Open AccessGeneralized predictive control of the aircraft system with actuator saturation to prevent Pilot-induced Oscillations
Author(s) -
Pouya Sirous Rezaei,
Alireza Khosravi
Publication year - 2022
Publication title -
maǧallaẗ al-abḥāṯ al-handasiyyaẗ
Language(s) - English
Resource type - Journals
eISSN - 2307-1885
pISSN - 2307-1877
DOI - 10.36909/jer.16725
Subject(s) - control theory (sociology) , robustness (evolution) , pid controller , nonlinear system , amplitude , actuator , model predictive control , robust control , describing function , control system , engineering , computer science , control engineering , control (management) , physics , temperature control , biochemistry , chemistry , electrical engineering , quantum mechanics , artificial intelligence , gene
Amplitude and rate saturations are one of the problems of flight control systems which puts the closed-loop system stability at risk. These nonlinear elements are mainly responsible for the type II pilot induces oscillations (PIOs). In this paper, a robust unconstrained generalized predictive controller (GPC) with a self-tuning regulator (STR) structure is designed in the frequency domain to prevent the type II PIOs. Furthermore, the sensitivity function is used for tuning the GPC parameters and investigating the stability and robustness of the system against the uncertainties of the controller parameters. To get better results, a constrained GPC is further designed considering the rate, amplitude, and both saturations. Rate and amplitude saturations are considered as input constraints in the design stage. Finally, the performances of the proposed controllers are compared to that of a PID controller.