Control of transients in water distribution networks by H&lt;FONT FACE=Symbol&gt;¥&lt;/FONT&gt; Control

Terra, Marco H.; Reis, José Antônio Tosta dos; Chaudhry, Fazal Hussain; Souza, Rafael Oliveira de

doi:10.1590/s0100-73862002000400006

Cited by 3 publications

(1 citation statement)

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“…In the following, attention is focused on the second problem. Because of its complexity, resort has usually been made to approximate or heuristic solutions based on simplified system representations and/or distributed-decentralized control strategies (Biscos et al, 2003;Cembrano et al, 2000;Koroleva and Krstic, 2004;Mercangoz and Doyle, 2007;Terra et al, 2002;Trawicki and Urbowska, 2007;Wang, 2007;Wang and Brdys, 2006). Often, these approaches do not ensure a satisfactory transient behaviour or even the stability of the actual non-linear control system.…”

Section: Introductionmentioning

confidence: 99%

Switched control of fluid networks

Blanchini

Viaro

2010

Transactions of the Institute of Measurement and Control

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A switched-control technique for fluid distribution systems is presented. It is based on a compartment model of the distribution network consisting of a number of interconnected reservoirs. The unforced flows among reservoirs and environment only depend (non-linearly) on the stored water levels (state variables), which are also influenced by the water demands (disturbances) and by the forced flows of the water pumped into or out of the reservoirs (controlled variables). The control objective is to drive the system to the equilibrium state and keep it there. This goal can be achieved by means of a state-feedback control, which entails switching the controlled inputs among given values according to the current system state. Necessary and sufficient stabilizability conditions are provided. The global asymptotic stability of the overall control system is proved by resorting to a suitable control-Lyapunov function. An experiment is worked out to show the performance of the adopted control policy.

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Section: Introductionmentioning

confidence: 99%

Switched control of fluid networks

Blanchini

Viaro

2010

Transactions of the Institute of Measurement and Control

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Global Asymptotic Stabilization of Large-Scale Hydraulic Networks Using Positive Proportional Controls

Jensen

Wiśniewski

2014

IEEE Trans. Contr. Syst. Technol.

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Applied Pipe Roughness Identification of Water Networks: Consideration of All Flow Regimes

Kaltenbacher

Steinberger

Horn

2023

IEEE Trans. Contr. Syst. Technol.

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This article presents a mathematically rigorous 1 unification of the pipe roughness identification problem of water 2 distribution networks considering all Reynolds regimes, i.e., 3 laminar, turbulent, as well as transitional flow regimes. Although 4 the identification procedure is based on steady-state hydraulic 5 network equations, the identified roughness parameters are also 6 key for dynamic models that can be used for model-based 7 controller and observer designs. While a three-cycle network 8 simulation example serves to illustrate the presented problem 9 formulation and solution in an extensive manner, the application 10 on a real-world drinking water network is in focus. In addition, 11 vital aspects, such as topology simplifications of the underlying 12 network and the importance of the generation and selection of 13 independent measurement sets, are addressed. We apply root-14 finding methods instead of methods based on optimization and 15 thereby show that the pipe roughness identification problem may 16 actually be applicable to identify as well as locate leakages. 17 Index Terms-Laminar flow, pipe roughness identification, 18 roughness calibration, transitional flow, turbulent flow, water 19 distribution networks. 20 I. INTRODUCTION 21 D RINKING water networks are of utmost importance 22 for society all over the world. However, the share of 23 nonrevenue water, i.e., water that never reaches a registered 24 consumer, accounts for 25%-50% of the total amount of 25 supplied water when put into a global measure (and up to 75% 26 in the emerging markets) as stated by the International Water 27 Association [1]. Consequently, the potential contributions of 28 control system technologies to water distribution systems are 29 manifold and cover, e.g., the coordinated control of distributed 30 actuators (valves and pumps), and the detection of leakages in 31 the water networks [2]. 32 The basis for advanced techniques is usually formed by 33 mathematical modeling of the underlying distribution network. 34 In the literature, two classical modeling approaches are widely 35 used.

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Control of transients in water distribution networks by H<FONT FACE=Symbol>¥</FONT> Control

Cited by 3 publications

References 7 publications

Switched control of fluid networks

Switched control of fluid networks

Global Asymptotic Stabilization of Large-Scale Hydraulic Networks Using Positive Proportional Controls

Applied Pipe Roughness Identification of Water Networks: Consideration of All Flow Regimes

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