Research On Autonomous Control Of Unmanned Combat Aircraft High Attack-angle Flying

In this paper,the autonomous control technology of Unmanned Combat Aircraft(UCA)high attack-angle flying is studied against the background of maneuvering flight.The nonlinear dynamic inverse control scheme and model reference sliding mode control scheme based on disturbance observer for UCA maneuvering at high Angle of attack are proposed;Considering the more drones actuators,by selecting the pseudo-inverse method and fixed point method and increasing the chain two control allocation strategy,the drone pilot was built.1)The action force and moment during the maneuver flight of unmanned aircraft are analyzed,and the motion model of the center of mass and the rotation model around the center of mass are established considering the aerodynamic characteristics and thrust vector;and then through the reasonable hypothesis and all small disturbance linearization model derived from the freezing method.2)Based on the data of F16 fighter,the aerodynamic characteristics and operation stability characteristics of fighter are analyzed;Complete the entire thrust,attack Angle and roll Angle command sequence design,design herbst-like maneuver trajectory plan,to make three-degree-of-freedom simulation.3)Based on the nonlinear dynamics model of UCA,the nonlinear dynamic inverse controller containing a disturbance observer was designed according to the nonlinear dynamic inverse and singular perturbation theory.The control allocation scheme combining the pseudo-inverse method and the fixed point method was selected to construct the composite controller.Herbst-like six-degree-of-freedom simulation analysis was performed on the performance of the control system under disturbance or undisturbance conditions.4)Taking the organism as the second order oscillation link t o construct the reference model,through the model error and other distractions linear sliding mode control law design,and the expansion of finite time convergence disturbance observer design,using the method of increasing the chain to control the torque distribution,Herbst via the class six degrees of freedom dynamic simulation on composite controller performance test analysis.