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Soft sensor-based inline geometry control of hole-rolled polygon hubs 基于软传感器的轧孔多边形轮毂在线几何控制
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.023
Viktor Arne , Daniel Spies , Peter Groche
{"title":"Soft sensor-based inline geometry control of hole-rolled polygon hubs","authors":"Viktor Arne ,&nbsp;Daniel Spies ,&nbsp;Peter Groche","doi":"10.1016/j.ifacol.2025.03.023","DOIUrl":"10.1016/j.ifacol.2025.03.023","url":null,"abstract":"<div><div>New machine concepts, such as the 3D Servo Press, make it possible to implement and study new forming processes like the flexible hole-rolling. In combination with the ongoing development of models, new control concepts can be developed and thus increase productivity of manufacturing systems. As part of this work, a soft sensor was developed to predict the part geometry of a polygon profile during the process of hole rolling based on the process forces and the ram position. This prediction was used in an experimental investigation to set up an inline geometry control to compensate for the geometric error due to roller deflection during the process.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 127-132"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704143","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⁎ 基于聚类的高维性能空间探索
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 用于疫苗生产的酵母饲料批培养物的数字孪生开发
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 早期睡眠枕额电生理信号与宏观脑脊液流量
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⁎ 地下水中除铵离子交换过程的模型阶数还原研究[j]
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⁎ 二次谐波发电中相位匹配的烘箱温度分布：一种理论方法
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
Numerical Diffusion and its Impact on System-Identification for an Industrial Heating Process 数值扩散及其对工业加热过程系统辨识的影响
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.03.016
Ruven Weiss , Moritz Diehl , Johannes Reuter
{"title":"Numerical Diffusion and its Impact on System-Identification for an Industrial Heating Process","authors":"Ruven Weiss ,&nbsp;Moritz Diehl ,&nbsp;Johannes Reuter","doi":"10.1016/j.ifacol.2025.03.016","DOIUrl":"10.1016/j.ifacol.2025.03.016","url":null,"abstract":"<div><div>This paper deals with system-identification for a distributed parameter heating process where a solid substrate is moving through a spatially extended heating zone and heated up by applying hot air to its surface. The temperature distribution inside the substrate is modeled in a spatial plane, where heat conduction is considered in the direction, perpendicular to the direction of movement. In contrast to previous work, where scalar model parameters (e.g. the thermal parameters of the substrate) have been identified, here, the quantities for the heat transfer (heat transfer coefficient and air temperature) are identified as functions yielding a significantly improved fit to the measurement data. This improved system-identification is performed for two early-lumping modeling approaches, which differ in the way the advection term in the governing Partial Differential Equation is discretized: one uses Eulerian coordinates, where the computational grid is stationary, whereas the second employs Lagrangian coordinates where the grid is moving with the substrate. The differences of the two approaches are discussed with the main focus on numerical diffusion. Especially its impact on the system-identification is investigated: although the fit to the measurement is comparably good in both cases, very different solutions are obtained for the identified functions which, we argue, is due to the optimizer counteracting the smoothing effect of numerical diffusion.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 85-90"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704414","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
Comparing individualization strategies of Model Predictive Control for Artificial Pancreas 人工胰腺模型预测控制的个性化策略比较
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.06.007
Lorenzo Cester , Francesco Prendin , Alessandro Chiuso , Simone Del Favero
{"title":"Comparing individualization strategies of Model Predictive Control for Artificial Pancreas","authors":"Lorenzo Cester ,&nbsp;Francesco Prendin ,&nbsp;Alessandro Chiuso ,&nbsp;Simone Del Favero","doi":"10.1016/j.ifacol.2025.06.007","DOIUrl":"10.1016/j.ifacol.2025.06.007","url":null,"abstract":"<div><div>Personalization is a key in developing technologies for Type 1 Diabetes (T1D) management, given the large inter- and intra-variability in patients response. This holds in the design of Artificial Pancreas (AP) systems as well. Model Predictive Control (MPC) is one of the most adopted control strategies for this purpose. Leveraging a model of glucose-insulin dynamics, MPC proactively adjusts insulin infusion based on the predicted impact of this action on glucose concentration level. Personalization strategies in MPC could be based on the use of individual-specific models and/or rely on the customization of the cost function. A comparison of these approaches seems to be missing in literature. Therefore, this work investigates three levels of individualization (of cost only, model only, and both cost and model) for a MPC-based AP system. Their comparison is performed using the <em>UVa/Padova T1D Simulator</em> (v.S2014). The latter two strategies are found to significantly outperform the former, provided that the adopted individualized model is compliant with basic physiological requirements.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 2","pages":"Pages 37-42"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient Attitude Estimation for Mobile Wheeled Robots Using Elevation Maps 基于高程图的轮式移动机器人姿态估计
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.07.011
Charifou Orou Mousse , Mohamed Benrabah , Dieumet Denis , François Marmoiton , Roland Chapuis
{"title":"Efficient Attitude Estimation for Mobile Wheeled Robots Using Elevation Maps","authors":"Charifou Orou Mousse ,&nbsp;Mohamed Benrabah ,&nbsp;Dieumet Denis ,&nbsp;François Marmoiton ,&nbsp;Roland Chapuis","doi":"10.1016/j.ifacol.2025.07.011","DOIUrl":"10.1016/j.ifacol.2025.07.011","url":null,"abstract":"<div><div>Ensuring the dynamic stability of a wheeled robot in off-road navigation requires continuous state monitoring to anticipate risks such as slipping, skidding, or overturning. While proprioceptive sensors can monitor the robot’s state, fully predicting it remains challenging since its variables depend on robot-terrain interaction. This work aims to propose a direct geometric method to estimate the robot’s attitude by approximating wheel-ground contact with circles and leveraging an elevation map. Our approach is intuitive, straightforward to implement, precise, and computationally efficient. Experimental results, both in simulation and using a real robotic platform, validate its effectiveness.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 3","pages":"Pages 61-66"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Time-Optimal Lane Change for Tractor-Semitrailer on Varying Road Friction: Performance Bounds for Autonomous Driving⁎ 牵引车-半挂车在不同道路摩擦下的时间最优变道：自动驾驶性能界限
IFAC-PapersOnLine Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.07.005
Gustav Vallinder , Sriharsha Bhat , Jonas Mårtensson
{"title":"Time-Optimal Lane Change for Tractor-Semitrailer on Varying Road Friction: Performance Bounds for Autonomous Driving⁎","authors":"Gustav Vallinder ,&nbsp;Sriharsha Bhat ,&nbsp;Jonas Mårtensson","doi":"10.1016/j.ifacol.2025.07.005","DOIUrl":"10.1016/j.ifacol.2025.07.005","url":null,"abstract":"<div><div>Emergency maneuvers for autonomous tractor-semitrailer combinations have been studied in previous works, but questions remain in order to demonstrate safety in all weather and road conditions. By formulating a lane change maneuver in different road conditions as a numerical optimal control problem, an upper performance bound can be established and subsequently used as a benchmark in the development of autonomous driving or advanced driver assistance-systems. The resulting optimal maneuver indicates that the time-optimality of a maneuver is strongly linked to the force direction of the trailer axle. Comparing the optimal lane change maneuvers with optimal straight line braking indicates that the decision of whether to brake or evade in emergency situations should be informed by the available tire-road friction. The results can be used to inform safe autonomous vehicle behaviors in low-friction conditions.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 3","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":"144662545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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