Open AccessOUTPUT FEEDBACK CONTROL WITH CONSTRAINTS FOR NONLINEAR SYSTEMS VIA PIECEWISE QUADRATIC OPTIMIZATION
Author(s) -
Nguyễn Doãn Phước,
Pham Van Hung,
Hoang Duc Quynh
Publication year - 2017
Publication title -
vietnam journal of science and technology/science and technology
Language(s) - English
Resource type - Journals
eISSN - 2815-5874
pISSN - 2525-2518
DOI - 10.15625/2525-2518/55/3/8512
Subject(s) - control theory (sociology) , nonlinear system , piecewise , quadratic equation , controller (irrigation) , nonlinear control , computer science , control (management) , mathematics , mathematical analysis , physics , geometry , quantum mechanics , artificial intelligence , agronomy , biology
Very few output feedback control methods can be applied for a large class of nonlinear objects. If the control problem has supplementary constraints to satisfy, the number of suitable methods will be fewer. The paper proposes a nonlinear control method, which can be applied to output tracking control a wide range of various perturbed nonlinear objects. This output feedback controller is established based on piecewise quadratic optimizing subjected to input constraints for state feedback control and then combined with an appropriate EKF or UKF for system state observation. The simulation results obtained by applying this proposed controller to output tracking control inverted pendulum and boiler-turbine unit had confirmed its promising applicability in practice.