Design of Nonlinear Dynamic Inverse Control Law for High Angle of Attack Aircraft

Abstract

The purpose of this thesis is to discuss the application of Nonlinear Dynamic Inverse (NDI) in high-angle flight control The main work is around high angle of attack (A O A) and the design of flight control law so it is necessary to deal with a wide range of operating points When entering a A O A the performance of the control surfaces is drastically reduced due to the separation of the airflow so the control of the airfoil is greatly reduced resulting in a decrease in the maneuverability of the aircraft The NDI provides a direct method for the control system designers to derive the control law of the nonlinear system convert the nonlinear system into an equivalent linear system and use this method to design the controller of the angular velocity loop and the attitude loop This thesis adds the thrust vectoring and uses a control allocation to assign the choice of aerodynamic and vector nozzle control surfaces Finally different flight operation modes are verified The results show that the NDI control can prove that it has good control ability under a wide range of angles of attack

Date of Award	2019
Original language	English
Supervisor	Ciann-Dong Yang (Supervisor)