Pub Date : 2025-11-08DOI: 10.1016/j.jmsy.2025.11.004
Zhongji Su , Zexi Hua , Yongchuan Tang , Qingyuan Zhu , Zhipeng Qi , Lei Wang
Uncertainty in maintenance timing affects planning for systems with time window constraints, creating risks of overflow and operational disruptions. This paper proposes a multi-objective robust optimization method for Cluster system maintenance planning, integrating Glue Value at Risk (GlueVaR) to capture timing uncertainty. The method restores system reliability through maintenance while using GlueVaR to quantify timing uncertainty. Using GlueVaR's multi-parameter features to capture decision-makers' risk preferences, the method embeds maintenance strategies and decision tendencies into system metrics. The approach constructs a multi-objective optimization model with nested maintenance-level decisions and task scheduling. An improved Multi-Objective Evolutionary Algorithm based on Decomposition (MOEA/D) solves the model, screens optimal solutions, and analyzes time window overflow risk. Simulations on equipment clusters from outdoor signaling systems at railway stations show that maintenance risks decrease by 31.13 %, 45.54 %, and 61.09 % under generally optimistic, relatively conservative, and conservative decision-making tendencies, respectively. These results confirm the correctness and effectiveness of the proposed methodology.
维护时间的不确定性影响了有时间窗口限制的系统规划,造成了溢出和操作中断的风险。本文提出了一种多目标鲁棒优化方法,利用Glue Value at Risk (GlueVaR)来捕获时间不确定性。该方法通过维护恢复系统可靠性,同时使用GlueVaR量化时序不确定性。该方法利用GlueVaR的多参数特征捕捉决策者的风险偏好,将维护策略和决策倾向嵌入到系统度量中。该方法构建了一个具有嵌套维护级决策和任务调度的多目标优化模型。采用改进的基于分解的多目标进化算法(MOEA/D)对模型进行求解,筛选最优解,分析时间窗溢出风险。对火车站室外信号系统设备群的仿真结果表明,在一般乐观、相对保守和保守决策倾向下,维修风险分别降低了31.13 %、45.54 %和61.09 %。这些结果证实了所提出方法的正确性和有效性。
{"title":"Cluster system maintenance scheduling multi-objective optimization method integrating time uncertainty GlueVaR risk","authors":"Zhongji Su , Zexi Hua , Yongchuan Tang , Qingyuan Zhu , Zhipeng Qi , Lei Wang","doi":"10.1016/j.jmsy.2025.11.004","DOIUrl":"10.1016/j.jmsy.2025.11.004","url":null,"abstract":"<div><div>Uncertainty in maintenance timing affects planning for systems with time window constraints, creating risks of overflow and operational disruptions. This paper proposes a multi-objective robust optimization method for Cluster system maintenance planning, integrating Glue Value at Risk (GlueVaR) to capture timing uncertainty. The method restores system reliability through maintenance while using GlueVaR to quantify timing uncertainty. Using GlueVaR's multi-parameter features to capture decision-makers' risk preferences, the method embeds maintenance strategies and decision tendencies into system metrics. The approach constructs a multi-objective optimization model with nested maintenance-level decisions and task scheduling. An improved Multi-Objective Evolutionary Algorithm based on Decomposition (MOEA/D) solves the model, screens optimal solutions, and analyzes time window overflow risk. Simulations on equipment clusters from outdoor signaling systems at railway stations show that maintenance risks decrease by 31.13 %, 45.54 %, and 61.09 % under generally optimistic, relatively conservative, and conservative decision-making tendencies, respectively. These results confirm the correctness and effectiveness of the proposed methodology.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 752-769"},"PeriodicalIF":14.2,"publicationDate":"2025-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Energy-efficient and data-driven decision-making has become a critical priority in modern manufacturing, particularly in customized or make-to-order (MTO) production where product variability causes large fluctuations in power consumption. Existing prediction models in this domain are often deterministic, lacking the ability to quantify uncertainty and capture hierarchical data dependencies, which limits their reliability for operational use. This study addresses this gap by developing a hierarchical Bayesian learning framework for power consumption prediction in customized stainless-steel manufacturing. The objective is to design models that not only achieve high predictive accuracy but also provide calibrated uncertainty estimates to support risk-aware production decisions. Four models, i.e., Hierarchical Bayesian Linear Regression (HBLR), Hierarchical Bayesian Neural Network (HBNN), Fully Connected Neural Network (FCN), and One-Dimensional Convolutional Neural Network (1D-CNN), were implemented and benchmarked using three inference algorithms: No-U-Turn Sampler (NUTS), Automatic Differentiation Variational Inference (ADVI), and Stein Variational Gradient Descent (SVGD). The innovation lies in systematically quantifying uncertainty using coverage probability, sharpness, and calibration error, and in establishing a unified comparison between probabilistic and deterministic models. Results show that the HBLR–NUTS model achieves the best trade-off between accuracy (RMSE = 11.85) and calibration quality (coverage 0.98), while ADVI offers near-equivalent performance with significantly lower computation time. These uncertainty-aware predictions can be directly integrated into Manufacturing Execution System (MES) and Enterprise Resource Planning (ERP) environments for energy-optimized scheduling and cost-aware planning. The proposed framework provides a scalable, interpretable, and statistically reliable foundation for advancing sustainable, data-driven manufacturing analytics.
{"title":"Uncertainty-aware power consumption prediction in customized stainless-steel manufacturing: A comparative study of hierarchical Bayesian and deep neural models","authors":"Akarawint Chawalitanont, Atit Bashyal, Hendro Wicaksono","doi":"10.1016/j.jmsy.2025.10.010","DOIUrl":"10.1016/j.jmsy.2025.10.010","url":null,"abstract":"<div><div>Energy-efficient and data-driven decision-making has become a critical priority in modern manufacturing, particularly in customized or make-to-order (MTO) production where product variability causes large fluctuations in power consumption. Existing prediction models in this domain are often deterministic, lacking the ability to quantify uncertainty and capture hierarchical data dependencies, which limits their reliability for operational use. This study addresses this gap by developing a hierarchical Bayesian learning framework for power consumption prediction in customized stainless-steel manufacturing. The objective is to design models that not only achieve high predictive accuracy but also provide calibrated uncertainty estimates to support risk-aware production decisions. Four models, i.e., Hierarchical Bayesian Linear Regression (HBLR), Hierarchical Bayesian Neural Network (HBNN), Fully Connected Neural Network (FCN), and One-Dimensional Convolutional Neural Network (1D-CNN), were implemented and benchmarked using three inference algorithms: No-U-Turn Sampler (NUTS), Automatic Differentiation Variational Inference (ADVI), and Stein Variational Gradient Descent (SVGD). The innovation lies in systematically quantifying uncertainty using coverage probability, sharpness, and calibration error, and in establishing a unified comparison between probabilistic and deterministic models. Results show that the HBLR–NUTS model achieves the best trade-off between accuracy (RMSE = 11.85) and calibration quality (coverage <span><math><mo>≈</mo></math></span> 0.98), while ADVI offers near-equivalent performance with significantly lower computation time. These uncertainty-aware predictions can be directly integrated into Manufacturing Execution System (MES) and Enterprise Resource Planning (ERP) environments for energy-optimized scheduling and cost-aware planning. The proposed framework provides a scalable, interpretable, and statistically reliable foundation for advancing sustainable, data-driven manufacturing analytics.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 713-735"},"PeriodicalIF":14.2,"publicationDate":"2025-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-07DOI: 10.1016/j.jmsy.2025.11.002
Fuxuan Chi , Han Lin , Jinchuan Zheng , Baohua Jia
Roll-to-Roll (R2R) system is widely employed in continuous manufacturing processes requiring high throughput and precise control. Conventional tension-based control mechanism works well for most materials, but it is insufficient for high precision fabrication of optical fibers, which exhibit viscoelastic properties due to their polymer protective layer. Optical fibers can elongate without noticeable tension variation, significantly compromising the position accuracy, a serious issue in applications such as distributed optical sensing. To date, no existing control strategies in R2R systems have adequately addressed this limitation, nor have system models been developed that capture both fiber tension and elongation simultaneously. Here, we propose, to the best of our knowledge, a tension control scheme and a model for R2R systems to simultaneously account for fiber tension and elongation. The model incorporates the analysis of fiber viscoelastic deformation during winding, tension variation induced by winding, utilizing parameter identification and simplification approach developed through combined simulation and experiments. It is verified by experiments with two commonly used polymer-coated fibers, namely acrylic and polyimide, under diverse conditions, including different winding speeds and tension references. The experimental results confirm the model’s accuracy in predicting the elongation and tension variation of the fiber during the R2R winding process. By enabling system analysis and accurate prediction of material elongation, this model facilitates position-aimed pre-compensation in R2R systems, significantly enhancing position accuracy. It is applicable to a wide range of R2R processes for optical fibers (with or without viscoelasticity), such as in the fabrication of Fiber Bragg Grating (FBG) arrays.
{"title":"Modeling and optimization of positioning setpoints in a roll-to-roll system for optical fiber manufacturing","authors":"Fuxuan Chi , Han Lin , Jinchuan Zheng , Baohua Jia","doi":"10.1016/j.jmsy.2025.11.002","DOIUrl":"10.1016/j.jmsy.2025.11.002","url":null,"abstract":"<div><div>Roll-to-Roll (R2R) system is widely employed in continuous manufacturing processes requiring high throughput and precise control. Conventional tension-based control mechanism works well for most materials, but it is insufficient for high precision fabrication of optical fibers, which exhibit viscoelastic properties due to their polymer protective layer. Optical fibers can elongate without noticeable tension variation, significantly compromising the position accuracy, a serious issue in applications such as distributed optical sensing. To date, no existing control strategies in R2R systems have adequately addressed this limitation, nor have system models been developed that capture both fiber tension and elongation simultaneously. Here, we propose, to the best of our knowledge, a tension control scheme and a model for R2R systems to simultaneously account for fiber tension and elongation. The model incorporates the analysis of fiber viscoelastic deformation during winding, tension variation induced by winding, utilizing parameter identification and simplification approach developed through combined simulation and experiments. It is verified by experiments with two commonly used polymer-coated fibers, namely acrylic and polyimide, under diverse conditions, including different winding speeds and tension references. The experimental results confirm the model’s accuracy in predicting the elongation and tension variation of the fiber during the R2R winding process. By enabling system analysis and accurate prediction of material elongation, this model facilitates position-aimed pre-compensation in R2R systems, significantly enhancing position accuracy. It is applicable to a wide range of R2R processes for optical fibers (with or without viscoelasticity), such as in the fabrication of Fiber Bragg Grating (FBG) arrays.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 736-751"},"PeriodicalIF":14.2,"publicationDate":"2025-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-05DOI: 10.1016/j.jmsy.2025.10.015
Xinyu Cao , Binzi Xu , Dengchao Huang , Wei Li , Chun Wang , Maoshan Liu , Yan Wang
In current computer-aided process planning (CAPP) systems, the quality of the typical process routes employed directly influences the overall quality of subsequent process planning. With the advent of the big data era, automated analysis and discovery of typical process routes using advanced artificial intelligence (AI) techniques have become a critical issue to address. Current research primarily focuses on linear/simple process routes, with relatively limited exploration of networked process routes. Therefore, considering the characteristics of networked process routes, this paper proposes a novel approach for discovering typical networked process routes based on networked sequence similarity and intelligent clustering. Specifically, by thoroughly analyzing the information requirements of networked process routes and integrating five embedded process information types, a multi-dimensional process information fusion-based comprehensive similarity measure is constructed using the Kuhn–Munkres (KM) algorithm and principal component analysis (PCA). Furthermore, to ensure the clustering effectiveness of the discovered typical networked process routes, quantity and radius soft constraints are introduced into the traditional typical process route discovery problem. Two nutcracker optimization algorithm (NOA)-optimized affinity propagation (AP) algorithms (i.e., NOA-OAP and NOA-IAP) are proposed to address this problem, aiming to enhance clustering performance and identify more suitable and practical typical networked process routes for CAPP. Finally, numerical illustrations validate that the proposed similarity measure can effectively distinguish subtle differences among various networked process routes, and the two proposed clustering algorithms can discover more representative and effective typical process routes.
{"title":"A novel typical networked process route discovery approach based on networked sequence similarity and intelligent clustering","authors":"Xinyu Cao , Binzi Xu , Dengchao Huang , Wei Li , Chun Wang , Maoshan Liu , Yan Wang","doi":"10.1016/j.jmsy.2025.10.015","DOIUrl":"10.1016/j.jmsy.2025.10.015","url":null,"abstract":"<div><div>In current computer-aided process planning (CAPP) systems, the quality of the typical process routes employed directly influences the overall quality of subsequent process planning. With the advent of the big data era, automated analysis and discovery of typical process routes using advanced artificial intelligence (AI) techniques have become a critical issue to address. Current research primarily focuses on linear/simple process routes, with relatively limited exploration of networked process routes. Therefore, considering the characteristics of networked process routes, this paper proposes a novel approach for discovering typical networked process routes based on networked sequence similarity and intelligent clustering. Specifically, by thoroughly analyzing the information requirements of networked process routes and integrating five embedded process information types, a multi-dimensional process information fusion-based comprehensive similarity measure is constructed using the Kuhn–Munkres (KM) algorithm and principal component analysis (PCA). Furthermore, to ensure the clustering effectiveness of the discovered typical networked process routes, quantity and radius soft constraints are introduced into the traditional typical process route discovery problem. Two nutcracker optimization algorithm (NOA)-optimized affinity propagation (AP) algorithms (i.e., NOA-OAP and NOA-IAP) are proposed to address this problem, aiming to enhance clustering performance and identify more suitable and practical typical networked process routes for CAPP. Finally, numerical illustrations validate that the proposed similarity measure can effectively distinguish subtle differences among various networked process routes, and the two proposed clustering algorithms can discover more representative and effective typical process routes.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 687-712"},"PeriodicalIF":14.2,"publicationDate":"2025-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-04DOI: 10.1016/j.jmsy.2025.10.012
Wenhang Dong , Dongpeng Li , Yuchen Ji , Hongpeng Chen , Shimin Liu , Zheng Ma , Fang Hao , Yuqi Ji , Hongwen Xing , Pai Zheng
Industrial robotic systems have been widely adopted in modern industries due to their advantages in high flexibility and strong adaptability. However, these systems are often limited by fragmented workflows, high cognitive demands on operators, and complex interaction programming. To address these issues, this study proposes a next-generation low-code programming framework empowered by large language models (LLMs), aiming to advance human-centric smart manufacturing (HCSM). By integrating the reasoning capabilities of LLMs into industrial robotic systems, the framework prioritizes intuitive, efficient, and operator-friendly interaction, establishing a novel paradigm for industrial applications. Additionally, the system incorporates a cognitive assistance module to reduce the cognitive burden on unskilled operators. Moreover, an LLM-based low-code programming module was designed, employing a multi-agent mechanism for intent recognition, parameter extraction, and human verification, thereby significantly enhancing the system’s ability to robustly handle unstructured natural language instructions in industrial environments. Finally, the system was validated through a case study on aircraft panel drilling, demonstrating its practicality and reliability while supporting unskilled operators in performing complex tasks. This validation indicates that the proposed method has broad potential for industrial applications.
{"title":"Towards a next-generation LLM empowered low-code programming industrial robotic system for human-centric smart manufacturing","authors":"Wenhang Dong , Dongpeng Li , Yuchen Ji , Hongpeng Chen , Shimin Liu , Zheng Ma , Fang Hao , Yuqi Ji , Hongwen Xing , Pai Zheng","doi":"10.1016/j.jmsy.2025.10.012","DOIUrl":"10.1016/j.jmsy.2025.10.012","url":null,"abstract":"<div><div>Industrial robotic systems have been widely adopted in modern industries due to their advantages in high flexibility and strong adaptability. However, these systems are often limited by fragmented workflows, high cognitive demands on operators, and complex interaction programming. To address these issues, this study proposes a next-generation low-code programming framework empowered by large language models (LLMs), aiming to advance human-centric smart manufacturing (HCSM). By integrating the reasoning capabilities of LLMs into industrial robotic systems, the framework prioritizes intuitive, efficient, and operator-friendly interaction, establishing a novel paradigm for industrial applications. Additionally, the system incorporates a cognitive assistance module to reduce the cognitive burden on unskilled operators. Moreover, an LLM-based low-code programming module was designed, employing a multi-agent mechanism for intent recognition, parameter extraction, and human verification, thereby significantly enhancing the system’s ability to robustly handle unstructured natural language instructions in industrial environments. Finally, the system was validated through a case study on aircraft panel drilling, demonstrating its practicality and reliability while supporting unskilled operators in performing complex tasks. This validation indicates that the proposed method has broad potential for industrial applications.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 675-686"},"PeriodicalIF":14.2,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-04DOI: 10.1016/j.jmsy.2025.10.007
Karl Lossie , Jan Hendrik Hellmich , Junjie Liang , Jonas Baum , Amon Göppert , Dennis Grunert , Robert H. Schmitt
The increasing diversity and shorter life cycles of technical products pose significant challenges for manufacturing companies, particularly in the context of providing specific and context-sensitive instructions to employees, especially in domains including maintenance, assembly and disassembly. This challenge holds significant importance in the context of the current skilled worker shortage. This paper proposes a solution by leveraging digital twin technology and smart services to automate the generation of context-sensitive instructions. The research outlines the development of a smart service system that uses real-time data from digital twins to create and deliver adaptive and user-specific instructions via smart devices. A conceptual design of the smart service system, a prototypical implementation using a rolling mill maintenance task, and the verification and validation of the developed system were carried out. The results indicate that the proposed system effectively addresses the challenges of traditional manual instructions, enhancing efficiency, accuracy, and user satisfaction.
{"title":"Using a digital twin and smart services to enable automatic generation of context-sensitive instructions","authors":"Karl Lossie , Jan Hendrik Hellmich , Junjie Liang , Jonas Baum , Amon Göppert , Dennis Grunert , Robert H. Schmitt","doi":"10.1016/j.jmsy.2025.10.007","DOIUrl":"10.1016/j.jmsy.2025.10.007","url":null,"abstract":"<div><div>The increasing diversity and shorter life cycles of technical products pose significant challenges for manufacturing companies, particularly in the context of providing specific and context-sensitive instructions to employees, especially in domains including maintenance, assembly and disassembly. This challenge holds significant importance in the context of the current skilled worker shortage. This paper proposes a solution by leveraging digital twin technology and smart services to automate the generation of context-sensitive instructions. The research outlines the development of a smart service system that uses real-time data from digital twins to create and deliver adaptive and user-specific instructions via smart devices. A conceptual design of the smart service system, a prototypical implementation using a rolling mill maintenance task, and the verification and validation of the developed system were carried out. The results indicate that the proposed system effectively addresses the challenges of traditional manual instructions, enhancing efficiency, accuracy, and user satisfaction.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 652-674"},"PeriodicalIF":14.2,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-31DOI: 10.1016/j.jmsy.2025.10.009
Jeremy Cleeman , Adrian Jackson , Anandkumar Patel , Zihan Wang , Thomas Feldhausen , Chenhui Shao , Hongyi Xu , Rajiv Malhotra
Cyberphysical attacks on the digital backbone of Additive Manufacturing (AM) can compromise the printed part’s functionality. They can alter features in the digital geometry to introduce geometric defects (e.g., missing fillets) or alter process parameters to create local defects (e.g., voids). Addressing the downtime, waste, and quality deterioration associated with existing solutions requires operational resilience, i.e., rapid elimination or disruption of defect formation (to retain part function) without production stoppage or part disposal (to retain yield). This need is unmet due to the inherently unpredictable nature of attack-induced alterations, lack of access to the original geometric model for identification of altered geometric features, and in-process imposition of unknown process dynamics via attack-driven alteration of real-time-uncontrolled (or exogenous) parameters. This work establishes the above-mentioned operational resilience for the first time by creating two Digital Twins (DT). The Geometric DT (Geo-DT) is based on a unique physical-field-driven soft sensor and topology optimization method. The Process Digital Twin (Pro-DT) combines local defect quantification with a novel Reinforcement Learning formulation and training method. The importance of these methodological advances and the scalability of our approach are examined on a real AM testbed. It is shown that Geo-DT can correct geometric defects without access to the original digital geometry or explicit knowledge of attack-altered geometric features. Further, Pro-DT can accelerate real-time disruption of local defects despite attack-driven imposition of unknown process dynamics. We discuss how our framework goes beyond the contemporary focus on pre-attack security and in-attack detection towards resilience for AM and beyond.
{"title":"Operational resilience of additively manufactured parts to stealthy cyberphysical attacks using geometric and process digital twins","authors":"Jeremy Cleeman , Adrian Jackson , Anandkumar Patel , Zihan Wang , Thomas Feldhausen , Chenhui Shao , Hongyi Xu , Rajiv Malhotra","doi":"10.1016/j.jmsy.2025.10.009","DOIUrl":"10.1016/j.jmsy.2025.10.009","url":null,"abstract":"<div><div>Cyberphysical attacks on the digital backbone of Additive Manufacturing (AM) can compromise the printed part’s functionality. They can alter features in the digital geometry to introduce geometric defects (e.g., missing fillets) or alter process parameters to create local defects (e.g., voids). Addressing the downtime, waste, and quality deterioration associated with existing solutions requires operational resilience, i.e., rapid elimination or disruption of defect formation (to retain part function) without production stoppage or part disposal (to retain yield). This need is unmet due to the inherently unpredictable nature of attack-induced alterations, lack of access to the original geometric model for identification of altered geometric features, and in-process imposition of unknown process dynamics via attack-driven alteration of real-time-uncontrolled (or exogenous) parameters. This work establishes the above-mentioned operational resilience for the first time by creating two Digital Twins (DT). The Geometric DT (Geo-DT) is based on a unique physical-field-driven soft sensor and topology optimization method. The Process Digital Twin (Pro-DT) combines local defect quantification with a novel Reinforcement Learning formulation and training method. The importance of these methodological advances and the scalability of our approach are examined on a real AM testbed. It is shown that Geo-DT can correct geometric defects without access to the original digital geometry or explicit knowledge of attack-altered geometric features. Further, Pro-DT can accelerate real-time disruption of local defects despite attack-driven imposition of unknown process dynamics. We discuss how our framework goes beyond the contemporary focus on pre-attack security and in-attack detection towards resilience for AM and beyond.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 626-651"},"PeriodicalIF":14.2,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145416648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Machine tools are critical to modern manufacturing, yet their high energy consumption and vulnerability to faults present significant operational challenges. While predictive models can enhance energy optimization and fault diagnosis, their performance is often constrained by the scarcity of high-quality training data. To address this gap, this study presents a real-time digital twin (DT) framework that integrates OPAL-RT HIL simulation with OPC-UA-based cloud communication. The system enables both energy monitoring and synthetic fault data generation under diverse machining conditions. The DT operates in a bidirectional loop with a cloud-based data acquisition layer, allowing real-time parameter input and retrieval of simulated outputs. Model fidelity is verified by aligning simulation results with real-world CNC machine measurements and further confirmed through pattern-based external validation. The framework is applied to analyze energy consumption across varying machining parameters — such as electrospindle speed, feed rate, tool length, and depth of cut — and to simulate bearing fault scenarios for evaluating their impact on power consumption. These simulations produce labeled datasets suitable for future diagnostic and predictive maintenance applications. This work delivers a validated, closed-loop DT framework that unites high-fidelity OPAL-RT simulation, real-time OPC-UA data exchange, and synthetic data generation, extending predictive maintenance capabilities beyond those of prior modeling or diagnostic approaches. The proposed methodology offers a scalable foundation for energy-aware machining and real-time fault detection, contributing to sustainable manufacturing practices and operational resilience in smart industrial systems.
{"title":"A novel approach to digital twin-based energy efficiency monitoring and failure analysis in industrial applications","authors":"Mohsen Zeynivand, Parisa Esmaili, Loredana Cristaldi, Giambattista Gruosso","doi":"10.1016/j.jmsy.2025.10.011","DOIUrl":"10.1016/j.jmsy.2025.10.011","url":null,"abstract":"<div><div>Machine tools are critical to modern manufacturing, yet their high energy consumption and vulnerability to faults present significant operational challenges. While predictive models can enhance energy optimization and fault diagnosis, their performance is often constrained by the scarcity of high-quality training data. To address this gap, this study presents a real-time digital twin (DT) framework that integrates OPAL-RT HIL simulation with OPC-UA-based cloud communication. The system enables both energy monitoring and synthetic fault data generation under diverse machining conditions. The DT operates in a bidirectional loop with a cloud-based data acquisition layer, allowing real-time parameter input and retrieval of simulated outputs. Model fidelity is verified by aligning simulation results with real-world CNC machine measurements and further confirmed through pattern-based external validation. The framework is applied to analyze energy consumption across varying machining parameters — such as electrospindle speed, feed rate, tool length, and depth of cut — and to simulate bearing fault scenarios for evaluating their impact on power consumption. These simulations produce labeled datasets suitable for future diagnostic and predictive maintenance applications. This work delivers a validated, closed-loop DT framework that unites high-fidelity OPAL-RT simulation, real-time OPC-UA data exchange, and synthetic data generation, extending predictive maintenance capabilities beyond those of prior modeling or diagnostic approaches. The proposed methodology offers a scalable foundation for energy-aware machining and real-time fault detection, contributing to sustainable manufacturing practices and operational resilience in smart industrial systems.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 612-625"},"PeriodicalIF":14.2,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145416649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-31DOI: 10.1016/j.jmsy.2025.10.004
Yangyang Liu , Tang Ji , Xiangyu Guo , Xun Xu , Jan Polzer
Cognitive Digital Twin (CDT) represents an advanced evolution of traditional Digital Twin (DT) technology, overcoming constraints in perception, reasoning, learning, and self-evolution to meet the growing demands of complex and dynamic industrial systems. This study first analyses the conceptual evolution of CDT and categorises it into three categories based on differing research trends. Through a comparative analysis of the definitions across these categories, we summarise the core features of CDT. Based on these characteristics, this study proposes a novel evaluation criteria for CDT, which systematically assesses its performance in cognitive functions such as perception, reasoning, and memory. Finally, building upon the preceding analysis, we identify the key challenges currently facing the field and envision potential future research directions to provide theoretical insights and practical guidance for developing next-generation DT technology.
{"title":"Cognitive Digital Twin frameworks in manufacturing—A critical survey, evaluation criteria, and future directions","authors":"Yangyang Liu , Tang Ji , Xiangyu Guo , Xun Xu , Jan Polzer","doi":"10.1016/j.jmsy.2025.10.004","DOIUrl":"10.1016/j.jmsy.2025.10.004","url":null,"abstract":"<div><div>Cognitive Digital Twin (CDT) represents an advanced evolution of traditional Digital Twin (DT) technology, overcoming constraints in perception, reasoning, learning, and self-evolution to meet the growing demands of complex and dynamic industrial systems. This study first analyses the conceptual evolution of CDT and categorises it into three categories based on differing research trends. Through a comparative analysis of the definitions across these categories, we summarise the core features of CDT. Based on these characteristics, this study proposes a novel evaluation criteria for CDT, which systematically assesses its performance in cognitive functions such as perception, reasoning, and memory. Finally, building upon the preceding analysis, we identify the key challenges currently facing the field and envision potential future research directions to provide theoretical insights and practical guidance for developing next-generation DT technology.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 597-611"},"PeriodicalIF":14.2,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145416647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-30DOI: 10.1016/j.jmsy.2025.10.008
Pablo Malvido Fresnillo , Saigopal Vasudevan , Wael M. Mohammed , Jose A. Perez Garcia , Jose L. Martinez Lastra
Wire harnesses are critical components in modern vehicles, responsible for transmitting electrical signals and power to sensors and actuators. Despite the high level of automation in the automotive industry, wire harness manufacturing still relies heavilylargely depends on manual assembly. This is due to the significant challenges posed by the process, such as the complexity of perceiving and manipulating flexible materials and the high degree of customization required. As a result, existing solutions only address specific assembly tasks, rather than the entire processare fragmented, unable to scale to full production, and remain economically unviable for high-mix scenarios. To bridge this gap, this paper presents a novel robotic system for fully automating wire harness assembly. The system adopts a task-level programming methodology that leverages process knowledge to enable fast and easy reconfiguration. Additionally, it incorporates specific solutions to address key challenges in multi-branch wire harness manipulation, such as cable separation and entanglement prevention. The system’s performance was evaluated in two real-world assembly scenarios using a dual-arm robot. Experimental results demonstrate the system’s effectiveness and ease of reconfiguration, achieving success rates of 55% and 73% in two complex multi-branch wire harness assembly processes, and highlight areas of improvement, which will be further investigated in future works. The system repository is openly available allowing other researchers to build their solutions upon the proposed methodology.
{"title":"A dual-arm robotic system for automated multi-branch wire harness assembly in automotive industry","authors":"Pablo Malvido Fresnillo , Saigopal Vasudevan , Wael M. Mohammed , Jose A. Perez Garcia , Jose L. Martinez Lastra","doi":"10.1016/j.jmsy.2025.10.008","DOIUrl":"10.1016/j.jmsy.2025.10.008","url":null,"abstract":"<div><div>Wire harnesses are critical components in modern vehicles, responsible for transmitting electrical signals and power to sensors and actuators. Despite the high level of automation in the automotive industry, wire harness manufacturing still relies heavilylargely depends on manual assembly. This is due to the significant challenges posed by the process, such as the complexity of perceiving and manipulating flexible materials and the high degree of customization required. As a result, existing solutions only address specific assembly tasks, rather than the entire processare fragmented, unable to scale to full production, and remain economically unviable for high-mix scenarios. To bridge this gap, this paper presents a novel robotic system for fully automating wire harness assembly. The system adopts a task-level programming methodology that leverages process knowledge to enable fast and easy reconfiguration. Additionally, it incorporates specific solutions to address key challenges in multi-branch wire harness manipulation, such as cable separation and entanglement prevention. The system’s performance was evaluated in two real-world assembly scenarios using a dual-arm robot. Experimental results demonstrate the system’s effectiveness and ease of reconfiguration, achieving success rates of 55% and 73% in two complex multi-branch wire harness assembly processes, and highlight areas of improvement, which will be further investigated in future works. The system repository is openly available allowing other researchers to build their solutions upon the proposed methodology.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"83 ","pages":"Pages 577-596"},"PeriodicalIF":14.2,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145416704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}