State estimation in mechanical systems of fractional-order based on a family of proportional ρ-integral observers

In control theory, there are many proposals to solve the problem of observer design. This paper studies the Mittag-Leffler stability of a class of dynamic observers for nonlinear fractional-order systems, given in the observable canonical form and defined by the Caputo fractional derivative. We prov...

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Veröffentlicht in:Nonlinear dynamics 2023-11, Vol.111 (21), p.19879-19899
Hauptverfasser: Martínez-Fuentes, Oscar, Muñoz-Vázquez, Aldo Jonathan, Fernández-Anaya, Guillermo, Tlelo-Cuautle, Esteban
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container_end_page 19899
container_issue 21
container_start_page 19879
container_title Nonlinear dynamics
container_volume 111
creator Martínez-Fuentes, Oscar
Muñoz-Vázquez, Aldo Jonathan
Fernández-Anaya, Guillermo
Tlelo-Cuautle, Esteban
description In control theory, there are many proposals to solve the problem of observer design. This paper studies the Mittag-Leffler stability of a class of dynamic observers for nonlinear fractional-order systems, given in the observable canonical form and defined by the Caputo fractional derivative. We prove that the Riemann–Liouville integral could be employed to provide robustness against noisy measurements during the estimation problem. Based on this advantage, the main result of this paper consists of the design of a family of high-gain proportional ρ -integral observers employed to estimate unmeasured state variables of nonlinear fractional systems of commensurate order. Three illustrative numerical examples of mechanical systems are provided, which corroborate the effectiveness of the proposed algorithms.
doi_str_mv 10.1007/s11071-023-08919-4
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subjects Algorithms
Automotive Engineering
Canonical forms
Classical Mechanics
Control
Control theory
Derivatives
Design
Dynamic stability
Dynamical Systems
Engineering
High gain
Integrals
Mechanical Engineering
Mechanical systems
Nonlinear systems
Observers
Original Paper
Robustness (mathematics)
State estimation
System effectiveness
Variables
Vibration
title State estimation in mechanical systems of fractional-order based on a family of proportional ρ-integral observers
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