Universitat Politècnica de Catalunya
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Pla general del vestíbul de l'edifici Coderch de l'ETSAB
No full textPla general del vestíbul de l'edifici Coderch de l'ETSAB
Primer pla de l'equip directiu de la FME amb el membre de l'estand Novartis en el Fòrum FME-Empresa 2023
No full textDimecres 10 de maig - vestíbul FME (d'12 a 15 h) Les empreses participants disposen d’un espai on poden interactuar amb els estudiants i recent titulats, responent els seus dubtes, oferint oportunitats de feina, convenis o col·laboracions educatives, i recollint currículums. Addicionalment, us oferim la possibilitat que les empreses ens envieu presentacions breus en vídeo a [email protected] , per tal que les puguem publicar al nostre web i fer-ne difusió a través de LinkedIn
Chaotic masking protocol for secure communication and attack detection in remote estimation of cyber-physical systems
No full textIn remote estimation of cyber-physical systems, the sensor measurement transmitted through network may be attacked by adversaries, leading to leakage risk of privacy (e.g., the system state), and/or failure of the remote estimator. To deal with this problem, a chaotic masking protocol is proposed in this paper to secure the sensor measurement transmission. In detail, at the plant side, a chaotic dynamic system is deployed to encode the sensor measurement, and at the estimator side, an estimator estimates both states of the physical plant and the chaotic system. This protocol can deal with multiple types of attacks, i.e., eavesdropping attack, replay attack, and stealthy false data injection attack.This research was in part supported by the National Natural Science Foundation of China under Grant No. 62203386, and Zhejiang Provincial Natural Science Foundation of China under Grant No. LZ23F030008. This research is carried out within the framework of the EU-funded Recovery, Transformation and Resilience Plan (Next Generation) thorugh the project ACROBA and the Spanish Ministry of Universities funded by the European Union - NextGenerationEU (2022UPC-MSC-93823). This work is part of the Project MAFALDA (PID2021-126001OB-C31) funded by MCIN/ AEI /10.13039/501100011033 and by ”ERDF A way of making Europe”. This work is part of the project MASHED (TED2021- 129927B-I00), funded by MCIN/ AEI/10.13039/501100011033 and by the European Union Next GenerationEU/PRTR. This work has been also partially founded by the ANR project Alligator (ANR-22- CE48-0009-01).Peer ReviewedPostprint (published version
On the spatial structure and intermittency of soot in a lab-scale gas turbine combustor: Insights from large-eddy simulations
No full textThis work presents a numerical investigation of soot formation in the Cambridge lab-scale gas turbine combustor. Large-eddy simulations (LES) of a swirl-stabilized ethylene flame are performed using the flamelet generated manifold method coupled with a discrete sectional model to account for soot formation, growth, and oxidation. The study aims to elucidate the mechanism governing the spatial structure and intermittency of soot, supported by comparisons with experimental data. The predicted soot distribution agrees well with measurements, with peak concentrations near the bluff body. Flow recirculation is identified as the key mechanism driving soot accumulation in fuel-rich regions, where surface reactions dominate soot mass growth. Soot intermittency arises from fluctuations in the flow field driven by interactions between the flame front and the recirculation vortex. Two soot modeling approaches are evaluated, differing in their treatment of soot model quantities: the first approach employs on-the-fly computation of source terms (FGM-C), while the second uses fully pre-tabulated source terms (FGM-T). Their predictive performance and computational cost are compared in the context of unsteady, sooting flames in swirl-stabilized combustors. Novelty and Significance Statement This paper offers detailed insights into soot production within a swirl-stabilized gas turbine combustor by employing a framework that couples Flamelet Generated Manifold chemistry with a Discrete Sectional Method for soot formation. Notably, this study provides a detailed characterization of flow-soot interactions, revealing the mechanism that governs the spatial structure of soot within the Cambridge rich-quench-lean combustor. Furthermore, it presents the first numerical investigation of soot intermittency in this turbulent flame configuration. This study also constitutes the first direct evaluation of the FGM-T formulation with soot section clustering in comparison with the more detailed FGM-C formulation within a lab-scale gas turbine combustor, offering insight into their respective predictive performance and computational cost.The research leading to these results has received funding from SAFIRE CPP2024-011547, a “Proyectos de colaboración público- privada” action of the Spanish Plan Estatal de Investigación Científica, Técnica
de Innovación 2024–2027. Leonardo Pachano acknowledges the AI4S fellowship within the “Generación D” initiative, Red.es, Ministerio para la Transformación Digital de la Función Pública, for talent attraction (C005/24-ED CV1). Funded by the European Union NextGenerationEU funds, through PRTR. DM acknowledges the Grant RYC2021-034654 funded by MICIU/AEI/10.13039/501100011033 and by “European Union NextGenerationEU/PRTR ”. The authors acknowledge computer resources, IM-2023-2-0011 and IM-2023-3-0013, from Red Española de Supercomputación, Spain. The authors gratefully acknowledge Dr. Ingrid El Helou and Prof. Epaminondas Mastorakos for generously sharing the experimental data on soot intermittency used in this study.Postprint (author's final draft
Análisis de fiabilidad de sistemas críticos en el A320/A321 y su impacto en el mantenimiento aeronáutico
No full textThis work analyses the reliability and maintenance management of critical systems in the Airbus A320/A321 aircraft family through a real-world case study. The main event corresponds to the hydraulic system (ATA 29), specifically the Y RSVR LO LVL warning, observed during line operation and managed following approved maintenance procedures. Based on anonymised maintenance records (techlogs, MOC reports, repetitive defects), the full process is reconstructed from fault detection to rectification, including the application of MEL and AMM references. Reliability indicators and operational impacts derived from MEL limitations and pre-flight checks are assessed. A complementary case from the flight control system (ATA 22, FAC 1 FAULT) is briefly discussed to highlight different failure modes and maintenance strategies within the same aircraft family. Results emphasise the importance of integrating operational data into reliability-centred and predictive maintenance programmes, consistent with EASA Part-M.El presente trabajo analiza la fiabilidad y el mantenimiento de sistemas críticos en la familia Airbus A320/A321 a partir de un caso real de operación. El estudio se centra en una incidencia en referencia al sistema hidráulico (ATA 29), concretamente la alerta "G/Y/B RSVR LO LVL", observada durante la operación en línea y gestionada conforme a los procedimientos de mantenimiento aprobados. A partir de los registros técnicos y de mantenimiento (techlogs, reportes MOC y defectos repetitivos) se reconstruye el proceso completo desde la detección de la anomalía hasta su resolución, aplicando las referencias documentales pertinentes del MEL y del AMM. El análisis permite evaluar la trazabilidad técnica, los indicadores de fiabilidad asociados y el impacto operativo que produce la aplicación de restricciones MEL y de tareas recurrentes previas al vuelo, como son las TBF (Task Before Flight). Asimismo, se pretende examinar de forma comparativa un segundo caso representativo del sistema de control de vuelo (ATA 22), asociado al mensaje FAC 1/2 FAULT, con el fin de ilustrar la diversidad de modos de fallo y estrategias de mantenimiento en aeronaves de esta familia. Los resultados muestran la relevancia de integrar la información de campo en programas de mantenimiento basados en fiabilidad (RCM) y en enfoques de mantenimiento predictivo, conforme a los principios establecidos en la normativa EASA Part-M
RV.S3.DR.V7 Vigas y Celosías
No full textVídeos docents de l'assignatura Representació Arquitectònica II (REVIT) impartida per Isidro Navarro, PDI de l'ETSA
Smart lighting system for workspaces: an adaptive desk lamp prototype
No full textThis Bachelor’s Thesis (TFG) presents the design and implementation of a lighting system for a desk lamp, whose objective is to maintain a constant illumination level in a workspace. The project includes the design of an electrical circuit using an Arduino UNO microcontroller with a proportional-integral (PI) controller and a digital light sensor, which allows the adjustment of the intensity of the LED according to ambient light variations. This is achieved through a program that measures ambient light and modulates the LED voltage to correct deviations from a set reference value. A physical prototype was implemented with an LED strip and low-power components, and tests were conducted under different lighting conditions to validate the behavior of the controller. The resulting prototype demonstrates that the system can maintain a constant light level, with minimal fluctuations, responding adequately to sudden and gradual changes in ambient illumination. The implemented PI controller balances response speed and stability, despite minor oscillations under extreme low or high light conditions. In conclusion, the project demonstrates that it is feasible to develop an automatic and costeffective lighting control system using commercial components, which can significantly improve visual comfort and energy efficiency in the work environment
RV.S4.DR.V1 Contenidos
No full textVídeos docents de l'assignatura Representació Arquitectònica II (REVIT) impartida per Isidro Navarro, PDI de l'ETSA