The Research Of Carrier Landing Control Of The High-aspect-ratio UAV

With the rapid development of China's naval power,the automatic landing guidance and control technology of carrier-based unmanned aerial vehicle(UAV)is also needed to be solved urgently;however,since the advent of carrier-based aircraft,how to achieve its safe landing in the complex landing environment has always been the biggest technical problem of automatic landing.Therefore,it is of great significance to study UAV automatic warship guidance and control technology.This paper takes a high-aspect-ratio UAV as the control object to achieve its carrier landing.Firstly,the relative motion model is established based on the relative motion theory,and the longitudinal decoupling control strategy of elevator control attitude and engine control trajectory is developed.The controller of pitch angle and speed are designed by utilizing theories of MRAC and DI to realize the longitudinal flight stability of UAV,while the controller of height and forward position based on relative vertical speed are designed to restrain the adverse impact of wind disturbance and realize accurate tracking of the landing trajectory by broadening the inner loop bandwidth and improving the system response.Secondly,combined with the dynamics characteristics of UAV,the lateral stability augmentation control law and roll angle control law are designed to solve the lateral stability control problem.Aiming at the problem of translational trajectory tracking,a translational trajectory tracking control law is designed,which is mainly to adjust the course supplemented by eliminating lateral movement,to achieve carrier landing with no sideslip angle and lateral movement.Finally,according to the relative motion relationship of aircraft and ship,combined with the gliding performance of UAV,the relative trajectory of automatic landing is designed to solve the problem of automatic landing on ship.The entire numerical flight simulation of carrier landing is simulated under Matlab /Simulink.The simulation results show that the automatic landing guidance and control scheme designed in this paper has good anti-wind disturbance ability,which can quickly restrain the adverse impact of wind disturbance and realize the safe landing of UAV.