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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
Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial; Universitat Politècnica de Catalunya. SAC - Sistemes Avançats de Control; Universitat Politècnica de Catalunya. SIC - Sistemes Intel·ligents de Control
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, sensor communication faults are detected and corrected, in order to facilitate a reliable dataset to perform system fault diagnosis in the second stage. On the one hand, sensor validation and reconstruction are based on the combined use of spatial and time series models. Spatial models take advantage of the (mass-balance) relation between different variables in the system, whilst time series models take advantage of the temporal redundancy of the measured variables by means of Holt-Winters time series models. On the other hand, fault diagnosis is based on the learning-in-model-space approach that is implemented by fitting a series of models using a series of signal segments selected with a sliding window. In this way, each signal segment can be represented by one model. To rigorously measure the ‘distance’ between models, the distance in the model space is defined. The deterministic reservoir computing approach is used to approximate a model with the input–output dynamics that exploits spatial–temporal correlations existing in the original data. Finally, the proposed approach is successfully applied to the Barcelona water network.
Peer Reviewed
Àrees temàtiques de la UPC::Informàtica::Automàtica i control
Diagnostic errors
Automatic control
Time-series analysis
Learning in model space
Sensor data validation/reconstruction
Time series
Fault diagnosis
Reservoir computing
Errors de diagnòstic
Control automàtic
Sèries temporals--Anàlisi

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