Research On Robust Control Of Perturbation Observation Compensation For BTT Missile

With the current battlefield target and missile maneuverability becoming stronger,the BTT missile has been used more and more in the battlefield because of its own turning and tracking target through the tilting body.In the course of large range maneuver of BTT missile,the rolling angle will change rapidly,and the rolling rotation speed will produce coupling terms in yaw channel and pitch channel respectively.In a large maneuver scenario,the effect of coupling on the control effect is particularly significant.The traditional BTT missile control method is controlled by the coordinated branch way,which compensates the influence of the coupling term.However,the design process is too cumbersome in the case of large airspace.In order to solve this problem,a robust control method based on disturbance observation compensation is adopted to design the autopilot for BTT missile.This article mainly includes the following research content:Firstly,the mathematical model of BTT missile is built,and the kinematic and kinetic models are established to form the missile motion equations.The calculation method of overload is given,and the linearization model of BTT missile is obtained on the basis of reasonable assumption.Secondly,considering the uncertainty of parameters such as aerodynamic parameters,velocity,air density,the robust controller is designed and simulated based on the rolling channel and pitch-yaw channel of BTT missile model and the integrated method is used.The advantages and disadvantages of the two ways to design controllers are analyzed by singular value and structural singular value theory.Finally,a generalized extended state observer is used to compensate for the disturbance of the BTT missile during flight.Firstly,the interaction between the uncertainty parameters and the channel is considered as the disturbance on the rudder and the disturbance compensation control law is designed for roll,pitch and yaw channels respectively.The validity of the perturbation compensation algorithm is illustrated by mathematical simulation.The jitter and overshoot of the BTT missile in response to the command are effectively reduced by the robust controller after adding the disturbance observation compensation,and the dynamic effect of the robust controller is improved.