the ideal conditions and the presence of external disturbances and measurement of direct gas performance composite guidance control system simulation analysis under noise,the simulation results verify the effectiveness and robustness of the guidance and control of the proposed method in this paper;finally,according to the bad interaction effect of MATLAB,to build a comprehensive simulation platform based on LabVIEW.At the same time,introduction of disturbance torque measurement noise and aerodynamic parameter perturbation and other disturbances in the platform,the direct force closed straight gas composite guidance control system for the integrated simulation of ring.