PI Regulation of a Reaction-Diffusion Equation with Delayed Boundary Control

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Title: PI Regulation of a Reaction-Diffusion Equation with Delayed Boundary Control
Authors: Lhachemi, HugoPrieur, ChristopheTrélat, Emmanuel
Permanent link: http://hdl.handle.net/10197/11966
Date: 22-May-2020
Online since: 2021-02-23T16:45:43Z
Abstract: The general context of this work is the feedback control of an infinite-dimensional system so that the closed loop system satisfies a fading-memory property and achieves the setpoint tracking of a given reference signal. More specifically, this paper is concerned with the Proportional Integral (PI) regulation control of the left Neumann trace of a one dimensional reaction-diffusion equation with a delayed right Dirichlet boundary control. In this setting, the studied reaction diffusion equation might be either open-loop stable or unstable. The proposed control strategy goes as follows. First, a finite dimensional truncated model that captures the unstable dynamics of the original infinite-dimensional system is obtained via spectral decomposition. The truncated model is then augmented by an integral component on the tracking error of the left Neumann trace. After resorting to the Artstein transformation to handle the control input delay, the PI controller is designed by pole shifting. Stability of the resulting closed-loop infinite-dimensional system, consisting of the original reaction-diffusion equation with the PI controller, is then established thanks to an adequate Lyapunov function. In the case of a time-varying reference input and a time-varying distributed disturbance, our stability result takes the form of an exponential Input-to-State Stability (ISS) estimate with fading memory. Finally, another exponential ISS estimate with fading memory is established for the tracking performance of the reference signal by the system output. In particular, these results assess the setpoint regulation of the left Neumann trace in the presence of distributed perturbations that converge to a steady-state value and with a time-derivative that converges to zero. Numerical simulations are carried out to illustrate the efficiency of our control strategy.
Funding Details: European Commission - European Regional Development Fund
Science Foundation Ireland
Funding Details: I-Form industry partners
Type of material: Journal Article
Publisher: IEEE
Journal: IEEE Transactions on Automatic Control
Copyright (published version): 2020 IEEE
Keywords: 1-D reaction-diffusion equationPI regulation controlNeumann traceDelay boundary controlPartial Differential Equations (PDEs)
DOI: 10.1109/TAC.2020.2996598
Language: en
Status of Item: Peer reviewed
This item is made available under a Creative Commons License: https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Appears in Collections:Electrical and Electronic Engineering Research Collection
I-Form Research Collection

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