Research On Carrier Aircraft Landing Based On Integrated Filght/Propulsion Control

The automatic landing system of carrier-based aircraft is one of the key technologies of aircraft carrier/carrier-based aircraft system.It is also an important research topic to achieve the aircraft-ship integration technology.Due to the low dynamic pressure state in the process of landing,the efficiency of control surfaces is decreasing.As a result,the control surfaces cannot accurately control the carrier aircraft to follow the expected landing curve,which leads to the failure of landing.Therefore,it is necessary to control the thrust in real time to compensate the shortage of the control capability of control surfaces.The integrated flight/propulsion control technology of carrier aircraft combines the flight subsystem with the propulsion subsystem,taking full consideration of the coupling relationship between the two subsystems.It improves the landing path tracking ability of the carrier aircraft,and improves the success rate of landing.In this paper,the research on the integrated fight/propulsion control of landing is mainly carried out to solve the coordination problem of flight control and thrust control.According to the physical and dynamic characteristics of the flight subsystem and propulsion subsystem of the carrier aircraft,the flight subsystem model and the propulsion subsystem model are established respectively.Then according to the coupling relationship between these two subsystems,the combination of them forms a mathematical model of the integrated flight/propulsion system.Finally,the validity of the model is verified by an open loop simulation.In the design process of the integrated flight/propulsion landing controller,the improved neural network dynamic inverse control method is used to design the attitude controller of the flight subsystem.And the thrust controller of the propulsion subsystem is designed utilizing the direct thrust control method.Then the flight/propulsion coupling controller is designed to connect the flight subsystem controller and the propulsion subsystem controller to form an integrated flight/propulsion controller.Based on the characteristics of carrier aircraft landing,the landing guidance controller is designed,which will eventually form the integrated flight/propulsion landing system.Finally,the control efficiency of this designed landing control system is tested through relevant simulations.Since the air wake is one of the main reasons for the failure of landing,this paper also analyzes the air wake and adds it to the landing simulation.The simulation results show that the proposed integrated flight/propulsion controller has strong robustness that can effectively control the landing trajectory even under severe sea conditions and meet the requirements of landing.