An unknown input multiobserver based on a discrete uncoupled multimodel for uncertain nonlinear systems: Experimental validation on a transesterification reactor. (October 2019)

• Record Type: Journal Article
• Authors: Messaoud, Anis; Ben Atia, Samah; Ben Abdennour, Ridha
• Is Part Of: ISA transactions. Volume 93(2019)
• Page Start: 302
• Page End: 311
• Publication Date: 2019-10
• Subjects: Uncertain nonlinear systems -- Unknown inputs -- Multiobserver -- Transesterification reactor -- Discrete uncoupled multimodel; Engineering instruments -- Periodicals; Engineering instruments; Periodicals; Electronic journals; 629.805
• DOI: 10.1016/j.isatra.2019.03.016
• Languages: English
• ISSNs: 0019-0578

Abstract

Abstract: In the present paper, an unknown input multiobserver (UIMO) is designed for the state estimation of uncertain non-linear systems. A discrete decoupled state multimodel is exploited to describe the behavior of non-linear systems. A particular transformation of uncertainties to unknown inputs is considered. The LMI approach is used to establish the convergence conditions of the state estimation error. The efficiency of the proposed strategy is emphasized through an illustrative example and a real time application on a semi-batch reactor that lead to good performance in terms of robustness, convergence speed and precision.