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Adaptive multi-objective real-time hierarchical control for isolated microgrid clusters utilizing an enhanced particle swarm optimization strategy to optimize costs and emissions
No full textThis paper introduces an adaptive hierarchical control for an isolated microgrid cluster (IMGC) leveraging a real-time multi-objective particle swarm optimization (MOPSO) algorithm. It simultaneously considers CO2 emissions minimization as a tertiary control objective and total losses minimization as a primary control objective, integrating grid-supporting and grid-feeding inverters for MG interconnection. The effectiveness of the MOPSO-based hierarchical control is demonstrated across multiple scenarios. Compared to a hierarchical control based on proportional power distribution relative to the rated inverter capacities of the MGs, the proposed method shows a 27.21% reduction in total losses and a 7.66% reduction in CO2 emissions. When compared with an optimization based on the fmincon solver, the proposed approach achieves a 22.92% reduction in losses and a 3.5% decrease in emissions. Additionally, centralized secondary control improves MRE indices by 100.09%, ITAE by 28.5%, ITSE by 43.78%, IAE by 30.61%, and ITSE by 47.72%, compared to the primary control strategy based on proportional approach. The MOPSO approach demonstrates robustness and flexibility, maintaining stable frequency and voltage within set thresholds during MG failures and sudden demand changes. Finally, the practical feasibility of the proposed approach is verified in a hardware-in-the-loop experimental setup using an OPAL-RT4512 unit and a dSPACE MicroLabBox. The experimental results, utilizing a time step of 50 µs, are consistent with the simulation outcomes, ensuring voltage and frequency control as its rated references.This work was partially supported by Ministerio de Ciencia e Innovación, Agencia Estatal de Investigación, FEDER, UE (Grants PID2021-123633OB-C31, PID2021-123633OB-C32 and PID2021- 123633OB-C33 supported by MCIN/AEI/10.13039/501100011033/ FEDER, UE).Peer ReviewedPostprint (published version
Research assignment: project management presentation
No full textThe goal of this assignment is to transform a traditional presentation (originally created in Canva and exported as a PDF) into an interactive Genially presentation on Project Management. The new version will allow students to go through the material with interactive slides, pop-up windows, and dynamic elements. Each section will provide an engaging and educational learning experience that is aligned with the content of the original document. By converting the presentation into an interactive Genially format, the learning becomes more dynamic. Interactive slides, pop-up windows, quizzes, and clickable elements allow students to explore the content at their own pace and engage more actively with key concepts. The presentation will be created in three languages: English, Spanish, and Catalan, starting with the English version as the base.Incomin
Enhancing mine geothermal system efficiency via rebirthed heat flow pathways in phase change rechargeable battery
No full textThe coordinated development of coal and geothermal resources represents a recognized strategy for achieving dual-carbon targets. This study contributes to the engineering design methodology for the mine geothermal system (MGS) from a theoretical perspective. Specifically, it presents both experimental and theoretical research findings regarding the efficiency improvement of MGS through rebirthed heat flow pathways (HFP). The study initially analyzes the influence patterns of various engineering parameters of MGS on the thermal performance of the phase change rechargeable battery (PCB) and investigates the evolutionary characteristics of heat transfer within the PCB. It innovatively reveals the thermal regeneration mechanism of HFP through graded phase change charging and identifies its efficiency improvement principle, ultimately proposing a novel efficiency enhancement method based on the rebirthed HFP. This method undergoes both experimental and theoretical validation, yielding promising theoretical results: when PCB is employed to develop mine geothermal energy (MGE), the low-temperature solid-phase region gradually evolves from a triangular to a trapezoidal shape, primarily utilizing phase transition functionality along the diagonal direction. In addition, since the heat flow lines remain perpendicular to the iso-surfaces of the solid-phase fraction, the phase transition behavior predominantly governs the allocation of HFP. As a result, the graded phase change charging technology theoretically increases the heat production capacity of the PCB by 25.28 %. This method provides mine engineers a theoretical reference direction for the engineering design of MGSThe authors gratefully acknowledge the support by the National Natural Science Foundation of China [grant number 52404154], the Postdoctoral Fellowship Program of China Postdoctoral Science Foundation [grant number GZC20233012], Key Laboratory of Xinjiang Coal Resources Green Mining, Ministry of Education [grant number KLXGY- KB2412], the Natural Science Foundation of Jiangsu Province [Grants Number BK20210501], China National Administration of Coal Geology Major Special Project [grant number ZMKJ-2023-JBGS02]. The authors would like to acknowledge the editor and reviewers for their valuable comments for the improvement of this paper. Finally, we would like to thank all scholars in the citations for their inspirationPostprint (author's final draft
ADVANCED STATICAL INFERENCE ( Examen Final, 1 er Quadrimestre)
No full textExamen Final 1er Quadrimestre2025/20261r quadrimestr
A semigroup approach to a linear elastostatic problem in a semi-infinite strip
No full textWe describe via semigroup techniques the space decaying solutions to the system modeling an isotropic and homogeneous elastostatic semi-infinite band, both in the isothermal case and when thermal effects are present. The semigroup approach allows us to transfer some properties that typically occur in evolution problems to our model, such as analyticity and exponential decay at infinity. These results are closely related to the Saint-Venant principle. We conclude the article by recalling some consequences of the analyticity of the semigroup. The resulting properties are rather innovative compared to the usual results in the literature concerning the spatial decay of solutions.Peer ReviewedPostprint (published version
La Implementació d’un sistema de millora contínua a un supermercat
No full textAquest Treball de Fi de Grau (TFG) té com a objectiu principal el disseny i validació d'un nou Model Operatiu Estàndard ("To-Be") per a la cadena de supermercats Condis, utilitzant com a banc de proves la botiga de major facturació del grup (Condis Horta). Mitjançant l'aplicació de la filosofia Lean Management i la metodologia Kaizen, el projecte busca transformar l'eficiència operativa eliminant desaprofitaments (Mudas), optimitzant fluxos logístics i millorant l'experiència de client en un entorn d'alta complexitat omnicanal. La metodologia s'ha basat en un diagnòstic exhaustiu al Gemba (tècniques de Shadowing, VSM i anàlisi de temps), que ha permès quantificar ineficiències estructurals en la reposició i la línia de caixes. A partir d'aquest diagnòstic, i responent a un mandat estratègic de la direcció, l'abast del treball ha evolucionat des de la millora local cap al disseny d'un model escalable a les 170 botigues de la cadena. La proposta final s'articula sobre tres eixos estratègics: l'optimització de l'atenció a caixes i servei al client, la professionalització de la logística interna (reposició selectiva i massiva amb suport digital) i la segregació de fluxos per a la gestió eficient del canal online. Finalment, el document presenta un pla d'implementació del canvi cultural (Team Development Program) i una anàlisi de viabilitat econòmica que demostra el retorn de la inversió. El resultat és un full de ruta definit per a l'horitzó 2026, on l'estandardització i la digitalització esdevenen les claus per garantir la sostenibilitat i competitivitat del negoci
ELECTROMAGNETISME (Examen final 1r quadrimestre)
No full textTest i problemesResolved2025/20261r quadrimestr
Non-Linear reduced order modelling of transonic potential flows for fast aerodynamic analysis
No full textThis work presents a physics-based reduced order modelling (ROM) framework for the efficient simulation of steady transonic potential flows around aerodynamic configurations. The approach leverages proper orthogonal decomposition and a least-squares Petrov-Galerkin (LSPG) projection to construct intrusive ROMs for the full potential equation. To improve accuracy in regions affected by strong gradients and shock waves, a spatially weighted LSPG formulation is introduced, yielding enhanced robustness compared to unweighted projection. The ROM training relies on a non-linear -transformed Halton sampling of the parameter space, which concentrates samples in shock-prone regimes and improves generalization without increasing offline cost. The methodology is implemented within the open-source Kratos Multiphysics framework and validated on two benchmark configurations: the 2D NACA 0012 airfoil and the 3D ONERA M6 wing. The resulting ROMs achieve accurate reconstructions of aerodynamic fields and coefficients, with relative errors on the order of , while reducing the dimensionality of the full order models by approximately three orders of magnitude. Although the corresponding speed-ups ( in 2D and in 3D) remain modest for the present linear subspace setting, the results highlight the potential of physics-based intrusive ROMs as reliable surrogates for transonic flows. In the shock-dominated regimes examined, the proposed intrusive ROM provides more accurate and physically consistent solutions than standard data-driven surrogates. The framework provides a solid baseline for future extensions incorporating hyper-reduction and non-linear ROM strategies.M.Zuñiga and S.Ares de Parga acknowledge the Departament de Recerca i Universitats de la Generalitat de Catalunya for the financial support through the FI-AGAUR2022 and the FI-SDUR2021scholarships,respectively.Peer ReviewedPostprint (published version
Enhancing cellular-enabled collaborative robots planning through GNSS data for SAR scenarios
No full textCellular-enabled collaborative robots are becoming paramount in Search-and-Rescue (SAR) and emergency response. Crucially dependent on resilient mobile network connectivity, they serve as invaluable assets for tasks like rapid victim localization and the exploration of hazardous, otherwise unreachable areas. However, their reliance on battery power and the need for persistent, low-latency communication limit operational time and mobility. To address this, and considering the evolving capabilities of 5G/6G networks, we propose a novel SAR framework that includes Mission Planning and Mission Execution phases and that optimizes robot deployment. By considering parameters such as the exploration area size, terrain elevation, robot fleet size, communication-influenced energy profiles, desired exploration rate, and target response time, our framework determines the minimum number of robots required and their optimal paths to ensure effective coverage and timely data backhaul over mobile networks. Our results demonstrate the trade-offs between number of robots, explored area, and response time for wheeled and quadruped robots. Further, we quantify the impact of terrain elevation data on mission time and energy consumption, showing the benefits of incorporating real-world environmental factors that might also affect mobile signal propagation and connectivity into SAR planning. This framework provides critical insights for leveraging next-generation mobile networks to enhance autonomous SAR operations.The research leading to these results has been supported by the Spanish Ministry of Economic Affairs and Digital Transformation and the European Union — NextGeneration EU, in the framework of the Recovery Plan, Transformation and Resilience (PRTR) (Call UNICO I+D 5G 2021, ref. number TSI-063000-2021-6 and TSI-063000-2021-14), by the SNS JU under the European Union’s Horizon Europe research and innovation programme under Grant Agreement No. 101192521 (MultiX), by the CERCA Programme from the Generalitat de Catalunya and by the Project PID2024-157729OB-I00 funded by MICIU/AEI/10.13039/501100011033Peer ReviewedPostprint (published version
Puntos
No full textVídeos docents de l'assignatura Representació Arquitectònica IV, impartida per Isidro Navarro, PDI de l'ETSABVídeos docentes de la asignatura Representación Arquitectónica IV, impartida por Isidro Navarro, PDI de la ETSA