On inversion-based approaches for feedforward and ILC. (April 2018)

• Record Type: Journal Article
• Authors: van Zundert, Jurgen; Oomen, Tom
• Is Part Of: Mechatronics. Volume 50(2018)
• Page Start: 282
• Page End: 291
• Publication Date: 2018-04
• Subjects: Model inversion -- Nonminimum phase -- Feedforward control -- ILC; Computer integrated manufacturing systems -- Periodicals; Flexible manufacturing systems -- Periodicals; Mechatronics -- Periodicals; Productique -- Périodiques; Fabrication, Systèmes flexibles de -- Périodiques; Mécatronique -- Périodiques; Computer integrated manufacturing systems; Flexible manufacturing systems; Mechatronics; Periodicals; 629.89
• DOI: 10.1016/j.mechatronics.2017.09.010
• Languages: English
• ISSNs: 0957-4158

Abstract

Abstract: System inversion is at the basis of many feedforward and learning control algorithms. The aim of this paper is to analyze several of these approaches in view of their subsequent use, showing inappropriate use that is previously overlooked. This leads to different insights and new approaches for both feedforward and learning. The methods are compared in various aspects, including finite vs. infinite preview, exact vs. approximate, and quality of inversion in various norms which directly relates to their use. In addition, extensions to (non-square) multivariable and time-varying systems are presented. The results are validated on a nonminimum-phase benchmark system.