Model‐free output feedback discrete sliding mode control with disturbance compensation for precision motion systems. Issue 14 (19th August 2020)

• Record Type: Journal Article
• Authors: Li, Min; Tan, Shuhua; Xiong, Jiaxi; Gan, Jinqiang; Zhang, Xinxin
• Is Part Of: IET control theory & applications. Volume 14:Issue 14(2020)
• Page Start: 1867
• Page End: 1876
• Publication Date: 2020-08-19
• Subjects: control system synthesis -- discrete time systems -- variable structure systems -- feedback -- robust control -- observers -- nonlinear control systems; disturbance compensation -- data‐driven control method -- parametric model -- model‐free OFDSMC -- parameter model -- model uncertainties -- precision motion systems -- novel model‐free output feedback discrete -- traditional discrete sliding mode control design -- parametric input–output model -- system states -- essential four control terms; Control theory -- Periodicals; Automatic control -- Periodicals; 629.8312
• DOI: 10.1049/iet-cta.2019.1184
• Languages: English
• ISSNs: 1751-8644

Abstract

Abstract : This study proposes a novel model‐free output feedback discrete sliding mode control (OFDSMC) with disturbance compensation to achieve high performance for precision motion systems encountering model uncertainties and disturbances. Traditional discrete sliding mode control design requires model and/or state information. In this study, OFDSMC with disturbance compensation is first developed by using a parametric input–output model such that no system states are needed. The essential four control terms of OFDSMC with disturbance compensation is revealed. Then a data‐driven control method is introduced into OFDSMC to eliminate the need for the parametric model. The proposed model‐free OFDSMC facilitates a rapid implementation without either a parameter model or a state observer, and achieves good robustness against model uncertainties and disturbances. Finally, three simulation cases are presented to illustrate the effectiveness and enhanced performance of the proposed approach.