About the classical and structural controllability and observability of a common class of activated sludge plants
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2022-03
Major/Subject
Mcode
Degree programme
Language
en
Pages
19
8-26
8-26
Series
Journal of Process Control, Volume 111
Abstract
In this work, the stability, controllability and observability properties of a class of activated sludge plants are analysed. Specifically, the five biological reactors and the secondary settler in the Benchmark Simulation Model no. 1 (BSM1) are studied. For the task, we represented the plant as a dynamical system consisting of 145 state variables, 13 controls, 14 disturbances and 15 outputs and as a complex networks to study its full-state controllability and observability properties from a structural and a classical point of view. By analysing the topology of the network, we show how this class of systems is controllable but not observable in a structural sense, and thus how it is controllable but not observable in a classical sense for almost all possible realisations. We also show how a linearisation commonly used in the literature is neither full-state controllable nor full-state observable in the classical sense. The control and observation efforts are quantified in terms of energy- and centrality-based based metrics.Description
Funding Information: This study was done within the project Control4Reuse, part of the IC4WATER programme of the Water Challenges for a Changing World Joint Programme Initiative (Water JPI). The authors thank FUNCAP for the support within this initiative. Publisher Copyright: © 2022 The Authors
Keywords
Activated sludge process, Complex networks, Controllability, Observability, Stability, Structural control
Other note
Citation
Neto, O B L, Mulas, M & Corona, F 2022, ' About the classical and structural controllability and observability of a common class of activated sludge plants ', Journal of Process Control, vol. 111, pp. 8-26 . https://doi.org/10.1016/j.jprocont.2021.12.013