A320 Aircraft Autopilot Motion Control Simulation Research

A control method of the simulation of the aircraft automatic flight is proposed in this dissertation, which is objected to A320 aircraft and based on the identification of A320 aircraft model.Firstly, the character of electric signal transformation flight control system is described briefly,and research the structure of control law of this system.Then the QAR data of A320 would be analyzed and preprocessed.Secondly, the simulation design of the vertical and horizontal lateral automatic flight control law is completed, which uses of the classical control theory. According to the aircraft autopilot structure and working principle, and combining with the aircraft equations of motion, and the simulation is made research after getting the automatic flight control law. The simulation results show that the classical control theory of the vertical and horizontal lateral automatic flight control law can be more realistic simulated the motion effect of the A320 autopilot.Finally, the aircraft model in this dissertation is identified from QAR data. The integrated aircraft model is close to A320, but some parameters is not very accurate.And the process of parameter tuning is tedious and requires the designers' experience if let the simulated the motion effect of classical PID controller approach the A320. To this trait of classical PID controller, a simulation design of the aircraft autopilot controller which is based on BP neural network and PID theory has been accomplished. Simulating the designed control law, and comparing the simulation results of the network PID controller with the results of classical PID controller and the A320 QAR data, the results show that the neural network PID controller has advantages in controlling the responding speed and stability of the controlpiston. And in the whole vertical and horizontal lateral simulation controlling, the controller which is designed by network BP neural network and PID theory can simulate the motion effect of the A320 autopilot realistically and meet the control demands.