Robust composite nonlinear feedback control based on integral sliding-mode control of uncertain time-delay systems under input saturation

• Published in: Journal of vibration and control 2023-12, Vol.29 (23-24), p.5304-5317
• Main Authors: Hu, Jiyuan, Ghaffari, Valiollah, Mobayen, Saleh, Asad, Jihad H, Vu, Mai The
• Format: Article
• Language: English
• Subjects: Actuators; Control methods; Control systems; Feedback control; Linear matrix inequalities; Nonlinear control; Nonlinear feedback; Robust control; Sliding mode control; Time delay systems; Tracking problem; Transient response
• ISSN: 1077-5463; 1741-2986
• DOI: 10.1177/10775463221133424

In this research, based on the integral sliding-mode scheme, a robust composite nonlinear feedback (CNF) control is addressed for time-delayed uncertain systems. Such an uncertain system may contain some complexities like time-varying delays, actuators saturation, and exterior disturbances. Hence, the tracking problem would be solved under the mentioned constraints. Thus, for achieving these goals, the tracking problem is firstly formulated by considering system’s limitations. The controller parameters may be determined via a solution for linear matrix inequality. As a result, the CNF tracker law is numerically simulated in some control cases. The simulation outcomes are compared with a similar technique in terms of the transient response, boundedness of the error, and the disturbance rejections. Thus, the findings illustrate the efficiency of the advised CNF control method comparing to the recent technique.