The Study On Flight Control Of Unmanned Combat Air Vehicle Automatic Landing On Carrier

The aircraft carrier can improve a country’s international influence. It is able to significantly expandthe carrier-based air combat radius. Carrier-based aircraft is an important part of the aircraft carriersystem, and it must have the ability of automatically carrier landing in all-day. In this paper, theUCAV Guidance Law and flight control law of its landing process were studied.First of all, according to the relevant knowledge of flight mechanics and aerodynamics. This paperdid a deep analysis of the unmanned combat aircraft and the nonlinear model of UCAV was built. Inorder to further analysis the characteristics of the UCAV a trim on the cost function has been designedand a number of equilibrium points has been set up. These could set a solid foundation for the nextstep of the control law design.Secondly, this paper designed a new guidance system with automatic landing according to therequirements of the task. It takes full account of the UCAV real landing environment and the flightdeck offset which makes the guiding system has more engineering significance. Beside this the GPSinformation was introduced into the guidance law design and gives its advantages of high positioningaccuracy.Thirdly, a flight control system has been designed using dynamic inverse nonlinear controlmethod. The control method of nonlinear was successfully used to landing control of UCAV. Afterthat this paper discussed the robust problem of nonlinear dynamic inversion controller and putforward the corresponding solution aiming at the robustness problem. Through the simulationexperiment it proved that the designed controller has good dynamic decoupling performance androbustness.Finally, the simulation model of landing process is established in the numerical environment inMATLAB and the wind disturbance model is given. The longitudinal and lateral guidance system wasvalidated in different initial conditions. In order to verify the guidance control system performance,this paper makes the corresponding200landing experiments adding random influence factors indifferent sea conditions. The simulation results show that this method applied to UCAV landing isfeasible and effective.This paper studied the UCAV landing process including the establishment of mathematical model,the design of guidance law in automatic landing and the flight control system. At last the wholesimulation platform is built to verify the performance of the system. The simulation results show thatthis system could well accomplish UCAV landing.