An innovative algorithm for tuning of composite nonlinear feedback control in continuous‐time systems. Issue 3 (18th August 2022)

• Record Type: Journal Article
• Authors: Vazani, Ali; Ghaffari, Valiollah
• Is Part Of: Asian journal of control. Volume 25:Issue 3(2023)
• Page Start: 2295
• Page End: 2304
• Publication Date: 2022-08-18
• Subjects: actuator saturation -- composite nonlinear feedback -- controller design -- parameter tuning; Automatic control -- Periodicals; Control theory -- Periodicals; 629.805
• DOI: 10.1002/asjc.2921
• Languages: English
• ISSNs: 1561-8625

Abstract

Abstract: The transient response improvement is the most crucial feature of the composite nonlinear feedback (CNF) controllers. This study proposes a novel CNF tuning method for systems subject to saturation. To achieve the goals, the linear part is optimally obtained via a performance index and the linear matrix inequality (LMI). Then, employing the passivity property, a heuristic way is suggested to adjust the nonlinear term. Thus, the automatic and online features would be the key novelties of this algorithm compared with the offline, trial and error, or nonautomatic ones. Some systems are simulated to evaluate the technique and compare with the existing methods. The outcomes confirm that the proposed tuning yields outstanding improvement concerning the aforementioned systems.