Now showing items 1-18 of 18

  • Abnormal quality detection and isolation in water distribution networks using simulation models 

    Nejjari Akhi-Elarab, Fatiha; Pérez Magrané, Ramon; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Cugueró Escofet, Miquel Àngel; Sanz Estapé, Gerard; Mirats Tur, Josep Maria (2011)
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  • Abnormal quality detection and isolation in water distribution networks using simulation models 

    Nejjari Akhi-Elarab, Fatiha; Pérez Magrané, Ramon; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Sarrate Estruch, Ramon; Cugueró Escofet, Miquel Àngel; Sanz Estapé, Gerard; Mirats, J M (2012-11-16)
    Article
    Open Access
    This paper proposes a model based detection and localisation method to deal with abnormal quality levels based on the chlorine measurements and chlorine sensitivity analysis in a water distribution network. A fault isolation ...
  • Accuracy assessment of leak localisation method depending on available measurements 

    Pérez Magrané, Ramon; Cugueró Escofet, Miquel Àngel; Cugueró Escofet, Josep; Sanz Estapé, Gerard (2013)
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    Model-based leak localization methods are currently developed and applied to real cases. The performance and success of such methods depend highly both on models [Pérez et al. (2011a)] and the measurements available. The ...
  • Assessment of a leak localization algorithm in water networks under demand uncertainty 

    Cugueró Escofet, Josep; Blesa Izquierdo, Joaquim; Pérez Magrané, Ramon; Cugueró Escofet, Miquel Àngel; Sanz Estapé, Gerard (International Federation of Automatic Control (IFAC), 2015)
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    The performance and success of model-based leak localization methods applied to water networks highly depends on the uncertainty of the system considered. One of the main sources of uncertainty in these networks are the ...
  • Chlorine decay model calibration and comparison: application to a real water network 

    Nejjari Akhi-Elarab, Fatiha; Puig Cayuela, Vicenç; Pérez Magrané, Ramon; Quevedo Casín, Joseba Jokin; Cugueró Escofet, Miquel Àngel; Sanz Estapé, Gerard; Mirats Tur, Josep Maria (2013)
    Conference report
    Open Access
    This work presents a methodology to efficiently calibrate chlorine decay models. The calibration consists in estimating the unknown parameters by comparing the measured and simulated chlorine concentrations at the monitored ...
  • Chlorine decay model calibration and comparison: application to a real water network 

    Nejjari Akhi-Elarab, Fatiha; Puig Cayuela, Vicenç; Pérez Magrané, Ramon; Quevedo Casín, Joseba Jokin; Cugueró Escofet, Miquel Àngel; Sanz Estapé, Gerard; Mirats Tur, Josep Maria (2013)
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    This work presents a methodology to efficiently calibrate chlorine decay models. The calibration consists in estimating the unknown parameters by comparing the measured and simulated chlorine concentrations at the monitored ...
  • Combining contaminant event diagnosis with data validation/reconstruction : application to smart buildings 

    Cugueró Escofet, Miquel Àngel; Christodoulou, Marius; Quevedo Casín, Joseba Jokin; Puig Cayuela, Vicenç; García Valverde, Diego; Michaelides, Michalis P. (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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    In this work, a combined sensor data validation/reconstruction and contaminant event diagnosis approach is proposed for Smart Building systems, implemented as a twostage approach. In the first stage, sensor communication ...
  • Combining learning in model space fault diagnosis with data validation/reconstruction: Application to the Barcelona water network 

    Quevedo Casín, Joseba Jokin; Chen, Heran; Cugueró Escofet, Miquel Àngel; Tino, Peter; Puig Cayuela, Vicenç; García Valverde, Diego; Sarrate Estruch, Ramon; Yao, Xin (2014-02-14)
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    In this paper, an integrated data validation/reconstruction and fault diagnosis approach is proposed for critical infrastructure systems. The proposed methodology is implemented in a two-stage approach. In the first stage, ...
  • Inconsistent sensor data detection/correction: application to environmental systems 

    Cugueró Escofet, Miquel Àngel; Quevedo Casín, Joseba Jokin; Puig Cayuela, Vicenç; García Valverde, Diego (2014)
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    In this paper, a data detection/correction approach is proposed for a real environmental monitoring system, in order to provide a reliable dataset when sensor faults occur. This is the case of communication faults that may ...
  • Leak localization in water networks: a model-based methodology using pressure sensors applied to a real network in Barcelona 

    Pérez Magrané, Ramon; Sanz Estapé, Gerard; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Cugueró Escofet, Miquel Àngel; Nejjari Akhi-Elarab, Fatiha; Meseguer, Jordi; Cembrano Gennari, Gabriela; Mirats Tur, Josep Maria; Sarrate Estruch, Ramon (2014-08-01)
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    The efficient distribution of water is a subject of major concern for water utilities and authorities [1]. While some leaks in water distribution networks (WDNs) are unavoidable, one of the main challenges in improving the ...
  • Leakage isolation in water distribution networks: a comparative study of two methodologies on a real case study 

    Pérez Magrané, Ramon; Puig Cayuela, Vicenç; Nejjari Akhi-Elarab, Fatiha; Cugueró Escofet, Miquel Àngel; Sanz Estapé, Gerard; Mirats, J.M; Quevedo Casín, Joseba Jokin (IEEE, 2011)
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  • Leakage location in water distribution networks based on correlation measurement of pressure sensors 

    Quevedo Casín, Joseba Jokin; Cugueró Escofet, Miquel Àngel; Pérez Magrané, Ramon; Nejjari Akhi-Elarab, Fatiha; Puig Cayuela, Vicenç; Mirats Tur, Josep Maria (Internatinal Water Association (IWA), 2011)
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    Leaks are present to some extent in all water-distribution systems. This paper proposes a leakage localisation method based on the pressure measurements and pressure sensitivity analysis of nodes in a water distribution ...
  • Optimal placement of metering devices for multiple purposes 

    Pérez Magrané, Ramon; Sanz Estapé, Gerard; Cugueró Escofet, Miquel Àngel; Cugueró Escofet, Josep (2014)
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    Monitoring devices installed in a huge system like water distribution networks imply a high cost. This cost includes installation and maintenance. Thus, the placement of these devices must be optimal. The optimal sensor ...
  • Optimal pressure sensor placement for leak localisation using a relaxed isolation index : application to the Barcelona water network 

    Cugueró Escofet, Miquel Àngel; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Blesa Izquierdo, Joaquim (International Federation of Automatic Control (IFAC), 2015)
    Conference report
    Open Access
    Water distribution networks are large complex systems that are affected by leaks, which often entail high costs and may severely jeopardize the overall water distribution performance. Successful leak localisation is paramount ...
  • Parameter uncertainty modelling in water distribution network models 

    Pérez Magrané, Ramon; Sanz Estapé, Gerard; Cugueró Escofet, Miquel Àngel; Blesa Izquierdo, Joaquim; Cugueró Escofet, Josep (Elsevier, 2015)
    Conference report
    Open Access
    The use of water distribution network (WDN) models is an extended practice [13]. Confidence on decisions taken upon such models depends highly on their accuracy [11]. The parameters uncertainty has to be defined in order ...
  • Sensor data validation and reconstruction in water networks : a methodology and software implementation 

    García Valverde, Diego; Quevedo Casín, Joseba Jokin; Puig Cayuela, Vicenç; Cugueró Escofet, Miquel Àngel (2014)
    Conference report
    Open Access
    In this paper, a data validation and reconstruction methodology that can be applied to the sensors used for real-time monitoring in water networks is presented. On the one hand, a validation approach based on quality levels ...
  • Study of the isolability of leaks in a network depending on calibration of demands 

    Pérez Magrané, Ramon; Nejjari Akhi-Elarab, Fatiha; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Cugueró Escofet, Miquel Àngel; Cugueró Escofet, Miquel Àngel; Peralta, Antoni (2011)
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    Using the simulation models a methodology was developed for leakage detection and localisation in a water distribution network [4]. Such methodology is based on fault detection and isolation techniques. Sensitivity matrix ...
  • Temporal/spatial model-based fault diagnosis vs. hidden Markov models change detection method: application to the Barcelona water network 

    Quevedo Casín, Joseba Jokin; Alippi, Cesare; Cugueró Escofet, Miquel Àngel; Ntalampiras, Stavros; Puig Cayuela, Vicenç; Roveri, Manuel; García Valverde, Diego (2013)
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    This paper deals with a comparison of two differ- ent fault diagnosis frameworks. The first method is based on a temporal/spatial model-based analysis by exploiting a-priori information about the system under study, ...