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Stability of 2-D Discrete Systems in the Presence of Saturation Function and Delays

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  • Control Theory and Applications
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Abstract

A variety of economically relevant processes are better modeled by using two-dimensional (2-D) models, which is the case, for instance, in metal rolling and the pharmaceutical industries. Typically Roesser and Fornasini Marchesini Local State Space (FMSLSS) models incorporate delayed states leading to a challenging stability analysis task. The main contribution of this work is to provide new convex stability analysis criteria for discrete-time FMSLSS models under both saturating function and time-varying delays. In particular, the saturating function tailors the digital control behavior, capturing the effect of finite wordlength. With Wirtinger and reciprocally convex sum lemmas, these new conditions can achieve less conservative results than other recent literature methods. Consequently, as illustrated by examples, this proposal enlarges the class of systems that can be stable-certified, still keep reasonable the associated computational effort.

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Correspondence to Suchitra Pandey.

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The author(s) received no financial support for the research, authorship, and/or publication of this article from any funding agency in the public, commercial, or not-for-profit sectors. The authors thank the Editor and the anonymous Reviewers for their constructive comments and suggestions.

Suchitra Pandey was born in Chhattisgarh, India in 1978. She received her B.E. degree from Pt. Ravi Shankar Shukla University, India, in 2003 and an M.Tech. degree from Bhilai Institute of Technology, Durg (BIT, Durg) affiliated to Chhattisgarh Swami Vivekanand Technical University (CSVTU), Bhilai, India, in 2008. She is currently working towards her Ph.D. degree at CSVTU, Bhilai. Her research interests include delayed systems, finite wordlength effects, multidimensional systems, and nonlinear systems.

Siva Kumar Tadepalli was born in Warangal, India, in 1978. He received his B.E. degree from Pt. Ravi Shankar Shukla University, India, in 2002 and an M.Tech. and Ph.D. degrees from Motilal Nehru National Institute of Technology (MNNIT), Allahabad, India, in 2009 and 2015, respectively. He has held the post of Assistant Professor, Associate Professor, and Professor at Bhilai Institute of Technology, Durg, India. He is currently working as an Assistant Professor in the Department of Electronics Engineering at National Institute of Technology, Uttarakhand, India. He is serving as an Associate Editor of the Journal of Control Automation and Electrical Systems. His current research interests include finite wordlength effects, multi-dimensional systems, and delayed systems and robotics.

Valter J. S. Leite úna (MG, Brazil). He received his Ph.D. degree in electrical engineering and in automatique et informatique industrielle from the University of Campinas (Brazil) and from the INSA de Toulouse (France), respectively, in 2005. He has been with CEFET-MG since 1997 and currently, he is an Associate Professor in the Department of Mechatronic Engineering at campus Divinópolis (MG, Brazil). V. J. S. Leite serves as an Associate Editor for the International Journal of Robust and Nonlinear Control, International Journal of Control, Automation and Electrical Systems, and Journal of Systems and Control Engineering. He authored more than 160 papers in journals, book chapters, and conferences. His main research interests include robust control, delay systems, control of LPV systems, fuzzy T-S systems, and constrained systems.

Rishi Nigam was born in Lucknow, India in 1990. He received his B.Tech. degree from National Institute of Technology (NIT), Srinagar, in 2012, and an M.Tech. degree from NIT Agartala, in 2017 and pursuing a Ph.D. degree from NIT Uttarakhand since 2019. He has worked as Assistant Professor under National Project Implementation Unit (NPIU), Director General of Training (DGT), Ministry of Skill Development and Entrepreneurship, Government of India, (TEQIP-3) from January 2018 till 2021. His current research interests include nonlinear systems, delayed systems, and one dimensional and multidimensional systems.

Surekha Bhusnur is a Professor and Head of Electrical and Electronics Engineering Department at Bhilai Institute of Technology, Durg, Chhattisgarh, India. She holds a Ph.D. degree for the research work on robust control using two loop control structure and coefficient diagram method. She owns membership of The Institution of Engineers, India. Her areas of interests are control systems, computer aided power system analysis, and fuzzy logic systems.

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Pandey, S., Tadepalli, S.K., Leite, V.J.S. et al. Stability of 2-D Discrete Systems in the Presence of Saturation Function and Delays. Int. J. Control Autom. Syst. 21, 788–799 (2023). https://doi.org/10.1007/s12555-021-1061-5

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