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A Benchmark Model for Model Order Reduction: Large-scale Wind Farms
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.027
Hanqing Zhang , Zilong Gong , Adrià Junyent-Ferré , Giordano Scarciotti
{"title":"A Benchmark Model for Model Order Reduction: Large-scale Wind Farms","authors":"Hanqing Zhang ,&nbsp;Zilong Gong ,&nbsp;Adrià Junyent-Ferré ,&nbsp;Giordano Scarciotti","doi":"10.1016/j.ifacol.2025.03.027","DOIUrl":"10.1016/j.ifacol.2025.03.027","url":null,"abstract":"<div><div>A large-scale wind farm model is presented as a benchmark model for various model order reduction (MOR) methods. Firstly, the detailed mathematical description of a wind turbine generator is provided, including the aerodynamic and mechanical sub-blocks of the wind turbine, the electrical sub-block of the generator, and the associated controllers. Based on the wind turbine generator model, a large-scale wind farm model is created whose dimension can be easily changed to test MOR methods on different scales. Finally, the wind farm model is utilised as a benchmark model to show the performance of a nonlinear MOR method and a linear MOR method.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 151-156"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic Modeling and Estimation of Uncharacterized Reactions in H. pluvialis Production Scale Cultivation⁎
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.031
Marta Mandis , Pascal Jerono , Thomas Meurer
{"title":"Dynamic Modeling and Estimation of Uncharacterized Reactions in H. pluvialis Production Scale Cultivation⁎","authors":"Marta Mandis ,&nbsp;Pascal Jerono ,&nbsp;Thomas Meurer","doi":"10.1016/j.ifacol.2025.03.031","DOIUrl":"10.1016/j.ifacol.2025.03.031","url":null,"abstract":"<div><div>This paper addresses the modeling of astaxanthin accumulation in the microal-gae Haematococcus pluvialis, a well-known source of natural astaxanthin, under fluctuating environmental conditions. For biomass growth and astaxanthin accumulation first principles models under sufficient nutrient concentration and high incident light exposure are derived. The obtained models are validated using measurement data of an outdoor production plant, and are the basis for implementing an extended Kalman Filter (EKF) for state and unknown reaction rate estimation.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 175-180"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Computationally Efficient Optimal Control Problem Formulation Illustrated by Automotive Applications
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.006
F. Wegscheider , A. Galkina , J. Maier , K. Schlacher , M. Reichhartinger
{"title":"Computationally Efficient Optimal Control Problem Formulation Illustrated by Automotive Applications","authors":"F. Wegscheider ,&nbsp;A. Galkina ,&nbsp;J. Maier ,&nbsp;K. Schlacher ,&nbsp;M. Reichhartinger","doi":"10.1016/j.ifacol.2025.03.006","DOIUrl":"10.1016/j.ifacol.2025.03.006","url":null,"abstract":"<div><div>The paper focuses on reducing computational time when solving optimal control problems by expressing them within a flat coordinate system. To demonstrate and discuss this approach, two case studies are presented: time-optimal velocity trajectory planning and torque control of permanent magnet synchronous motors. The reformulated optimal control problems show significant reductions in computational time without affecting the resulting trajectories. Additionally, analyses were performed to investigate the impact of prediction horizons and solver starting values on the observed computational advantages. The results clearly show the potential of the presented method for developing computationally efficient optimization-based control strategies.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 25-30"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of Recurrent Neural Networks for Predictive Modeling of Electrical Submersible Pumps in Oil Extraction
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.010
Carine Menezes Rebello , Erbet Almeida Costa , Odilon Santana Luiz de Abreu , Galdir Reges , Vinicius Viena , Tefilo Paiva Guimares Mendes , Marcio Fontana , Francisco Raphael Ribeiro Bacellar , Marcos Pellegrini Ribeiro , Bernardo Pereira Foresti , Leizer Schnitman , Idelfonso B.R. Nogueira
{"title":"Application of Recurrent Neural Networks for Predictive Modeling of Electrical Submersible Pumps in Oil Extraction","authors":"Carine Menezes Rebello ,&nbsp;Erbet Almeida Costa ,&nbsp;Odilon Santana Luiz de Abreu ,&nbsp;Galdir Reges ,&nbsp;Vinicius Viena ,&nbsp;Tefilo Paiva Guimares Mendes ,&nbsp;Marcio Fontana ,&nbsp;Francisco Raphael Ribeiro Bacellar ,&nbsp;Marcos Pellegrini Ribeiro ,&nbsp;Bernardo Pereira Foresti ,&nbsp;Leizer Schnitman ,&nbsp;Idelfonso B.R. Nogueira","doi":"10.1016/j.ifacol.2025.03.010","DOIUrl":"10.1016/j.ifacol.2025.03.010","url":null,"abstract":"<div><div>This study presents a mathematical modeling framework that leverages recurrent neural networks (RNNs), specifically echo state networks (ESNs) and long short-term memory (LSTM) architectures, for the predictive modeling of electrical submersible pumps (ESPs) in offshore oil extraction operations. Utilizing real operational data from an offshore oil field, the research addresses the inherent complexity and nonlinear dynamics of ESP systems by employing these recurrent structures to capture and represent the temporal dependencies within the data. Key challenges, such as data noise, variability, and limited diversity, are systematically tackled to ensure robust dynamic modeling. A comparative analysis evaluates the performance of ESN and LSTM models under these constrained data conditions, aiming to identify the superior model in terms of predictive accuracy and resilience. The modeling approach emphasizes the formulation, parameterization, and validation processes essential for effective ESP optimization and control in real-world industrial settings. Findings reveal the distinct strengths and limitations of each RNN variant when applied to offshore operational data.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 49-54"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A transferable PINN-based method for quantum graphs with unseen structure⁎
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.013
Csongor L. Laczkó , Mihály A. Vághy , Mihály Kovács
{"title":"A transferable PINN-based method for quantum graphs with unseen structure⁎","authors":"Csongor L. Laczkó ,&nbsp;Mihály A. Vághy ,&nbsp;Mihály Kovács","doi":"10.1016/j.ifacol.2025.03.013","DOIUrl":"10.1016/j.ifacol.2025.03.013","url":null,"abstract":"<div><div>This study introduces a transferable approach for solving partial differential equations (PDEs) on metric graphs, often called quantum graphs, employing Physics-Informed Neural Networks (PINNs). Unlike traditional solvers constrained by specific graph structures, our method utilizes a Neumann-Neumann domain decomposition technique, offering adaptability across various network topologies. By incorporating edge-wise surrogates, this approach achieves experimental results comparable to those obtained with FEM across diverse network configurations.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 67-72"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploration of High-Dimensional Performance Spaces via Clustering⁎
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.072
Benedikt Ohse , Christopher Schneider
{"title":"Exploration of High-Dimensional Performance Spaces via Clustering⁎","authors":"Benedikt Ohse ,&nbsp;Christopher Schneider","doi":"10.1016/j.ifacol.2025.03.072","DOIUrl":"10.1016/j.ifacol.2025.03.072","url":null,"abstract":"<div><div>Performance spaces obtain all possible combinations of competing performance parameters for analog integrated circuits, like gain and bandwidth. The best combinations of those performances form the so-called Pareto front. While these spaces contain a lot of information, visualizing them—especially in high dimensions—can be overwhelming and difficult. Therefore, we present a combination of Parallel Coordinates plots together with a clustering algorithm in order to allow the exploration of performance spaces in a simple and intuitive manner. To compute approximations of those high-dimensional spaces, we use a parallelized version of a state-of-the-art box-coverage algorithm. Several numerical simulations for operational transconductance amplifiers demonstrate the functionality and efficiency of our concept for up to eight-dimensional performance spaces.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 421-426"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Digital twin development of yeast fed-batch cultures for vaccine production
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.067
Micaela Benavides , Pascal Gerkens , Gaël de Lannoy , Laurent Dewasme , Alain Vande Wouwer
{"title":"Digital twin development of yeast fed-batch cultures for vaccine production","authors":"Micaela Benavides ,&nbsp;Pascal Gerkens ,&nbsp;Gaël de Lannoy ,&nbsp;Laurent Dewasme ,&nbsp;Alain Vande Wouwer","doi":"10.1016/j.ifacol.2025.03.067","DOIUrl":"10.1016/j.ifacol.2025.03.067","url":null,"abstract":"<div><div>This paper reports on designing a digital twin of a yeast culture process in an industrial context. Using a rich experimental data set corresponding to different input profiles, an original dynamic model based on the assumption of cell overflow metabolism is derived. The kinetic laws are represented by smooth functions combining Monod and Jerusalimski factors, which model rate activation and inhibition, respectively. Parameter estimation is achieved following an iterative procedure including practical identifiability analyses which allow the design of informative experiments, enhancing parameter precision and accuracy.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 391-396"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Occipital Versus Frontal Electrophysiological Signal and Macroscopic Cerebrospinal Fluid Flow in Early Sleep
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.053
Paula Heinrich , Leander Müller , Rachel Nuttall , Benedikt Zott , Christian Sorg , Matthias Kreuzer , Gerhard Schneider , Juliana Zimmermann
{"title":"Occipital Versus Frontal Electrophysiological Signal and Macroscopic Cerebrospinal Fluid Flow in Early Sleep","authors":"Paula Heinrich ,&nbsp;Leander Müller ,&nbsp;Rachel Nuttall ,&nbsp;Benedikt Zott ,&nbsp;Christian Sorg ,&nbsp;Matthias Kreuzer ,&nbsp;Gerhard Schneider ,&nbsp;Juliana Zimmermann","doi":"10.1016/j.ifacol.2025.03.053","DOIUrl":"10.1016/j.ifacol.2025.03.053","url":null,"abstract":"<div><div>The glymphatic hypothesis suggests that cerebrospinal fluid (CSF) bulk movement across the brain plays a major role in brain waste clearance. Previous studies using simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) indicate that CSF flow and EEG delta activity (0.5–4 Hz) are coupled, especially during sleep. In our study we investigated this relationship focusing on spatial distinction between the occipital and frontal brain region as well as slow (0.5–2 Hz) and fast (2–4 Hz) delta sub-bands. For this, we used a public EEG-fMRI dataset from 29 healthy young adults during wakefulness and early sleep stages. Our results show only slight changes in the correlation between EEG delta activity and CSF flow as individuals transitioned into light sleep. However, we observed differences within regions and frequency bands during sleep: Occipital delta activity exhibits a stronger correlation with CSF flow than frontal delta activity, and slow delta correlates more strongly than the fast delta sub-band. These results align with power spectral density (PSD) analyses, which reveal higher relative power in lower frequencies in occipital regions, while frontal regions display greater power in higher frequencies.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 307-312"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Model order reduction of an ion exchange process for ammonium removal in groundwater⁎
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.028
Luis Santamaria-Padilla , Roberto G. Ramírez-Chavarría
{"title":"Model order reduction of an ion exchange process for ammonium removal in groundwater⁎","authors":"Luis Santamaria-Padilla ,&nbsp;Roberto G. Ramírez-Chavarría","doi":"10.1016/j.ifacol.2025.03.028","DOIUrl":"10.1016/j.ifacol.2025.03.028","url":null,"abstract":"<div><div>This work introduces a formal framework for model order reduction of an ion exchange process commonly used in water treatment for human consumption. The objective is to retrieve a finite dimension model to describe the advection-diffusion-reaction-equation governing the ion exchange process in a packed bed reactor. A state-space model is derived using a finite-difference scheme to explain the ion exchange process for ammonium removal. Further, a model order reduction step is incorporated to streamline the computational complexity while preserving the essential dynamics of the system. Three model order reduction criteria are established based on the breakthrough curve retrieved by numerical simulations. The results quantitatively demonstrate the influence of the reduction criteria on the behavior of the breakthrough curves. This proposal aims to serve as a reference framework for designing experiments in ion exchange processes for ammonium removal and further optimizing these processes using estimation and control strategies.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 157-162"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Oven Temperature Profile for Phase-Matching in Second-Harmonic Generation: A Theoretical Approach⁎
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.015
Stephanie Mrzyglod , Christian Schmittner , Marwan Abdou Ahmed , Thomas Graf , Oliver Sawodny
{"title":"The Oven Temperature Profile for Phase-Matching in Second-Harmonic Generation: A Theoretical Approach⁎","authors":"Stephanie Mrzyglod ,&nbsp;Christian Schmittner ,&nbsp;Marwan Abdou Ahmed ,&nbsp;Thomas Graf ,&nbsp;Oliver Sawodny","doi":"10.1016/j.ifacol.2025.03.015","DOIUrl":"10.1016/j.ifacol.2025.03.015","url":null,"abstract":"<div><div>A crucial factor in achieving high efficiency during second-harmonic generation is maintaining a constant temperature along the beam propagation in the nonlinear crystal, despite a significant non-homogeneous heat input through absorption. In this context, we present a theoretical approach to determine the necessary longitudinal oven temperature profile applied to the crystal’s shell surface to ensure a constant temperature at the center along the propagation axis. The approach is validated through simulations for an exemplary case, followed by a discussion of the results.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 79-84"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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