Fault Tolerant Controller Design for Nonlinear Air Vehicle Model

In this paper, a new method for designing autopilot for an air vehicle with polynomial nonlinear model is presented. Moreover the method is developed to fault tolerant control autopilot using combined projection and redesign methods. The nominal autopilot has been designed based on regulator controller for the polynomial nonlinear model and sum of square optimization theory. Previous theoretical methods have been extended from the regulator type to the tracking. Stability of the closed loop system is guaranteed by introducing a polynomial Lyapunov function that is derived using sum of squares optimization method. Then, the feasibility problem has been changed to the optimization problem. The proposed method has been used on an air vehicle supersonic with nonlinear polynomial model. The results showed proper operation in normal and faulty situations.