Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.09.029
Seymanur Al Habboush , Quang-Vinh Dang , Alp Akcay , Ivo Adan
Balancing assembly lines has drawn significant research interest over decades due to its vital impact on throughput without adding extra resources. This paper targets production facilities operating multiple identical assembly lines, particularly those facing challenges due to variable task durations across workstations. We propose a methodology for layout planning that prioritizes system-wide balance over independent line balance, leveraging simulation techniques. Our methodology involves removing workstations with long task durations from individual lines and centralizing them to serve all lines. In a real-world case study, the proposed methodology boosts throughput by up to 12% by optimizing the utilization of existing resources.
{"title":"An Integrated Layout and Resource Planning Approach for Assembly Lines","authors":"Seymanur Al Habboush , Quang-Vinh Dang , Alp Akcay , Ivo Adan","doi":"10.1016/j.ifacol.2025.09.029","DOIUrl":"10.1016/j.ifacol.2025.09.029","url":null,"abstract":"<div><div>Balancing assembly lines has drawn significant research interest over decades due to its vital impact on throughput without adding extra resources. This paper targets production facilities operating multiple identical assembly lines, particularly those facing challenges due to variable task durations across workstations. We propose a methodology for layout planning that prioritizes system-wide balance over independent line balance, leveraging simulation techniques. Our methodology involves removing workstations with long task durations from individual lines and centralizing them to serve all lines. In a real-world case study, the proposed methodology boosts throughput by up to 12% by optimizing the utilization of existing resources.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 10","pages":"Pages 160-165"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160438","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.09.539
Florin Stoican , Theodor-Gabriel Nicu , Daniel-Mihail Ioan , Ionela Prodan
We revisit here the Koditschek-Rimon navigation function idea for the static sphere world case. While the theoretical scafolding is well-known, details about the numerical computations of the associated bounds are lacking in the literature. We present a full implementation of these bounds and propose future directions for reducing their conservatism.
{"title":"Computational aspects for the Koditschek-Rimon navigation function","authors":"Florin Stoican , Theodor-Gabriel Nicu , Daniel-Mihail Ioan , Ionela Prodan","doi":"10.1016/j.ifacol.2025.09.539","DOIUrl":"10.1016/j.ifacol.2025.09.539","url":null,"abstract":"<div><div>We revisit here the Koditschek-Rimon navigation function idea for the static sphere world case. While the theoretical scafolding is well-known, details about the numerical computations of the associated bounds are lacking in the literature. We present a full implementation of these bounds and propose future directions for reducing their conservatism.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 11","pages":"Pages 144-149"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181335","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.09.542
Dmitry A. Fetisov
We derive a necessary and sufficient condition for orbital flatness of single-input control systems. We show that a single-input control system S is orbitally fat if and only if the codistribution naturally associated with S is the Goursat structure. To find a new time and a fat output, one needs to transform the codistribution naturally associated with S into the Goursat normal form. Algorithms for constructing such a transformation are well known, so our condition is constructive and provides a systematic way to find a new time and a fat output. An illustrative example is given.
{"title":"Orbital Flatness of Single-Input Control Systems","authors":"Dmitry A. Fetisov","doi":"10.1016/j.ifacol.2025.09.542","DOIUrl":"10.1016/j.ifacol.2025.09.542","url":null,"abstract":"<div><div>We derive a necessary and sufficient condition for orbital flatness of single-input control systems. We show that a single-input control system S is orbitally fat if and only if the codistribution naturally associated with S is the Goursat structure. To find a new time and a fat output, one needs to transform the codistribution naturally associated with S into the Goursat normal form. Algorithms for constructing such a transformation are well known, so our condition is constructive and provides a systematic way to find a new time and a fat output. An illustrative example is given.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 11","pages":"Pages 162-167"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181338","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.09.553
C. Stoica , A. Visioli , J.A. Rossiter , J.L. Guzmán , B. Douglas , A. Venturino , A.-C. Braitor , D. Varagnolo , J. McDonald , P. Castillo-Garcia , S. Knorn , M. Ung
Studies have shown the advantages of combining Art and Science allowing a greater range of engagement by students across multiple senses and thus improving their long term retention and understanding of complex scientific notions, as well as the potential to reach out to broader audiences. This paper offers some insights from the “∞sCaR – 2D Animated Cart∞ns for Control Education Rise” project. The goal of this project is to develop 2D animated cartoons on Control to both motivate engineering students to pursue further studies in Control and also to help them better appreciate some of the foundational concepts. In consequence, the authors hope this will increase the impact of Control on the younger generation.
{"title":"Art and Control Engineering: developing animated cartoons for Control Education⁎","authors":"C. Stoica , A. Visioli , J.A. Rossiter , J.L. Guzmán , B. Douglas , A. Venturino , A.-C. Braitor , D. Varagnolo , J. McDonald , P. Castillo-Garcia , S. Knorn , M. Ung","doi":"10.1016/j.ifacol.2025.09.553","DOIUrl":"10.1016/j.ifacol.2025.09.553","url":null,"abstract":"<div><div>Studies have shown the advantages of combining Art and Science allowing a greater range of engagement by students across multiple senses and thus improving their long term retention and understanding of complex scientific notions, as well as the potential to reach out to broader audiences. This paper offers some insights from the “∞sCaR – <em>2D Animated Cart∞ns for Control Education Rise</em>” project. The goal of this project is to develop 2D animated cartoons on Control to both motivate engineering students to pursue further studies in Control and also to help them better appreciate some of the foundational concepts. In consequence, the authors hope this will increase the impact of Control on the younger generation.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 11","pages":"Pages 228-233"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181431","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.08.157
F. Marasciuolo , M. Dicorato , G. Forte , G. Tricarico
The wide integration of electric mobility into distribution grids raises issues related to the safe operation of the networks, because of demand peak increase and service to be provided, especially for high charging rates and high vehicle penetration levels. Another crucial aspect concerns the development of a proper charging infrastructure with the aim of ensuring smart charging performances avoiding heavy economic efforts for users. A promising solution is represented by the combination of renewable energy source, storage and charging station in a DC microgrid framework, that could enable smart resource control and allow bidirectional power exchange with the grid for service provision. In this paper, the structure of a modular DC-based electric vehicle supply infrastructure is presented, as real demonstrator installed at the premises of the Bari Port Authority. The main features, along with the communication and control framework of the demonstrator, are described, along with control functions under implementation, and presenting some preliminary test results on the field.
{"title":"ADC Microgrid as Electric Vehicle Supply Infrastructure: Energy Management Architecture and Field Implementation","authors":"F. Marasciuolo , M. Dicorato , G. Forte , G. Tricarico","doi":"10.1016/j.ifacol.2025.08.157","DOIUrl":"10.1016/j.ifacol.2025.08.157","url":null,"abstract":"<div><div>The wide integration of electric mobility into distribution grids raises issues related to the safe operation of the networks, because of demand peak increase and service to be provided, especially for high charging rates and high vehicle penetration levels. Another crucial aspect concerns the development of a proper charging infrastructure with the aim of ensuring smart charging performances avoiding heavy economic efforts for users. A promising solution is represented by the combination of renewable energy source, storage and charging station in a DC microgrid framework, that could enable smart resource control and allow bidirectional power exchange with the grid for service provision. In this paper, the structure of a modular DC-based electric vehicle supply infrastructure is presented, as real demonstrator installed at the premises of the Bari Port Authority. The main features, along with the communication and control framework of the demonstrator, are described, along with control functions under implementation, and presenting some preliminary test results on the field.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 9","pages":"Pages 321-326"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060813","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.08.158
Diego Rigato, Davide Biadene, Paolo Magnone, Tommaso Caldognetto
This paper presents an adaptive control technique for grid-forming converters to enhance power quality and frequency stability while providing inertial behavior. Using the virtual synchronous generator model, the approach emulates traditional synchronous machines operation but mitigates instability caused by high inertia values. The proposed adaptive inertia strategy dynamically adjusts the emulated inertia based on rate of change of frequency constraints. Simulation and experimental results demonstrate improved frequency stability and reduced power oscillations across various conditions, making this method a viable solution for enhancing grid forming converter operation.
{"title":"Adaptive Inertia Controller for Grid-Forming Converters","authors":"Diego Rigato, Davide Biadene, Paolo Magnone, Tommaso Caldognetto","doi":"10.1016/j.ifacol.2025.08.158","DOIUrl":"10.1016/j.ifacol.2025.08.158","url":null,"abstract":"<div><div>This paper presents an adaptive control technique for grid-forming converters to enhance power quality and frequency stability while providing inertial behavior. Using the virtual synchronous generator model, the approach emulates traditional synchronous machines operation but mitigates instability caused by high inertia values. The proposed adaptive inertia strategy dynamically adjusts the emulated inertia based on rate of change of frequency constraints. Simulation and experimental results demonstrate improved frequency stability and reduced power oscillations across various conditions, making this method a viable solution for enhancing grid forming converter operation.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 9","pages":"Pages 327-332"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060816","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.08.160
Emiliano Longo , Davide Spinelli , Matteo Giuliani , Andrea Castelletti
This work explores the application of the Multi-Objective Fitted Q-Iteration (MOFQI) algorithm in water systems control, and introduces the random sampling to maximise the exploration of the weights simplex. MOFQI, as an offline, model-free, and multi-objective control algorithm, mitigates the challenges of dimensionality, modeling complexity, and multiple objectives encountered by traditional dynamic programming approaches. We explore the construction of the training dataset and leverage the Extra-Trees regressor for the continuous Q-function approximation. We compared MOFQI to Stochastic Dynamic Programming (SDP) on the Lake Como case study, which is characterized by three conflicting objectives: flood and drought control and water supply.
{"title":"Multi-Objective Fitted Q-Iteration: Random sampling for enhanced weights simplex exploration⁎","authors":"Emiliano Longo , Davide Spinelli , Matteo Giuliani , Andrea Castelletti","doi":"10.1016/j.ifacol.2025.08.160","DOIUrl":"10.1016/j.ifacol.2025.08.160","url":null,"abstract":"<div><div>This work explores the application of the Multi-Objective Fitted Q-Iteration (MOFQI) algorithm in water systems control, and introduces the random sampling to maximise the exploration of the weights simplex. MOFQI, as an offline, model-free, and multi-objective control algorithm, mitigates the challenges of dimensionality, modeling complexity, and multiple objectives encountered by traditional dynamic programming approaches. We explore the construction of the training dataset and leverage the Extra-Trees regressor for the continuous Q-function approximation. We compared MOFQI to Stochastic Dynamic Programming (SDP) on the Lake Como case study, which is characterized by three conflicting objectives: flood and drought control and water supply.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 9","pages":"Pages 339-344"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060818","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.08.130
Giuseppe C. Calafiore, Luca Ambrosino
In this paper we propose a novel cohort-based dynamical model for describing the dynamics of charge of electric vehicles (EVs) entering a large EV parking/charge facility. Based on such model, we address the problem of optimally managing the charging and thus allocate power among the EVs so to minimize costs while maintaining customer satisfaction and fulfilling operational constraints. The problem is formulated as a Linear Program (LP), to be solved over a given period of time, on the basis of parameters estimated at the beginning of such period. Our approach is validated through simulations inspired by real electricity price data, demonstrating the potential for relevant cost saving compared to a First-In-First-Served (FIFS) strategy.
{"title":"A Cohort-Based Optimization Model for Electric Vehicles Charging","authors":"Giuseppe C. Calafiore, Luca Ambrosino","doi":"10.1016/j.ifacol.2025.08.130","DOIUrl":"10.1016/j.ifacol.2025.08.130","url":null,"abstract":"<div><div>In this paper we propose a novel cohort-based dynamical model for describing the dynamics of charge of electric vehicles (EVs) entering a large EV parking/charge facility. Based on such model, we address the problem of optimally managing the charging and thus allocate power among the EVs so to minimize costs while maintaining customer satisfaction and fulfilling operational constraints. The problem is formulated as a Linear Program (LP), to be solved over a given period of time, on the basis of parameters estimated at the beginning of such period. Our approach is validated through simulations inspired by real electricity price data, demonstrating the potential for relevant cost saving compared to a First-In-First-Served (FIFS) strategy.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 9","pages":"Pages 163-168"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061612","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.09.569
Christopher Townsend , Maria M. Seron
We have previously demonstrated that a switched affine system is stabilisable independently of the initial condition, i.e. there exists an asymptotically stabilising switching function which is the same for all initial conditions, if and only if there exists a stable convex combination of the sub-system matrices. This result was proven by constructing a stabilising switching function of unbounded switching frequency. The current paper proves that there exists a switching function with bounded switching frequency which stabilises a switched affine system independent of its initial condition.
{"title":"Initial Condition Independent Stabilisability of Switched Affine Systems","authors":"Christopher Townsend , Maria M. Seron","doi":"10.1016/j.ifacol.2025.09.569","DOIUrl":"10.1016/j.ifacol.2025.09.569","url":null,"abstract":"<div><div>We have previously demonstrated that a switched affine system is stabilisable independently of the initial condition, i.e. there exists an asymptotically stabilising switching function which is the same for all initial conditions, if and only if there exists a stable convex combination of the sub-system matrices. This result was proven by constructing a stabilising switching function of unbounded switching frequency. The current paper proves that there exists a switching function with bounded switching frequency which stabilises a switched affine system independent of its initial condition.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 12","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":"145242499","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}
Pub Date : 2025-01-01DOI: 10.1016/j.ifacol.2025.09.583
O. Bachelier , T. Cluzeau , Q. Helman , F.J. Silva Alvarez , N. Yeganefar
In this note, we show that an attractive equilibrium point of a continuous linear 2D Roesser system is asymptotically stable. The proof is strongly based on a technical result providing local bounds for the trajectory in terms of boundary conditions.
{"title":"Equivalence between attractivity and asymptotic stability for continuous 2D linear Roesser models","authors":"O. Bachelier , T. Cluzeau , Q. Helman , F.J. Silva Alvarez , N. Yeganefar","doi":"10.1016/j.ifacol.2025.09.583","DOIUrl":"10.1016/j.ifacol.2025.09.583","url":null,"abstract":"<div><div>In this note, we show that an attractive equilibrium point of a continuous linear 2D Roesser system is asymptotically stable. The proof is strongly based on a technical result providing local bounds for the trajectory in terms of boundary conditions.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 12","pages":"Pages 150-153"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242510","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号