Parametric Model Identification of Nonlinear Aircraft System With Actuator Saturation

The actuators are one of the most important components of an aircraft system that play a prominent role in the flight control system. Amplitude and rate saturations are one of the problems of the flight control systems which puts the closed-loop system stability at risk. These saturations are mainly responsible for the type II pilot induces oscillations (PIOs). In this paper, the parametric model identification of aircraft system concerning the amplitude and rate saturation is conducted by using the system data. Output error (OE) parametric model with different degrees and the number of parameters is investigated, and the quality of each model is evaluated. Then, the best model together with its parameters would be reported. The simulation results show the proper performance of the introduced model. This model has many applications in the design of linear controllers for the flight control system and reduces the complexity of the controller design.